Purdue Extension

Pest Management - Field Crop Pests

alternate text here Product Code: WS-16
This 2024 Ohio, Indiana, Illinois, and Missouri Weed Control Guide focuses on the application of pesticides for the control of weeds in agronomic or horticultural crops. Learn about the importance of weed control and fin  More...
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The new fourth edition of this guide contains 324 pages of information for forage and livestock producers and the agricultural industries that serve them. This new edition features updates and changes throughout, includi  More...

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alternate text here Product Code: ID-317-25BX
This is a box of 25 copies of our popular in-field reference. The fourth edition of this pocket-size, in-field reference provides information for forage and livestock producers and the agricultural industries that serve  More...

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alternate text here Product Code: HO-339-W
Now that most states allow hemp to be grown, and more uses for hemp fiber are found, an increase in production may be ahead. Growers and policymakers will benefit from this publication, by a team of Purdue University res  More...
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Navigating the hemp industry, even as production in the U.S. is increasing, can be complicated. This Extension publication by Purdue University researchers highlights the challenges and barriers that hemp growers in five  More...
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alternate text here Product Code: E-276-W
This project is a guide to integrating Black Soldier Flies into a composting process. The goal of increasing organic matter recycling, generating soil amendments, and protein for small livestock. Impact: reduce input cos  More...
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This publication provides a table that includes the most widely marketed fungicide products to control common diseases in corn. It was updated in January 2021.  More...
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This publication discusses our current knowledge of tar spot, describes diseases commonly confused with the disease, and  More...

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This guide will help growers select integrated pest management practices (IPM) to manage weeds, diseases, and insects in hops in Indiana. It also lists pesticides registered for hops in Indiana if their use is warranted.  More...
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alternate text here Product Code: CPN-2010-W

This publication describes Goss's bacterial wilt and blight symptoms, describes disorders commonly confused with the disease, and recommends management strategies.

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This publication describes how several factors influence product compatibility. It is important to understand these basic factors (including formulation, tank mixing order, and carrier type) to help you effectively co  More...

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alternate text here Product Code: CPN-2007-17-W

Each year, plant pathologists around the North Central region coordinate their efforts to document disease-related losses in corn yields across the region. This publication documents the impact of major diseases on co  More...

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This publication reviews some of the most important factors to consider when applying a fungicide to manage Fusarium head blight (FHB or scab) and mycotoxins.

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alternate text here Product Code: CPN-4003-W

This publication describes the factors you should consider to help you make the right soybean seed treatment decisions for your operation. It also explores the three major types of seed treatments: fungicides, insecti  More...

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alternate text here Product Code: CPN-4004-W

This publication describes the main factors you should consider when selecting which soybean variety to plant.

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This publication describes some of the issues associated with dicamba applications and how growers can manage them.

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alternate text here Product Code: CPN-2009-W

Although generally considered a "tropical disease", southern rust can occur in important corn production areas of the United States and Canada. This publication describes the symptoms and signs of southern rust, how t  More...

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alternate text here Product Code: CPN-1018-15-W

Each year, plant pathologists around the North Central region coordinate their efforts to document disease-related losses in soybean yields across the region. This publication documents the impact of major diseases on  More...

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alternate text here Product Code: CPN-2007-16-W
Each year, plant pathologists around the North Central region coordinate their efforts to document disease-related losses in corn yields across the region. This publication documents the impact of major diseases on corn  More...
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alternate text here Product Code: CPN-4002-W

When it comes to cover crops, there are a lot of facts myths about weed, insect, and disease management. This publication provides basic information about using cover crops in your cropping system. The publication was  More...

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This item is intended only for extension offices or businesses who want to hand out copies at meetings. When it comes to cover crops, there are a lot of facts myths about weed, insect, and disease management. This pu  More...

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alternate text here Product Code: CPN-2008

Although only recently identified in the United States, bacterial leaf streak has been confirmed in several states. This publication examines what we know about the disease. The publication was created by the Crop Pro  More...

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alternate text here Product Code: CPN-1017

Frogeye leaf spot is a common disease in the United States and Ontario. This publication examines the disease, including symptoms and other conditions that may be similar. It also recommends ways to manage the disease  More...

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Fungicide resistance in field crops is a growing problem across the Corn Belt. This publication answers some frequently asked questions about how fungicide resistance develops and how you can manage it. The publicatio  More...

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alternate text here Product Code: POL-4

Although agronomic crops do not require pollinators to produce a crop, foraging bees are extremely likely to pass over or near agronomic crop fields in Indiana and states with similar cropping practices. As a result,  More...

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alternate text here Product Code: PPP-115

This is a joint publication of Purdue Extension and Southern Illinois University. This is the 13th edition of the biennial publication, which was previously published by Southern Illinois. This edition contains 780 en  More...

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alternate text here Product Code: CPN-2001
This publication describes how to identify the most common corn ear rots in the United States and Canada, discusses the mycotoxins associated with each ear rot, describes diseases and disorders easily confused with corn  More...
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alternate text here Product Code: CPN-2002
This publication answers frequently asked questions about mycotoxins in corn. Mycotoxins are chemical produced by certain fungi that are associated with corn ear rot diseases. The publication was created by the Crop Prot  More...
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alternate text here Product Code: CPN-2003
This publication recommends grain sampling and testing methods for detecting mycotoxins, which are chemicals associated with certain earr rot diseases. The publication was developed by the Crop Protection Network, which  More...
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alternate text here Product Code: CPN-2004
This publication outlines how to manage stored grain affected by mycotoxins, which are chemicals associated with certain ear rot diseases. The publication was developed by the Crop Protection Network, which includes auth  More...
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alternate text here Product Code: CPN-2005
This publication describes how certain products (called atoxigenics) can help manage aflatoxin levels in corn. Aflatoxin is a dangerous mycotoxin associated with Aspergillus ear rot. The authors also recommend when such  More...
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alternate text here Product Code: CPN-1016-W
Every disease-control product has limitations and may not always work the way it is intended. This publication answers some common questions that emerge when soybean plants do not. This publication was created by the Cro  More...
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alternate text here Product Code: CPN-1015-W
Soybean stem lines are associated with Diaporthe-Phomopsis disease complex. This publication explores what stem lines can indicate and what they do not indicate. This publication was created by the Crop Protection Networ  More...
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alternate text here Product Code: PPP-113

While agricultural pesticide applicators may not be able to control factors like habitat loss, they can take practical steps to help protect the pollinators so many in the agricultural industry rely upon. This publica  More...

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alternate text here Product Code: BP-162-W
This publication provides a table that includes the most widely marketed fungicide products to control common diseases in wheat. It was updated in April 2016.

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alternate text here Product Code: CPN-1001
This publication provides images, symptoms, and general management strategies for soybean seed diseases. The publication was developed by the Crop Protection Network, which includes authors from land-grant universities a  More...
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alternate text here Product Code: CPN-1002
This publication provides images, symptoms, and general management strategies for soybean stem diseases. The publication was developed by the Crop Protection Network, which includes authors from land-grant universities a  More...
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alternate text here Product Code: CPN-1003
This publication examines the symptoms of soybean vein necrosis virus (SVNV), describes how SVNV differs from several other plant problems that may look like SVNV, and provides other scouting information. The publication  More...
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alternate text here Product Code: CPN-1004
This publication examines the symptoms of charcoal rot in soybean, describes how charcoal rot differs from several other diseases that may look like it, provides other scouting information, and management recommendations  More...
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alternate text here Product Code: CPN-1006
This publication examines the symptoms of stem canker, describes how stem canker differs from several other plant problems that may look like stem canker, and provides other scouting information. The publication was crea  More...
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alternate text here Product Code: CPN-1007
This publication examines the symptoms of pod stem blight and phomopsis seed decay, describes how pod stem blight differs from several other plant problems that may look like pod stem blight, and provides other scouting  More...
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alternate text here Product Code: CPN-1008
This publication examines the symptoms of important soybean seedling diseases, describes how other plant problems may resemble seedling diseases, and provides management recommendations. The publication was created by th  More...
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alternate text here Product Code: CPN-1009

This brochure is a quick guide to help you scout for and identify common soybean seedling disorders. Disorders include Fusarium root rot, pre-emergence herbicides, planting issues, and Rhizoctonia seedling blight. the  More...

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alternate text here Product Code: CPN-1010
This publication is a quick-reference that provides images, symptoms, and general management strategies for white mold in soybean. The publication was developed by the Crop Protection Network, which includes authors from  More...
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alternate text here Product Code: CPN-1011
This publication examines the symptoms of sudden death syndrome (SDS), describes conditions favorable for the disease, explains how SDS differs from several other plant problems that may look like SDS, and recommends man  More...
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alternate text here Product Code: CPN-1012
This publication is a quick-reference that provides images, symptoms, and general management strategies for sudden death syndrome in soybean. The publication was developed by the Crop Protection Network, which includes a  More...
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alternate text here Product Code: BP-146-W
Each spring, one may commonly observe leaf mottling, yellow streaks, and mosaic discoloration across Indiana wheat fields. These symptoms are often caused by wheat viruses. This publication describes how to distinguish a  More...
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alternate text here Product Code: BP-90-W

Tar spot of corn (caused by the fungus Phyllachora maydis) was first confirmed in the United States in 2015. In 2018, a yield-reducing epidemic of tar spot occurred in northern Indiana and in surrounding states. Follo  More...

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alternate text here Product Code: BP-89-W
Stalk rots of corn are a common problem in Indiana and appear each year with varying degrees of severity. This publication describes: the signs and symptoms of stalk rots, the key causes of the seven most common stalk ro  More...
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alternate text here Product Code: CPN-2007-15-W
This is the fourth year that plant pathologists around the North Central region have coordinated their efforts to document disease-related losses in corn yields across the region. This publication documents the impact of  More...
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alternate text here Product Code: E-268-W
Neonicotinoid insecticides offer a wide range of potential applications, and they have become very popular as seed treatments. But are such treatments warranted? This publication summarizes the current research about neo  More...
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alternate text here Product Code: BP-87-W
This publication describes how to identify Diplodia ear rot, research information about foliar fungicide efficacy for Diplodia ear rot, and updated disease management guidelines for Diplodia ear rot.

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This publication examines current fungicide timing recommendations for treating Fusarium head blight (head scab) in light of current Purdue research. That research suggests that growers may adjust their application timin  More...
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alternate text here Product Code: BP-144-W
Stagonospora glume blotch (SGB), also called Stagonosopora nodorum blotch or glume blotch, is a common disease in Indiana wheat fields. This publication describes how to identify and manage the disease.

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alternate text here Product Code: BP-33-W
In Indiana, Fusarium head blight of wheat (FHB), periodically causes significant yield loss and reduced grain quality. The disease also produces mycotoxins, which are chemicals that are toxic to humans and livestock. Thi  More...
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Research has shown that certain grasses can be hosts for the bacterium that causes Goss's bacterial wilt and leaf blight of corn (commonly known as Goss's wilt). This publication describes how to identify Goss's wilt  More...

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This publication provides a description of rusty, flat and flour mill beetles. In addition, facts are provided about the biology, behavior and food preferences of the beetle.  More...
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This is a fact sheet that provides information about sawtoothed grain beetles. The sheet includes information on the biology, behavior and food preferences of the beetle.  More...
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alternate text here Product Code: E-77-W
This publication lists insect pests that attack soybean crops and suggests insecticides and chemicals for their control, along with suggested amounts, timing, and placement of application.

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alternate text here Product Code: E-219-W
This publication lists insect pests that attach corn crops and suggest insecticides and chemicals for their control, along with suggested amounts, timing, and placement of application.

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alternate text here Product Code: CPN-2007-14-W

This is the third year that plant pathologists around the North Central region have coordinated their efforts to document disease-related losses in corn yields across the region. This publication documents the impact  More...

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alternate text here Product Code: BP-86-W
The impact of Fusarium ear rot on yield is usually minimal, however, corn producers should be concerned about the risk of fumonisin contamination, which affect human and livestock health. This publication describes how t  More...
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alternate text here Product Code: BP-96-12-W
Although plant pathologists around the North Central region have noted the prominent diseases in their states or provinces for years, there has been no coordinated effort to document disease-related losses in corn yields  More...
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alternate text here Product Code: CPN-2007-13-W

This is the second year that plant pathologists around the North Central region have coordinated their efforts to document disease-related losses in corn yields across the region. This publication documents the impact  More...

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alternate text here Product Code: E-263-W
The Purdue Improved Crop Storage (PICS) bag is a cost-effective technology for storing grain to reduce post-harvest losses. Most of the PICS bags sold to date have 100 kg capacity but sometimes the 50 kg bags are availab  More...
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This set of digital flash cards, created in a PDF format designed for smart phones and tablets, helps entomology students recognize and identify the most common insects. It contains 150 insect photographs together with t  More...

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This guide provides an overview of the current knowledge of fungicides and their use on field crops. This comprehensive book combines past knowledge about fungicides with recent developments in the realm of field crop fu  More...

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To be notified when the Wheat Field Guide is available for purchase, please E-mail.<  More...

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This publication shares the perspective of some Purdue University scientists on the subject of managing weeds in crops, explains why 2,4-D and dicamba-tolerant crops were developed, and discusses some of the concerns sur  More...
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alternate text here Product Code: ID-451-W
This brochure offers quick tips to help grain producers, livestock producers, and storage and handling personnel minimize the risk posed by aflatoxin. Additional information is available on the Managing Moldy Corn websi  More...
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alternate text here Product Code: DW-1-W
The requirements for organic certification are time-consuming and expensive. And if a neighbor applies a pesticide that drifts onto an organic field, the economic losses can be high. This publication describes the conseq  More...
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alternate text here Product Code: E-210-W
Nematologist Soybean Cyst Nematode (SCN) is a pest that has had a considerable impact on soybeans in Indiana. This publication covers the biology and life cycle of SCN. It also provides information on sampling, manag  More...
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alternate text here Product Code: DW-10-W
Pesticide drift can severely damage non-target crops. This Driftwatch publication addresses drift in grapes. It examines products of special concern, injury symptoms and potential impact, and alternatives and ways to avo  More...
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alternate text here Product Code: BP-85-W
Arrested ear development is a physiological disorder that can significantly affect corn yields. It is not a disease, but refers to the abnormal corn ear development caused by a number of stress factors, including the app  More...
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alternate text here Product Code: BP-84-W
Northern corn leaf blight (NCLB), caused by the fungus Exserohilum turcicum, is an increasingly important disease in the U.S. Corn Belt. NCLB can cause yield loss if it develops before or during the tasseling and silking  More...
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alternate text here Product Code: WS-44-W
Spiny pigweed can often be found in pastures that are heavily grazed and in need of some attention. In pastures, spiny pigweed is a competitive weed and has been associated with nitrate accumulation in livestock. This pu  More...
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alternate text here Product Code: BP-83-W
The fungus Aspergillus flavus causes Aspergillus ear rot, one of the most important diseases in corn. The fungus produces a mycotoxin, - known as aflatoxin, - inside the diseased corn kernels. This bulletin describes how  More...
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alternate text here Product Code: ID-422-W
Management decisions in wheat production are growth-stage dependent. Applications of fertilizers, herbicides, and fungicides are most effective and profitable when applied at specific times. This publication describes pr  More...
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alternate text here Product Code: 13-41
The author uses this blog in conjunction with a class as a forum for exploring all subjects touching upon insects and arthropods. Comments are encouraged, but moderated, to encourage a thoughtful community. The author, J  More...
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alternate text here Product Code: WS-43-W
Perilla frutescens (L.) Britton is known by many names, including beefsteak plant, perilla mint, Chinese basil, purple mint, and rattlesnake weed. Due to its toxicity, it is important to control the plant. This  More...
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Although common rust and southern rust diseases rarely cause economic yield loss in Indiana, it is important to accurately diagnose these diseases and be aware of practical management options. This publication describes:  More...
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alternate text here Product Code: ID-418-W
Molds are a concern because they can reduce grain quality and storability. Under some conditions, certain molds can produce mycotoxins, substances that can be harmful to livestock and humans. This brochure explains basic  More...
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alternate text here Product Code: E-222-W
This publication provides a description of grain mites. In addition, facts are provided about the biology, behavior, food preferences and control methods for grain mites.  More...
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alternate text here Product Code: E-223-W
This publication provides a description of the Indianmeal moth. In addition, facts are provided about the biology, behavior and food preferences of the Indianmeal moth.  More...
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This fact sheet provides information about pirate bugs. The sheet includes information on the biology, behavior and food preferences of these bugs.  More...
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alternate text here Product Code: BP-81-W
Goss's bacterial wilt and leaf blight of corn was blamed for yield losses of as much as 60 bushels/acre in northwestern Indiana in 2008, proving that this bacterial disease can cause substantial yield loss in the state.  More...
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alternate text here Product Code: E-17-W
This publication describes the habits and damage caused by European corn borer. It also suggests methods for its control.  More...
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alternate text here Product Code: E-225-W
This publication provides a description of parasitic wasps. Parasitic wasps are beneficial insects commonly found in grain/food storages. The publication provides facts about the biology, behavior and food preferences of  More...
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alternate text here Product Code: E-226-W
This publication provides a description of the hairy fungus beetle, a pest of grain that feeds on mold. In addition, facts are provided about the biology, behavior and food preferences of the beetle.  More...
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alternate text here Product Code: E-236-W
Angoumois grain moth can be a pest of corn in the field and storage. This publication describes this pest and recommends methods for controlling it.

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alternate text here Product Code: E-238-W
The lesser grain borer is a pest that feeds on a variety of food. This publication provides a description and discusses its biology and behavior and the types of food it feeds on.  More...
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alternate text here Product Code: E-74-W
Gives description, life cycle, plants affected, and chemical control measures against the flea beetle.  More...
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alternate text here Product Code: E-80-W
Gives picture and general description of ten common stored grain insect pests of Indiana.  More...
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alternate text here Product Code: E-217-W
In 2000, a new insect, soybean aphid, Aphis glycines Matsumura, was discovered in soybean fields in many areas of the Midwest, including Indiana. Since its discovery it has caused significant damage to Indiana soybean fi  More...
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alternate text here Product Code: E-49-W
The biology and management of corn rootworm beetles is covered in this publication.  More...
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alternate text here Product Code: E-79-W
This publication describes the insect and the type of damage they do. It also discusses control measures including a list of insecticides.  More...
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alternate text here Product Code: E-31-W
This publication describes the habits of and damaged caused by corn earworm. It also suggests methods for control in commercial sweet corn plantings, home gardens and seed corn.  More...
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alternate text here Product Code: E-97-W
Fresh market tomatoes can withstand considerable feeding on the leaves, but very little insect damage directly to the fruit. Fortunately, there are few insect pests in Indiana that seriously damage tomato fruit.  More...
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alternate text here Product Code: BP-79-W
Rust diseases of wheat can limit yields in Indiana, especially in susceptible varieties. Early detection and proper identification of rusts are critical for in-season disease management and variety selection. This public  More...
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alternate text here Product Code: AS-598-W
Mycotoxins in corn and other grains can reduce performance in both ruminants (cattle, sheep, goats) and non-ruminants (swine, poultry) and can have detrimental effects on both finishing animals and reproducing males and  More...
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alternate text here Product Code: BP-77-W
Gibberella ear rot, or Gib ear rot, can occur throughout Indiana, but it tends to be more prevalent in the northern half of the state. This publication describes how to recognize and identify the disease, its danger to a  More...
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alternate text here Product Code: AS-597-W
During the 2009 Indiana corn harvest, livestock producers heard numerous reports of mycotoxin levels high enough to cause concern. The main mycotoxins in feed grains that sheep and meat goat producers need to be concerne  More...
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alternate text here Product Code: BP-75-W
Diplodia ear rot has become a common and troublesome fungal disease on Indiana corn, particularly in reduced tillage and continuous corn situations. This bulletin describes how to recognize the disease, minimize losses,  More...
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alternate text here Product Code: WS-37

Several plants in our pastures can be toxic to horses and cattle. The best way to assure that forage is as safe as possible is to keep these plants out of your fields and pastures. Doing this, requires proper weed i  More...

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As its name suggests, the first thing you may notice about giant hogweed is its stature. When it flowers, the plant can reach a height of 10 to 15 ft.  More...
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alternate text here Product Code: WS-30-W
Kudzu (Pueraria montana) is as close to a celebrity that a plant can become. Is has become part of the culture in the southern United States. It's so popular that it has been referred to in the names of music bands, spor  More...
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alternate text here Product Code: WS-31-W
The spring is often synonymous with "burndown" to producers in Indiana. Around this time we sometimes get the question, "what is the difference between amine and ester formulations of 2,4-D?" This is a good question for  More...
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alternate text here Product Code: WS-29-W
Horsetail (also called "scouring rush", "marestail", "horse pipes", "jointed monkey grass", or "snake grass") are quite common if you know where to look. This publication examines horsetail's biology and provides recomme  More...
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alternate text here Product Code: BP-131-W
Frogeye leaf spot is an important foliar disease in hot, humid regions of the United States. The most common initial symptoms are small, yellow spots on the leaves that eventually enlarge to a diameter of about 1/4 inch.  More...
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alternate text here Product Code: FNR-267
Given the economic and social importance of both wildlife-related activities and agriculture in Indiana, it is critical that we balance the relationship between wildlife species and agricultural production in order to me  More...
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alternate text here Product Code: FNR-265-W
wildlife damage to field crops is a widespread concern, and the control of wildlife damage to crops is an important component of wildlife management. But given the economic and social importance of both agriculture and  More...
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alternate text here Product Code: WS-34-W
Dodder is a unique plant because it is a true obligate parasite. Also, dodder does not have any leaves nor any chlorophyll to produce its own food. This publication takes a closer look at dodder and control options.  More...
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alternate text here Product Code: BP-41-W
Brown stem rot is considered a minor disease problem in the North Central Region, but in severely infected soybean plantings it can cause up to 30 percent yield loss. This publication examines the symptoms and disease cy  More...
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alternate text here Product Code: BP-130-W
Root knot nematodes cause major damage in soybean in the southern United States, and are a notorious problem because of their wide host range. This publication examines the symptoms or root knot nematode damage, how nema  More...
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alternate text here Product Code: BP-47-W
This publication discusses mycotoxins, aflatoxin, deoxynivalenol, zearalenone fumonisin, sampling, and mycotoxin analysis kits. Illustrations are provided showing a neogen test kit and vicam test kit.  More...
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alternate text here Product Code: WS-26-W
The accuracy of identifying a plant from digital images is dependent on the information captured in the images. The better the image, the better the diagnosis. Certain plant features are necessary for species identificat  More...
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alternate text here Product Code: WS-27-W
The accuracy of identifying a plant from digital images is dependent on the information captured in the images. The better the image, the better the diagnosis. Certain plant features are necessary for species identificat  More...
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alternate text here Product Code: GQ-26-W
This one-page publication entitled, "Vomitoxin in Feed Wheat for Hogs" discusses vomitoxin and how it has caused the 1996 wheat crop to be diverted from human food to animal feed. Vomitoxin causes feed refusal and poo  More...
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alternate text here Product Code: CL-1-W
This one-page publication entitled, "Head Scab of Wheat" deals with gibberella, the cause of head scab in wheat. Deoxynivalenol and zearalenone are two mycotoxins possibly produced by head scab. Feeding scabby wheat  More...
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alternate text here Product Code: BP-49-W
This publication discusses fungus that causes blue eye in corn and how to control it.  More...
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alternate text here Product Code: GQ-18-W
This one-page publication entitled, "Blue Eye in Corn" discusses a type of germ discoloration. Blue eye in corn is usually due to fungi in the germ tissue. Occuring during harvest, blue eye indicates that grain has be  More...
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alternate text here Product Code: GQ-13-W
This grain quality fact sheet has information about infestation, prevention, and control of moderate infestation of grain mites.  More...
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alternate text here Product Code: FNR-136-W
The electric fencing systems described in this publication have been proven to be effective in reducing deer damage to grain crops and trees in Indiana. The publication discusses types of electric fences, construction  More...
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alternate text here Product Code: GQ-2-W
This grain quality fact sheet has information about identifying Gib ear rot, its danger to animals, and its effects on harvest and storage.  More...
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alternate text here Product Code: AY-230-W
Discusses the effects of rotating crops on crop yields, soil fertility, insects, weeds, and diseases. Provides suggestions for making the right decisions under alternative tillage systems.  More...
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