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Purdue Extension

Crops - Corn

alternate text here Product Code: AY-364-W

In recent years, high-clearance fertilizer application equipment make it feasible to apply nitrogen (N) fertilizer to corn later in the growing season. This publication explores the potential uses of late-season N app  More...

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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-0002-15-W

This publication summarizes the effort and impacts that the Crop Protection Network had in 2015.

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alternate text here Product Code: CPN-0002-16-W

This publication summarizes the efforts and impacts that the Crop Protection Network had in 2016.

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alternate text here Product Code: ID-179SP-APP

This is a free preview of our new in-field reference that takes the popular Corn & Soybean Field Guide to the next level. Purdue University specialists created a comprehensive, science-based app to help you effectivel  More...
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alternate text here Product Code: CPN-0001-W

This publication outlines the purpose and mission of the Crop Protection Network, a multi-state and international collaboration of university and provincial extension specialists and public and private professionals w  More...

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alternate text here Product Code: ID-179C-APP

This is the perfect in-field reference that takes the popular Corn and Soybean Field Guide to the next level. Purdue University specialists created this comprehensive, science-based app to help you effectively manage  More...
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alternate text here Product Code: ID-179S-APP

This is the perfect in-field reference that takes the popular Corn & Soybean Field Guide to the next level. Purdue University specialists created a comprehensive, science-based app to help you effectively manage soybe  More...
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alternate text here Product Code: ID-179CP-APP

This is a free preview of our new in-field reference that takes the popular Corn & Soybean Field Guide to the next level. Purdue University specialists created a comprehensive, science-based app to help you effectivel  More...
$0.00 at the App Store

alternate text here Product Code: ID-179C-APP-A

This is the perfect in-field reference that takes the popular Corn & Soybean Field Guide to the next level. Purdue University specialists created this comprehensive, science-based app to help you effectively manage co  More...
$5.99 at the App Store

alternate text here Product Code: ID-179CP-APP-A

This is a free preview of our new in-field reference that takes the popular Corn & Soybean Field Guide to the next level. Purdue University specialists created a comprehensive, science-based app to help you effectivel  More...
$0.00 at the App Store

alternate text here Product Code: ID-179SP-APP-A

This is a free preview of our new in-field reference that takes the popular Corn & Soybean Field Guide to the next level. Purdue University specialists created a comprehensive, science-based app to help you effective  More...
$0.00 at the App Store

alternate text here Product Code: ID-179S-APP-A

This is the perfect in-field reference that takes the popular Corn & Soybean Field Guide to the next level. Purdue University specialists created a comprehensive, science-based app to help you effectively manage soybe  More...
$5.99 at the App Store

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: BP-160-W
This publication provides a table that includes the most widely marketed fungicide products to control common diseases in corn. It was updated in January 2017.

Format: PDF.

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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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alternate text here Product Code: CPN-4002-25PK

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...

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: ID-179-25BX

This is a box of 25 copies of our popular in-field reference. This year's guide provides detailed and descriptive information for corn and soybean producers. Topics include identifying and managing insect, disease, an  More...

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$202.50
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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: 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: CPN-4001

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: 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: 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: BP-199
This book, published by the American Phytopathological Society (APS), provides the images, tools, and non-technical guidance to help ag professionals accurately diagnose corn diseases and disorders found in the fields of  More...

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$29.95
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alternate text here Product Code: BP-200
This book, published by the American Phytopathological Society (APS), provides the images, tools, and non-technical guidance to help ag professionals accurately diagnose soybean diseases and disorders found in the fields  More...

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$29.95
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alternate text here Product Code: BP-90-W

Tar spot of corn was first confirmed in the United States in 2015. Our knowledge of the impact that tar spot could have on U.S. corn production is limited, but it is important to understand how to identify the diseas  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: ID-179

This pocket-size, in-field reference provides detailed and descriptive information for corn and soybean producers. Topics include identifying and managing insect, disease, and weeds; diagnosing herbicide injuries; soi  More...

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$9.00
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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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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-88-W

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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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: ID-463-W
New records were set for yield and production in 2014, a good year for popcorn in Indiana. In 2014, 91,000 acres of popcorn were planted in Indiana, up 10,000 acres from 2013. A total of 90,000 acres were harvested, also  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: AS-622-WV
This video addresses the issue of using stressed corn in a drought as feed for cattle. The problems/challenges such as the high nitrate levels are addressed. Silage vs Greenchop is addressed. introducing high nitrate  More...
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alternate text here Product Code: AS-621-WV
Alternative forage and nitrates are discussed - precautions and making silage. Opportunities and precautions when looking to alternate ways to feed cattle. Safety in feeding cattle high nitrate feed is discussed.

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alternate text here Product Code: ID-179-APP
This is the iPad app version of the popular pocket-size guide. This comprehensive, science-based app provides a range of information to help you effectively manage corn and soybean production. If you have ever used the p  More...
$12.99 at the App Store
alternate text here Product Code: ID-455
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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$19.00
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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: AY-335-W
For many years, N recommendations in the Midwest were based on achieving a specific corn yield goal (if you want so many bushels per acre, apply so much N). This began to change in 2006. As growers consider adopting thes  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: 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: BP-82-W
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: BP-56-W
Since the mid-1990s ray leaf spot has become the one of the most important foliar diseases of corn in Indiana. This publication describes how to correctly identify the disease, conditions that favor disease development,  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-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.

Format: PDF.

Pages: 2.  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-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: 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: AY-329-W
This publication presents research that shows how plant height uniformity influences yield in continuous corn using conservation tillage systems. This publication discusses some real causes of yield loss in no-till corn  More...
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alternate text here Product Code: GWC-12
Giant ragweed is one of the most common and problematic weeds in corn and soybean production in the eastern Corn Belt. With the development of herbicide resistance in many giant ragweed poplulations, the number of effec  More...

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$3.00
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alternate text here Product Code: ID-328
4-page publication explaining how fuel ethanol is made from corn and outlining some of the challenges and opportunities this presents.  More...
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alternate text here Product Code: ID-329
4-page publication describing the effects of ethanol production on grain transportation and storage, including near and longer term adjustments and effects on inbound and outbound transportation of corn and on grain elev  More...
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alternate text here Product Code: ID-336
4-page publication explaining the consequences of and compromises involved in planting more corn after corn for ethanol production.  More...
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alternate text here Product Code: WQ-44-W
This 8-page publication answers 27 frequently asked questions about drainage water management for Midwest corn and soybean cropping systems. Drainage water management is one strategy to reduce the nitrate loads in draina  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: SPS-100-W
Soybean relies on a specific species of bacteria, Bradyrhizobium japonicum, to fix atmospheric nitrogen. This publication explores how this symbiotic relationship works and how inoculating these microbes can affect soybe  More...
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alternate text here Product Code: CD-AY-S1
This four-CD series includes Soybean Growth, Development and Diagnostics (CD-AY-4); Corn Growth, Development and Diagnostics: Germin  More...

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$75.00
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alternate text here Product Code: AY-269-W
This publication shows corn and soybean producers who use conservation tillage methods how they can estimate and manage crop residue cover.  More...
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alternate text here Product Code: AY-322-W

Studies have demonstrated that the nitrogen (N) status of a corn crop can be determined by measuring the nitrate concentrations in the lower portions of cornstalks at the end of the growing season. Evaluation of the t  More...

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alternate text here Product Code: AY-9-32-W
This publication discusses common fertilizer recommendations for the major crops in the tri-state region.  More...
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alternate text here Product Code: AY-317-W

Getting the correct amount of Nitrogen needed for optimal corn yields can be difficult. However, using a chlorophyll meter can help determine the amount of Nitrogen a corn plant has been able to accumulate. This publi  More...

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alternate text here Product Code: AY-314-W

Nitrogen fertilizer is essential for profitable corn yields, but is also a major production cost and can contribute to environmental degradation. This publication provides information about soil nitrate tests, collect  More...

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alternate text here Product Code: AY-264-W
The purpose of this publication is to assist you in making that important corn replant decision. It allows you to determine your damaged field's current yield potential, its replant yield potential, and the dollar ret  More...
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alternate text here Product Code: EC-714
Specialty grains and oilseeds have a long tradition as part of Indiana's crop mix. This publication addresses questions such as the number of acres devoted to specialty grains in Indiana, the differences in growing speci  More...
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alternate text here Product Code: CD-AY-2
This CD is a comprehensive multimedia coverage (color photos, sound, video) of diseases, herbicide injury, insects, nutrient deficiency, and other damage factors affecting corn from knee high through maturity. This CD  More...

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$25.00
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alternate text here Product Code: CD-AY-1A
This CD is a comprehensive multimedia (hundreds of color photos plus digital sound and video) coverage of diseases, herbicide injury, insects, nutrient deficiency and other damage factors affecting corn from germination  More...

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$25.00
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alternate text here Product Code: AY-225-W
Typical scale of price discounts currently used by local and terminal elevators and processors in Indiana.  More...
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alternate text here Product Code: GQ-30-W
This nine-page publication entitled, "Low-Temperature Drying of Corn In Southwestern Indiana" discusses a variety of topics. Low temperature drying, how to maximize capacity, recommendations, and tables are also covere  More...
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alternate text here Product Code: GQ-20-W
This two-page publication entitled, "Slow Versus Fast Low-Temperature Bin Drying of Corn" discusses the guidelines and statics on low- and high-temperature in bin drying. This fact sheet provides recommendations for 1  More...
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alternate text here Product Code: GQ-29-W
This three-page publication entitled, "Ear Corn Drying, Storage and Handling" uses a fact sheet to summarize items such as naturally ventilated ear corn cribs. Natural and heated air drying and fan selection and airfl  More...
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alternate text here Product Code: GQ-27-W
This eight-page publication entitled, "Harvesting, Drying, and Storing Frost-Damaged Corn and Soybeans" discusses frost damage. How far along the plant was when frost occurred reflects on how best to treat the corn and  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-23-W
This three-page publication entitled, "Quality Grain Needs TLC" covers breeding efforts and how they continue to increase. Specific traits have been genetically altered for certain purposes including snack food manuf  More...
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alternate text here Product Code: GQ-17-W
This three-page publication entitled, "Rewarming 'Supercold' Grain" discusses how some farmers attempted to "freeze" corn to improve its keeping quality through spring and summer. To avoid spoilage and mold, it is nec  More...
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alternate text here Product Code: GQ-10-W
This grain quality fact sheet has the results of a survey conducted by the Grain Quality Task Force in March 1993 to survey stored corn moving from farms to elevators.  More...
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alternate text here Product Code: NCH-58-W
This publication discusses identification of drought stress and its effect on corn growth and yield, possible revenue sources if you are affected by drought, utilizing drought-stressed corn, switching to another crop,  More...
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alternate text here Product Code: GQ-9-W
This grain quality fact sheet has information about applying for 1992 disaster assistance for low quality corn grown in the Midwest.  More...
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alternate text here Product Code: NCH-1-W
This publication discusses when corn is most susceptible to hail damage, determining yield loss due to stand reduction and defoliation, determining direct ear damage, bruising and stalk damage, and estimating total yie  More...
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alternate text here Product Code: GQ-7-W
This grain quality fact sheet discusses problems caused by in-bin dryers, column dryers, and holding wet corn without drying. It also offers solutions to counteract deteriorating grain and provides important safety p  More...
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alternate text here Product Code: GQ-6-W
This grain quality fact sheet has information about safe storage temperatures, aeration cooling time, turning the fan off and additional management tips.  More...
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alternate text here Product Code: GQ-5-W
This grain quality fact sheet explains low-temperature drying and how to maximize the capacity of low-temperature drying systems. It also has an appendix that discusses how to use the recommendations, and includes ex  More...
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alternate text here Product Code: GQ-4-W
This grain quality fact sheet discusses the potential danger to horses in the 1991 carryover corn.  More...
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alternate text here Product Code: GQ-3-W
In a normal year, many farmers like to wait until the moisture content is at least below 28% before beginning harvest. The field moisture content continues to decrease during the fall. This publication shows the approxim  More...
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alternate text here Product Code: GQ-1-W
This grain quality fact sheet has information about preparing for fall harvest, including establishing a harvest strategy, determining crop drying needs, and maintaining a good storage management routine.  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: NCH-36-W
This publication discusses why corn emerges unevenly, describes research that measured how much uneven emergence reduces corn yields, provides recommendations for managing uneven emerging stands, and gives suggestions  More...
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alternate text here Product Code: NCH-61-W
This publication describes several popular pencil shrink methods, provides examples of their calculations, and discusses the use of shrinkage as a basis for evaluating custom drying and grain sale alternatives. Tables  More...
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alternate text here Product Code: AE-91-W
A seven-page publication giving guidelines for storing corn outdoors. Aeration information and other considerations and precautions presented together with schematics.  More...
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alternate text here Product Code: NCH-18-W
This publication discusses moisture stress, stress during various corn growth stages, and suggestions pertaining to weather stress.  More...
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alternate text here Product Code: NCH-46-W
This publication discusses the essential elements, definition, use, soil testing, limitations, and interpretation of plant analysis. Tables are included listing the critical nutrient values or sufficiency ranges for co  More...
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alternate text here Product Code: NCH-57-W
This publication discusses conditions conducive to frost damage, the effect of frost damage on grain development and yield, handling the damaged corn, and reducing the risk of frost damage. Tables are included listing  More...
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alternate text here Product Code: NCH-40-W
This publication discusses growing season characteristics and requirements in the corn belt, including precipitation requirements and illustrations. Tables are also included listing field corn hybrid maturity classificat  More...
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alternate text here Product Code: NCH-43-W
This publication discusses the genetics and breeding, environmental conditions, mineral nutrition, weeds, insects, diseases, nematodes, and harvesting and handling of sweet corn. Tables are included listing the relati  More...
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alternate text here Product Code: NCH-5-W
This publication presents an overview of popcorn production practices for both commercial and home use purposes and includes management involved in growing, harvesting, conditioning, storing, and marketing.  More...
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alternate text here Product Code: AY-262-W
The objectives of this publication are 1) to describe the relationship between plant stress, plant sugars, and stalk rot, 2) to provide the producer with preventive management options to help minimize the risk of stalk  More...
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alternate text here Product Code: NCH-49-W
This publication discusses when to harvest, harvest management, and harvest technique. Tables are included listing the influence of corn hybrid maturity group and harvest date on the yield and percent moisture when har  More...
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alternate text here Product Code: NCH-23
This publication discusses the likely effects of drainage improvements, the yield value of those improvements, the factors determining the economics of drainage, and how to calculate returns to a drainage investment. T  More...
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alternate text here Product Code: AE-107-W
Deals with the planning, operation and management of dryeration and bin cooling systems on individual farms, as opposed to country and terminal elevator installments.  More...
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alternate text here Product Code: AE-106-W
Presents data and tables for determining the air flow, system performance and energy relationships in bin drying and cooling.  More...
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