Integrated Crop Management News

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July 6 Crop and Weather Report

July 7, 2009

By Doug Cooper, Extension Communications

Highlights of the weekly Iowa State University Extension crop and weather report with Doug Cooper, extension communications specialist.

Extension climatologist Elwynn Taylor says weather conditions should favor corn and soybean during the next 10 to 14 days. The Southern Oscillation Index (SOI) continues to move toward a return to La Niña.

Decision for Fungicide Applications on Corn Looming

July 6, 2009
Table of yield response to a foliar application of a strobilurin fungicide

Research determining yield response to fungicide application in corn differs between university and industry, but they do agree that yield response is greater when significant disease pressure is present.

Signs of Crazy Top in Corn

July 6, 2009
Image of crazy top in corn

Causes and management of crazy top that is appearing in Iowa corn fields is discussed by plant pathologists.

Foliar Fertilization of Corn and Soybean

July 1, 2009
Image of iron chlorosis symptoms in soybean

Corn and soybean take up a large amount of nutrients during growing season, amounts that are not adequately addressed by low foliar fertilization rate.

June 29 Iowa Crop & Weather Report

June 30, 2009

By Doug Cooper, Extension Communications

Listen to Doug Cooper, Extension communications specialist, as he interviews Iowa State University Extension climatologist Elwynn Taylor, integrated pest management specialist Rich Pope, and sybean agronomist Palle Pedersen.

During the weekly interview, Taylor says hot humid temperatures should be behind us for a few weeks with a return to cooler and drier weather.

Pope talks about this year's pesky weed - volunteer corn — and how it is presenting a problem for many corn and soybean producers.

Degree Days - More Heat and Humidity with Bigger Weeds

June 30, 2009
Image of base 50 degree F degree days in regions of Iowa from May 1 to June 28, 2009

By Rich Pope, Department of Plant Pathology


Summer burst through the doors with a blast of heat and humidity. Although oppressive to people, it allowed for rapid growth of both crops and weeds.  Weeds are a considerable concern in most areas, most notably where pre-plant burn downs were skipped, and where spraying has been prevented by wet fields. Most areas of Iowa gained 20 to 25 degree days more than the average mid-June week.  


Is It Japanese Beetle in the Field or Something Else

June 30, 2009
Image of Japanese beetle grub

Adult Japanese beetles emerge from the soil in June to eat a variety of foods - including foliage. While they rarely cause economic damage to field crops, they can cause aesthetic damage to ornamental plants and fruit trees.

Crop Management Clinic Features Over 20 Topics

June 29, 2009
Multiple attachments image

ISU Extension's 43-acre teaching and demonstration facility, Field Extension Education Laboratory (FEEL), will be the setting for this intensive two-day training program.

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