Integrated Crop Management News

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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.

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.  

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.

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.

Degree Days - A Warm Start to Summer

June 24, 2009
Image of base 50 degree F degree days in regions of Iowa from May 1 to June 21, 2009

By Rich Pope, Department of Plant Pathology

Iowa weather took a turn to the warmer in mid June. Although uneven corn stands are still easy to find, particularly in corn following corn, the warm days have allowed plants to green up and make up in development.

accumulated degree days in Iowa since May 1 2009

June 22 Iowa Crop and Weather Report

June 24, 2009

By Doug Cooper, Extension Communications

Iowa State University Extension climatologist Elwynn Taylor returns to the weekly crop and weather report this week. Taylor is joined by integrated pest management specialist Rich Pope and corn agronomist Roger Elmore for this week's roundtable discussion on the 2009 growing season.

Soybean Aphids Are Found in Young Soybean

June 24, 2009
Graph of soybean aphid populations below economic threshold

Scouting early in the season may help prevent yield loss from soybean aphids. The aphids are being reported in young soybeans throughout the North Central Region.

Hail Injury on Corn

June 19, 2009
Image of a hail damaged corn field

By Roger W. Elmore and Lori Abendroth, Department of Agronomy

Hail pounded various parts of Iowa over the last two weeks. Storm systems continue to march aggressively across the state. Shredded, twisted corn lies in their paths (Figure 1). Corn across the state ranges from 6th to perhaps the 10th leaf stage. That means that corn growing points extend above the ground. Damage to the growing point compromises recovery and yield.

Cornfield

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