Integrated Crop Management News

Links to these articles are strongly encouraged. Articles may be republished without further permission if published as written and if credit is given to the author, Integrated Crop Management News, and Iowa State University Extension and Outreach. If articles are used in any other manner, permission from the author is required.

Consultants Now Required for Aerial Pesticide Applicators

April 22, 2009

By Kristine J. P. Schaefer, Pest Management and the Environment

There continues to be changes regarding pesticide application in Iowa. The April 5 ICM News article discussed changes in pesticide record-keeping requirements and the Iowa Bee Rule. Today’s article addresses an additional requirement concerning aerial application of pesticides.

Take Note of Soil Temperature

April 22, 2009
Graph of temperature and the days to crop emergence

Current soil temperatures, important to germination and the fate of nitrogen, are tracked on an ISU Extension website.

April 20 Iowa Crop and Weather Report

April 22, 2009

By Doug Cooper, Extension Communications and External Relations

Doug Cooper's April 20 crop and weather report guests this week are Extension climatologist Elwynn Taylor, integrated pest management specialist Rich Pope and soybean agronomist Palle Pedersen.

Taylor talks of La Niña's continued comeback having reached the SOI category, considered a significant weather phenomenon. Planting weather looks good for Iowa the next couple of weeks, but the Eastern Corn Belt may not be as fortunate.

Corn Planting Begins

April 22, 2009
Graph of Iowa corn planting progress 2004-2008

By Roger Elmore and Lori Abendroth, Department of Agronomy 


As of Sunday, April 19, six percent of Iowa's corn  sits in Iowa's fields imbibing moisture and experiencing the beginning of the germination process. In our planting date research trials, corn planted during the first week of April has sprouted with a one-fourth inch root emerged.  The season begins!


Early Planting and Soybean Disease Considerations

April 21, 2009

by XB Yang, Department of Plant Pathology

Blessed by good weather, crop planting in Iowa has begun smoothly.  During the April 20 crop teleconference, Extension field agronomists reported good progress of corn planting and some soybean plantings before April 20 around Iowa. With the current weather outlook favorable for spring planting, many soybean fields are likely to be planted early (before the end of the first week of May).

Alfalfa Weevil Hatch is Upon Us

April 20, 2009
Image of projected degree days Jan. 1 through April 15, 2009 and predicted hatch date in Iowan regions

By Rich Pope, Corn and Soybean Initiative and Jon Tollefson, Department of Entomology


The map below indicates the accumulated degree days for each of the nine Iowa crop reporting districts. Degree-day information indicates that alfalfa weevil larvae should be hatching this week in southern Iowa. In central Iowa counties, weevils should be hatching by the third week of April; and in northern Iowa, weevils should hatch the last full week of April. That means that fields in southern Iowa should be scouted now.

A 2009 Prediction for Stewart's Disease of Corn

April 15, 2009
Stevens-Boewe Index 2009 in Iowa

Corn flea beetles must survive Iowa's cold winter months in order to spread bacterium that causes Stewart's disease of corn. Learn what the chances are that they survived.

April 13 Crops and Weather Report

April 14, 2009

On April 13, Doug Cooper , Extension communications specialist, interviewed Iowa State University Extension climatologist Elwynn Taylor, integrated pest management specialist Rich Pope and corn agronomist Roger Elmore for the weekly crops and weather update.

Extension climatologist Elwynn Taylor tells Cooper that La Niña appears to be making a comeback, maybe. The Southern Oscillation Index (SOI) has gained back some of its strength the past week or so.

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