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.

First Iowa Confirmation of Resistance to Bt Corn by Western Corn Rootworm

December 22, 2011
Western Corn Rootworm adults

While the number of fields with resistance to Cry3Bb1 corn is small at this time in Iowa, it should be noted that similar damage has been reported in other states. Research highlights the importance of incorporating integrated pest management and insect resistance management into field crop production.

A 10-Year Summary of Testing for Nematodes that Feed on Corn in Iowa

December 7, 2011
Number of samples submitted to the ISU Plant and Insect Diagnostic Clinic from corn fields to be tested for plant-parasitic nematodes from 2000 to 2010, by county

The availability of new products to manage plant-parasitic nematodes that feed on corn has increased the interest in the occurrence of these pests in Iowa. The results of testing for nematodes that feed on corn in Iowa from 2000 through 2010 were recently summarized and the main findings are contained in this article.

Subsoil Moisture Levels a Concern for Northwest Iowa 2012 Crops

December 7, 2011
County Subsoil moisture - Fall 2011

The northwest Iowa fall survey of subsoil moisture completed by Iowa State University in November shows well below average amount of subsoil moisture. Subsoil moisture levels are checked in the fall in many northwest Iowa counties through this survey.

New Stink Bug Identification Card Available

December 5, 2011
Stink Bugs of the Midwest cover

By Laura Jess, Plant and Insect Diagnostic Clinic and Erin Hodgson, Department of Entomology

A new, pocket-sized identification card for stink bugs in the Midwest will make identification of these insects much handier. Iowa State University Extension has just released the new identification card from authors Laura Jesse, Erin Hodgson, Donald Lewis, Matt O’Neal and Adam Sisson. The card was made possible with funding from a 2011 North Central IPM Center mini-grant.

Management Considerations for Post Flooding Soils

November 7, 2011

Farmland in western Iowa and eastern Nebraska affected by flooding early this year and not planted to any crop has potential economic and soil environmental consequences if the soils are left unattended.

Anhydrous Ammonia Application and Dry Soils

October 28, 2011

It is almost time that anhydrous ammonia (NH3) applications could begin, however, many soils in Iowa are quite dry this fall. So, can anhydrous ammonia be applied to dry soil? Will it be held in dry soil?