Integrated Crop Management News

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Tips for Diagnosing Goss's Wilt and Leaf Blight

June 28, 2012
Characterisitic freckles for Goss's wilt and leaf blight

By Alison Robertson, Department of Plant Pathology and Microbiology


 


In the past 5 years, Goss’s wilt and leaf blight has become increasingly prevalent in Iowa. This growing season, the disease has already been reported from several fields. Consequently many agronomists and scouts have been checking fields and some agronomists have been making use of the immunostrip test from AgDia.


 


What symptoms should you be looking for?

Western Bean Cutworm Scouting Update 2012

June 26, 2012
May 1-21 accumulated DDs and normals used to predict 25% and 50% W. bean cutworm adult emergence

Now that western bean cutworm moths have been reported in Iowa, producers should review county trap data to determine the need to scout a location.

It's a No-win Situation: Large Weeds and Hot, Dry Weather

June 26, 2012

Weeds have survived early-season control tactics this year, and many producers want to take action. But many rescue treatment have little chance of providing effective control. Carefully evaluate the risks with applications made at this time and use this year's experiences to develop a more consistent weed control program for next year.

Care with Plant Nutrient Analysis

June 22, 2012
Relationships between relative corn yield response to P and K fertilization and the nutrient concentration of small plants or leaves

Producers may wonder whether plant growth is affected by nutrient deficiency or if climatic and soil factors are causing the problem. This article summarizes key points to consider with plant analysis.

Soybean Response to Drought

June 22, 2012

By Andy Lenssen, Department of Agronomy

Although drought typically is an infrequent occurrence in Iowa, 2012 has been an exception to the rule. Winter, spring and early summer precipitation has been below long-term average, and soybeans in some areas of the state are experiencing periodic water stress due to inadequate available water content in upper soil depths. Farmers have asked whether drought stress early in the season can influence yield if precipitation levels approach long-term average later in the season. 

Should you be scouting for Goss's wilt?

June 12, 2012
Typical Goss's leaf blight symptoms on corn

Goss's wilt was found recently on plants in Iowa and Nebraska. If you are scouting for Goss's wilt, focus your attention on fields that are planted to susceptible hybrids, have a history of the disease, have surface corn residue, and have been recently injured by sever weather.

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