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.

Degree Days Continue to Lag

July 1, 2008

By Rich Pope, Department of Plant Pathology

Another week of slightly cool days with scattered storms has Iowa farmers facing uneven stands in many fields. Cumulative heat during the week of June 23 lagged behind long term averages by 10 to 25 degree days in Iowa. The cool temperatures and still wet soils provide stresses to struggling crops, and those stresses are showing up in poor growth.  As we get more heat the corn and soybean should recover, but this early summer has predisposed the crops to future stresses. Read more about Degree Days Continue to Lag

Pre-harvest Intervals for Foliar Fungicides on Wheat

July 1, 2008

By Daren Mueller, Department of Plant Pathology

EPA has notified the Iowa Department of Agriculture and Land Stewardship that some problems with compliance with pre-harvest intervals for fungicides applied to wheat in Kansas were discovered this year. Some wheat was embargoed until tests could be completed to determine residue levels. Although Iowa has a small number of wheat acres compared with Kansas and other nearby states, pesticide applicators and growers should check the pre-harvest intervals (PHIs) for any wheat fungicides that have been applied. Read more about Pre-harvest Intervals for Foliar Fungicides on Wheat

Flooding and Stored Grain

June 24, 2008

By Charles Hurburgh, Department of Agricultural and Biosystems Engineering and Dan Loy, Department of Animal Science

 

Floodwaters have soaked many grain bins on farms and at commercial elevators. With only a few exceptions, flood soaked grain is not useable for feed or food. Flooding affects both the stored grain and the storage structures.

Grain and Grain Products Read more about Flooding and Stored Grain

A Cool and Thankfully Dry Week

June 23, 2008

By Rich Pope, Department of Plant Pathology

Some good news this week, with much-needed access to fields gained across Iowa. Also on the positive side, hay harvest progressed rapidly and hay yields were reportedly good.

Although the week was a bit cooler than average, the dry weather was a welcome relief.

Degree day accumulations by Crop Reporting District Read more about A Cool and Thankfully Dry Week

Is It Time to Switch Soybean Maturity Group Varieties?

June 21, 2008

By Palle Pedersen, Department of Agronomy

Many farmers were able to get back into the field this week and start finishing up planting. However, there are still many areas where fields remain flooded and it will take awhile before we can get back in and replant. Some fields need to be replanted and some don’t. It is important to accurately estimate a surviving stand and then evaluate the economics of replanting. Read more about Is It Time to Switch Soybean Maturity Group Varieties?

Flooding and Mosquitoes

June 20, 2008

By Laura Jesse, ISU Plant and Insect Diagnostic Clinic

Flooding per se, does not lead to mosquitoes. It is the water that stands AFTER the flooding that creates opportunities for mosquitoes to breed. Heavy, frequent rainfall may lower mosquito population numbers because there is no standing, stagnant water in which the larvae can feed on grow (mosquito larvae do not live in running water). Read more about Flooding and Mosquitoes

Pages