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.

Possible Breakdown of SCN Resistance Topic of New Webcast

July 28, 2012
SCN females on roots of SCN resistant soybean

Since the early 1990s, almost all soybean varieties resistant to the soybean cyst nematode (SCN) have had the same resistance genes, from a breeding line called PI 88788. As a result, SCN populations have developed increased reproduction on PI 88788. Some have said that PI 88788 SCN resistance is "failing"; Iowa State University data obtained with soybean checkoff funding indicate otherwise. A new webcast describes the situation and discusses the results of numerous field experiments conducted in Iowa illustrating the effects of elevated SCN reproduction on yield of SCN-resistant soybean varieties.

ISU Extension and Outreach to Host Central Iowa Corn Stover Harvest Meeting

July 25, 2012

New opportunities exist for harvesting corn stover around the Nevada, Iowa, region to support the biomass feedstock needs of a cellulosic ethanol plant. To address these emerging opportunities, a Corn Stover Harvest Meeting has been scheduled for Aug. 15, 2012 starting at 1 p.m. at the Story County Extension Office in Nevada.

Symptoms of SCN Damage Apparent Early, Yield Loss Likely Great in 2012

July 23, 2012
Mid yellowing and stunting of plants caused by SCN

The soybean cyst nematode (SCN) is widely considered to be one of the most damaging soybean pathogens in Iowa every year. Damage from SCN is usually much greater when soil moisture is limiting. The early onset of stunting and yellowing caused by SCN damage in Iowa this season seems to indicate that yield loss to this pathogen is going to be significant - perhaps even on SCN-resistant soybean varieties.

Webinar Examines Livestock and Crop Options During Drought

July 22, 2012

Roger Elmore and Extension Field Agronomists, Department of Agronomy

Iowa crop and livestock producers dealing with drought—related issues are invited to attend an Iowa State University Extension and Outreach webinar Wednesday, July 25 to learn more about options available to them. County extension offices will be hosting the 1- 3 p.m. webinar. There is no charge to attend the webinar.

Soybean Potential in Drought Conditions

July 20, 2012

By Andy Lenssen, Department of Agronomy

Farmers and non-farmers alike are asking the questions, "What is going to happen to soybeans this year? What level of yield can we expect?" Given the lack of rain in Iowa and much of the U.S. soybean belt, current prices and high demand, these are legitimate questions. 

ISU Extension and Outreach Offers Iowa Drainage School

July 19, 2012

Drainage systems that are properly designed and operating are essential to achieving excellent agricultural production capability. Producers and others interested in this topic can learn more at the Iowa Drainage School August 21-23.