ISU Extension News

New Site Gives Midwest Farmers Easy Access to Crop Management Resources

Farmers and agribusiness have a new tool to help them tackle crop management challenges. The Crop Protection Network, a multi-state and international collaboration of university and provincial extension specialists, has redesigned its website at www.cropprotectionnetwork.org. In addition to the corn and soybean publications it is known for, the site now offers videos, newsletter and blog articles, featured…

Downwind Buffers and Susceptible Crop Restrictions for New Dicamba Products

In response to problems with off-target movement and injury associated with dicamba applications on dicamba-resistant (Xtend) soybean, the EPA made significant changes to labels of the new dicamba products.  While much of the discussion has focused on the Restricted Use designation and the requirement for applicators to receive dicamba-specific training, the EPA also clarified how…

New Dicamba Labels Issued

ICM News In October 2017, the Environmental Protection Agency reclassified Engenia®, FeXapan™ herbicide Plus VaporGrip® Technology, and Xtendimax® With VaporGrip® Technology as Restricted Use products and added additional restrictions and requirements to their use. One of the additional requirements stated that anyone wishing to apply these products must attend a dicamba or auxin-specific training. Recently,…

High yields despite drought conditions

Most of Iowa was wet and cool during planting time (end April to mid-May), warm and dry during vegetative growth (June to July), and cool and wet during reproductive development (August to September). In some locations, the June-July drought was severe with precipitation deficits exceeding eight inches. Despite this drought, yields were high and above…

Identification, biology and management of Colorado potato beetle

This year, I’ve had a handful of people ask me about managing Colorado potato beetle (CPB) in Iowa. Read more about CPB identification and biology here. These conversations were with producers growing over 5 acres of potatoes and having a difficult time reducing CPB pressure. With the help of Dr. Ian MacRae at the University of Minnesota, I…

A historical perspective on dicamba

At the recent North Central Weed Science Society annual meeting I was asked to provide the opening presentation (A historical perspective on dicamba) in a symposium focusing on issues with dicamba.  Following are the slides and the abstract of my presentation. Powerpoint presentation pdf The auxin-like activity of the phenoxyacetic and benzoic acids was discovered in the early-1940’s. The herbicide dicamba…

Summary of Soybean Aphid Efficacy Evaluation for 2017

2017 Statewide Summary Spring planting conditions throughout Iowa were cold and wet, and most soybean fields were planted later to accommodate corn planting. June turned exceptionally dry, particularly in southern Iowa. Soybean aphids arrived on soybean in mid-June, as they normally do in northeastern Iowa. Hot and dry conditions in June favored twospotted spider mite colonization,…

What’s the real deal with soybean cyst nematodes and cover crops?

The number of acres planted to cover crops annually has been steadily increasing in recent years throughout the United States. Meanwhile, the soybean cyst nematode (SCN) continues to sit atop of the U.S. list of yield-suppressing pathogens. It’s no coincidence, then, that there is an increasing interest regarding the potential for these two factors to…