Friday, July 21, 2017

MDA Meetings in NW MN for the Proposed Nitrogen Fertilizer Regulation

MDA extends comment period on proposed nitrogen fertilizer regulation

Public input sought at meetings scheduled in Northwestern Minnesota

St. Paul, MN - The Minnesota Department of Agriculture (MDA) has extended the public comment period for its draft proposal for the use of nitrogen fertilizer in Minnesota. The purpose of the proposed Nitrogen Fertilizer Rule is to minimize the potential for nitrate-nitrogen contamination from fertilizer in the state's groundwater and drinking water. Public comments will now be accepted through Friday, August 25, 2017.

The Dicamba Dilemma:  Facts and speculations

Used with permission by Aaron Hager, University of Illinois

Dicamba injury to soybeans in a southwestern
Minnesota field. Photo: Stephan Melson

Dicamba injury to non-target crops has dominated Extension discussions this week. Non-tolerant soybeans are extremely sensitive to this chemical and damage has been reported in a number of fields throughout the state. The following article by Dr. Aaron Hager at the University of Illinois echoes observations we have been making in Minnesota and summarizes injury symptoms on soybean, possible routes of exposure, and potential yield effects. His article is reprinted in its entirety

Thursday, July 20, 2017

Soybean Aphid Speed Scouting: An option for people who don't like to count aphids

With the focus on soybean aphid scouting, I still like to promote the scouting procedure called “Speed Scouting”. The method speeds up making decisions on whether to treat or not based on the aphid’s population distribution in the field when the treatment threshold of 250 aphids per plant and 80% of the plants with these levels is reached. 

A review of the biology and economics behind soybean aphid insecticide recommendations

As farmers and their advisers begin to make soybean aphid decisions for their fields, the timing is right for a fact-based review of what is known about soybean aphid, their effect on yield, and cost-effective management of this pest. 

Soybean Aphid in Red River Valley fields are increasing - Fields at threshold levels being reported

Soybean aphid populations have been increasing and fields with threshold level infestations are being treated. Populations in Northwest Minnesota are greatest in the counties of Norman and Polk, MN and in Grand Forks and Walsh counties of ND.