Tuesday, August 14, 2007 -- 9:00 AM - 4:00 PM
Jerry Nordick Farm, Rothsay, MN
A new Forage Website and Newsletter have been launched by the University of Minnesota Extension Forage Team. The website highlights current events and programs, research updates, hay auction results, and recent publications.
New Look for Weed Management Info on the Web
In the states with corn, soybeans, small grains and sugar beets as major crops, herbicides are applied to more than 97% of crop acreage. Although herbicides are applied to increase profitability, incorrect usage can have negative economic and environmental impacts.
Soybean rust was reported in Matagorda County, Texas (7/30). It was also reported on soybean in a second county in a soybean sentinel plot in Arkansas - Hempstead County (7/27); along with five counties (Bowie, Delta, Lamar, Navarro, and Red River Counties) in commercial soybean fields in Texas (7/26 and 7/27). Some of these reports are from multiple fields within a county.
Populations remain quite tolerable in the northwest region. The exception might be in heavily wooded areas and with smaller fields such as in Ottertail County near Underwood, a location which persistently has problems with the aphids.
As fields are scouted for soybean aphid you might be seeing some insect feeding on leaves. At least two insects are contributing to this damage, perhaps three.
There have been some reports of lygus in sugarbeet in the RRV in the past week. Treatment with an insecticide may be justified if an infestation exceeds 1 Lygus bug per plant (adults and nymphs combined) after checking 30 to 50 plants in a field.
Have you scouted your non-Bt corn fields? Currently, the population of borer larvae are reaching the critical third instar. Why is this stage critical? That is the age when larvae begin to tunnel stalks or enter ears.