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The Sands Of N IN | Our good friends at Purdue University say that significant leaf defoliation must occur before an insecticide treatment is needed on soybeans, even at these high grain prices...probably a whole field of the last leaf you showed. Beetles tend to be "patchy" especially along field edges.
That weed is Scouring Rush and is actually a sedge. Almost nothing will control it and tillage through it will make it worse. Might have some luck with something like Yukon in corn.
Link to Scouring Rush info: http://www.illinoiswildflowers.info/grasses/plants/scouring_rush.ht...
Edited by B58 Hustler 7/27/2008 17:19
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Japanese Beetle damge ? effect yield Pics
