Category Archives: Soybean

Clethodim and Managing Glyphosate-Resistant Grasses

Clethodim is quickly replacing glyphosate as the “go-to” herbicide for grass control in West Tennessee.  It began a few years ago as folks found that ryegrass and poa in many fields could no longer be controlled with glyphosate.  In more recent years the pace has accelerated as the spread of glyphosate-resistant (GR) summer grasses like goosegrass, jungle rice and Johnsongrass have made it necessary to add clethodim to glyphosate to “prop up” the grass control. Continue reading

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Enlist Soybean Gains China Approval: Some Thoughts

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The news this week was the China approval of Enlist E3 soybeans (soybeans tolerant to glufosinate, glyphosate and 2,4-D) for import.  China also approved the import of Syngenta’s MGI soybeans.  Those soybeans are tolerant to Callisto, glufosinate and Balance herbicides. My understanding is this MGI trait in soybeans still needs EU approval so unlike the Enlist E3 soybeans they will not be offered for sale this year. Continue reading

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What’s Your Type? Understanding the soybean cyst nematode HG Type test and why resistant varieties need to be rotated

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Once you’ve sample your field, had it tested, and you have soybean cyst nematode (SCN), you’ll want to consider SCN-resistant varieties, but there are certain populations of SCN that can reproduce on certain SCN-resistant varieties so how do you know what resistant variety is best for your field – you find out the HG Type of your population – a costly test that UT is offering for free this year to TN farmers. Continue reading

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Roundup Ready Soybean Response to Dicamba Exposure

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The most recent inquires have been on what is the likely yield loss from dicamba drift to non-Xtend soybeans? These have come from fields that showed dicamba drift injury to the soybeans this summer and now are staying green delaying harvest this fall.

These questions have been frequent the last few years.  Research funded by the United Soybean Board was conducted in the Mid-south and Midwest this summer to help answer the question. Continue reading

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