Category Archives: Weeds

Best Management Practices to Mitigate Dicamba Drift

Author: Larry Steckel, Extension Weed Specialist 1 Comment

We clearly have to get a better handle on the dicamba drift issue in this state.  In cotton there is no reason to use anything but Liberty now.  In soybeans, particularly seed fields, there maybe no choice but to have to use a dicamba product. The following are some best management practices to reduce the potential of off-target wandering of dicamba. Continue reading

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2017 Soybean Scout Schools in July (Final Details)

Author: Scott Stewart, IPM Extension Specialist Comments Off on 2017 Soybean Scout Schools in July (Final Details)
Looper (2 pair of prolegs)

The 2017 Soybean Scout Schools have been scheduled for three locations. Scout schools are sponsored by the Tennessee Promotion Board. They typically last 2-2.5 hours and provide hands-on training on the basics of soybean growth and the scouting and management of weeds, insects, and diseases. Participants will receive a scouting notebook and complimentary sweep net while supplies last. Pesticide recertification points and CCA CEU points are offered. See below for details, and updates and reminders will be posted in future articles. Continue reading

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Herbicide Burn on Cotton and Soybean More of an Issue This Spring

Author: Larry Steckel, Extension Weed Specialist Comments Off on Herbicide Burn on Cotton and Soybean More of an Issue This Spring

There have been a lot of phone calls in the past few days with folks concerned about POST applied herbicide tankmix burn on cotton and soybeans.  We see burn from POST applied tankmixtures every spring but the crop response from applications over the past 10 days has been more pronounced. Continue reading

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Management of Large Horseweed in Soybean

Author: Larry Steckel, Extension Weed Specialist Comments Off on Management of Large Horseweed in Soybean
Horsweed recovering from 0.5 lb of dicamba

There have been a few reports of good sized (>12”) horseweed (marestail) putting on significant new growth after an Engenia or Xtendimax application. Though these occurrences have been relatively few they are a concern as the horseweed appears to be growing back with a vengeance (Picture right).

As we go into the double crop soybean planting stretch these reports are a good reminder to apply a good burndown on horseweed prior to even Xtend soybeans emerging. Continue reading

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Final Verdict on First Field with Reported Poor Palmer Amaranth Control with Dicamba

Author: Larry Steckel, Extension Weed Specialist Comments Off on Final Verdict on First Field with Reported Poor Palmer Amaranth Control with Dicamba

I blogged several weeks back on the poor Palmer amaranth control with Engenia in a field in Fayette County.  We followed up by applying another application of Engenia on the still green Palmer 14 days after the first application.   I am glad to report that all the Palmer amaranth were controlled 14 days after the second Engenia application. Continue reading

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Will the Palmer Amaranth Die after an Engenia or Xtendimax Application???

Author: Larry Steckel, Extension Weed Specialist Comments Off on Will the Palmer Amaranth Die after an Engenia or Xtendimax Application???

The question of the week is will the Palmer amaranth die that is still green after an Engenia or Xtendimax application? The situation is that many pigweeds in some fields have not grown after an Engenia or Xtendimax application but still remain green going on 10 days or more after the application.  The question is will these pigweeds start to regrow? Continue reading

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Scout Cotton Fields for Palmer Amaranth Breaking Through Residual Control

Author: Larry Steckel, Extension Weed Specialist Comments Off on Scout Cotton Fields for Palmer Amaranth Breaking Through Residual Control

The very wet May has led to rapid degradation of the PRE applied herbicides in cotton.  In our tests at Jackson that were planted 21 days ago all the PRE applied herbicides have broken.  Some broke very quickly after application while others held on a little better, even with all the rain. Continue reading

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