Category Archives: Weeds

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

Print Friendly, PDF & Email

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

Print Friendly, PDF & Email

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

Print Friendly, PDF & Email

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

Print Friendly, PDF & Email

Follow Up Questions on Reports of Poor Palmer Amaranth Control with Dicamba

Author: Larry Steckel, Extension Weed Specialist 1 Comment

The blog on inconsistent dicamba performance on Palmer amaranth has caused some follow up questions.

Is there any difference between Engenia, Xtendimax and Clarity for actual Palmer amaranth control? NO. I know from repeated research with all three that they all perform fairly well on a 1 to 4” Palmer amaranth.  They all often need follow up applications on Palmer that is larger than 4”.

Are PRE applied herbicides needed in Xtend soybeans?  YES. The folks to date who have had issues with dicamba performance were not using any PRE applied herbicides. It is hard to get good coverage in those thick mats of pigweeds where PREs have not been used.

Print Friendly, PDF & Email

Late Horseweed Infestation Very Heavy in Some Fields

Author: Larry Steckel, Extension Weed Specialist Comments Off on Late Horseweed Infestation Very Heavy in Some Fields

In a March blog I noted the lack of horseweed (marestail) in many fields but thought an April germination event of this weed could come late to the party and pose a problem.  On occasion I make a good guess, as that has clearly been the case.  Continue reading

Print Friendly, PDF & Email

UT Cotton Scout School This Friday

Author: Scott Stewart, IPM Extension Specialist Comments Off on UT Cotton Scout School This Friday

The University of Tennessee Cotton Insect Scout School is scheduled for Friday, May 26 at the West Tennessee Research and Education Center in Jackson. The address in 605 Airways Blvd, Jackson TN. There is no fee, and preregistration is not required.  Registration begins at 8:00 AM with the program starting at 8:30. Content will include hands-on training with an optional ‘go-to-the-field session’ after a box lunch. Topics covered will include cotton development, identification of insects (and their damage) weed and diseases and their damage, and weed identification.

Print Friendly, PDF & Email