Category Archives: Insects

Cotton – Thinking Ahead About Bollworms

Author: Scott Stewart, IPM Extension Specialist No Comments

It is uncertain how big our moth flight will be this year. As usual, bollworm moth catches have been generally low to this point. However, you can expect activity to slowly increase, with a peak in moth activity occurring the last week of July and the first week of August. With the decreasing efficacy of pyrethroid insecticides and increasing tolerance to some Bt toxins, you should plan on using Continue reading

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Cotton – Crunch Time for Plant Bugs and Stink Bugs

Author: Scott Stewart, IPM Extension Specialist No Comments

Now through the end of July is the critical time to manage infestations of plant bugs and stink bugs. Of course it varies considerably, but we are seeing more consistent infestations of plant bugs. Stink bugs have made a come back after very low populations last year. Clouded plant bugs are also a bigger part of the mix this year in some areas. I prefer the drop cloth during this time frame, using a threshold of 3 tarnished plant bugs on a drop cloth as the treatment threshold. As a rule of thumb, Continue reading

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Soybean Insect Update

Author: Scott Stewart, IPM Extension Specialist No Comments
Green stink bug nymph

Having done several scout schools this past week and spending some time on the phone, there doesn’t appear to be any major insect pest problems in soybean at this time. However, it is also clear that stink bug populations have rebounded from last year. Some early maturing fields are above the suggested treatment threshold of 9 stink bugs per 25 sweeps. Most are green stink bugs, and Continue reading

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Updates – UT Soybean Scout School on July 6, 9 and 10

Author: Scott Stewart, IPM Extension Specialist Comments Off on Updates – UT Soybean Scout School on July 6, 9 and 10

UT Extension will be hosting three Soybean Scout Schools during July. Final details will be announced later, but these field-side programs last approximately 2.5 hours and cover the basics of soybean growth, scouting, pest identification, and general management.  Pesticide recertification and CCA CEU points will be available. Scout Schools are offered free of charge with sponsorship from the Tennessee Soybean Promotion Board. Registration is not required. Participants will receive a scouting notebook and a sweep net while supplies last.

  • Friday, July 6 – 9:00 AM at the West Tennessee Research and Education Center, 605 Airways Blvd, Jackson, TN
  • Monday, July 9 – 12:30 PM – Beginning with a lunch at Wales Station Farms shop located at 540 Little Dry Creek Road Pulaski, TN …… and the Scout School will be held field side at 1:30 PM at 18498 Hwy 64 W, Pulaski, TN
  • Tuesday, July 10 – 9:00 AM at 8303 Clay Gregory Road, Orlinda, TN
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Managing Plant Bugs in Blooming Cotton

Author: Scott Stewart, IPM Extension Specialist Comments Off on Managing Plant Bugs in Blooming Cotton

Reports of increasing plant bug pressure in cotton is not unexpected as we move into July. I’ve fielded a lot of questions about what to treat with, and it is hard to get very inventive when there are only a few ‘got to’ insecticides. Acephate/Orthene and Transform are the backbone of our plant bug management program in blooming cotton. Getting Bidrin into the mix is another option. I encourage everyone to try to work in Diamond and Transform (or both) into their insecticide program. Overreliance on OP insecticides such as Continue reading

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Cotton Insect Situation

Author: Scott Stewart, IPM Extension Specialist Comments Off on Cotton Insect Situation

Tarnished plant bug infestations are sporadic and variable, mostly a scout a spray scenario. I’ve had a number of comments, especially from the Mississippi River Bottoms, about seeing more clouded plant bugs than usual. Prior to bloom, I count them as equivalent to tarnished plant bug when sampling and making treatment decisions. Once bolls are present, I suggest counting them as equivalent to 1.5 tarnished plant bugs because they are more inclined to injure bolls. Don’t forget to monitor square retention. The goal is to reach first bloom with at least 80% retention Continue reading

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Herbicide injured cotton: Deciding to keep it and management after

Author: Tyson Raper, Cotton & Small Grains Specialist Comments Off on Herbicide injured cotton: Deciding to keep it and management after

I’ve received several calls this week requesting information on whether or not to keep injured cotton and management after the injury.  In this brief article, I will cover the ‘keep or discard’ decision and briefly cover best management practices after the decision to keep the crop has been made. Depending on your situation, you may need to document the injury and/or keep a portion of the field to determine the yield penalty. That information is beyond the scope of this article but should be available from your insurance agent or attorney.  Continue reading

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