All posts by Scott Stewart, IPM Extension Specialist

Fall Armyworm Running Amok (pastures, soybean, lawns, and more)

Picture courtesy of Jake Mallard (click to enlarge)

The fall armyworm outbreak of 2021 is going to be one to remember.  My colleague, Dr. Gus Lorenz in Arkansas called it “epic”.  We knew something was different this year when another colleague in Texas, Dr. David Kerns, gave us a warning over a month ago.  So what’s different? First, the fall armyworm flight is several weeks early, second, larval infestations have been unusually high, and third, for whatever reason, control with pyrethroid insecticides has been unusually poor (ranging from sometimes acceptable to a complete failure).

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Using the Thrips Infestation Predictor for Cotton

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A reminder the Thrips Infestation Predictor for Cotton described in the article below, published last year, is still available for use.  However, the link has changed to


The Thrips Infestation Predictor for Cotton is a useful tool for predicting whether a foliar insecticide application is needed for thrips control in cotton. It uses local weather data in association with a user defined planting date to estimate the size of the local thrips population, the susceptibility of seedling plants, and thus, the risk of thrips injury. The model is for tobacco thrips, by far the most common species infesting cotton in Tennessee. Continue reading

The New !!!

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If you haven’t noticed, our website has gotten a facelift.  You may not recognize it when you first visit us at  However, it’s organized similarly to the old version.  I’m sure there are a few bugs that need to be fixed, but take a look!  This site gives you ready access to essentially all UT resources related to row crop production.


Cotton and Soybean Insect Update: Is it a Wormy Year or Not?

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Corn earworm (bollworm) moth

Sometimes there is no substitute for scouting. Spraying based on rumor or what your neighbor does will get you in trouble (or waste money). I predicted a relatively large corn earworm (bollworm) moth flight, but the average trap catches don’t support that. Having said that, there are definitely pockets of bollworms in late soybean and more widespread issues in cotton. Cotton maturity is all over the board depending on planting date, variety, and field conditions. The most mature cotton is Continue reading

Bollworm Management in the Coming Weeks

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Bollworm feeding on boll

Although  current moth activity remains relatively low, I’m expecting a peak of moth activity sometime beginning around August 5th through 10th. Bollworm (a.k.a., corn earworm) poses a significant threat to cotton and soybean, and particularly late planted soybean that are still flowering when the flight arrives. Below are some thoughts on managing for this troubling pest. Continue reading

Emergency Label Approved for Sivanto in Sweet Sorghum for Sugarcane Aphids

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Sugarcane aphids

Please see the authorization letter linked below which allows the use of Sivanto (flupyradifurone) for control of sugarcane aphids in sweet sorghum. This product is already registered for use in grain sorghum. The authorization letter lists restrictions for the use of this product. Thanks to the EPA for once again granting this section 18  exemption.

20TN01 – Sivanto signed authorization letter

Virtual Milan No-till Field Day … Available Now!

Follow the link below to experience the 2020 Milan No-till Field Day at your own pace! You can watch an entire tour by clicking on its name, or just one presentation by clicking on a specific title.

Please note, all links will open in a new tab. Closed captions are available by clicking the “CC” button on the right side of the video’s play bar.

Research Tours