All posts by Scott Stewart, IPM Extension Specialist

Thinking About Bollworm Management in Cotton

As of this today (July 24), the bollworm moth flight has not kicked off.  Traditionally, we will start seeing a significant increase next week or the first week of August. This year, I expect to see a gradual increase but an extended flight because of the wide range of corn planting dates.

Bollworm resistance to some Bt toxins (Cry1 and Cry2) in Bt cotton is now well documented Continue reading

Crunch Time for Cotton Insects

The 3-4 weeks after first bloom, and typically the last two weeks of July and the first two weeks of August, is a critical window to scout and manage insect pests. This is when we are setting the bolls that will contribute most to yield, and it’s also a time insects are most attracted to the crop (with plenty of susceptible fruiting structures to feed on). Most of the comments in this article will focus on plant bug and stink bug management. However, bollworm management will become a bigger factor by the end of the month. I’ll hit on that topic Continue reading

Reminder – Soybean Scout School This Week (7/17) in Dyersburg

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UT’s Soybean Scout Schools will be held in July (see below). These field-side programs 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. Continue reading

Insect Calls of the Week (July 3, 2019)

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Clouded plant bug adult

Plant bugs … I’d classify the overall plant bug pressure in cotton as average, although we are seeing a few more clouded plant bugs than in recent years. Until bolls are present, count tarnished and clouded plant bugs the same. Once bolls are present, I suggest counting clouded plant bugs as equivalent to 1.5 tarnished plant bugs when making a treatment decision, primarily because clouded plant bugs are more inclined to feed on bolls.  As cotton begins blooming, Continue reading

Managing Early Season Plant Bugs in Cotton

Good early-season management of tarnished plant bugs relies on a sweep net, monitoring square retention, and making timely insecticide applications as needed. During the first two weeks of squaring, the recommended treatment threshold is an average of 8 or more plant bugs per 100 sweeps. After that, treatment is recommended anytime of infestations average 15 or more plant bugs per 100 sweeps Continue reading

REMINDER – UT Cotton Scout School (Friday, May 31, 2019)

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The UT Cotton Scout School is scheduled for the last Friday of the month, May 31st, at the West Tennessee Research and Education Center (605 Airways Blvd, Jackson). 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 classroom and hands-on training with an optional ‘go-to-the-field session’ after a box lunch. Topics covered will include cotton development and identification and symptoms of insect pests, plant diseases, and weeds.