Category Archives: Sorghum

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

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Moth Trapping Data

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Corn earworm (bollworm) moth

A reminder that moth trapping data are updated weekly at http://www.utcrops.com/BlogStuff/2020MothTrappingData.pdf, and you can also access these data on the Quick Links of this site.  Pheromone-baited traps are run for corn earworm (bollworm), tobacco budworm, and southwestern corn borer.

Currently, moth trap catches are generally low, as typically observed this time of year.

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Thinking About Insect Pests During Planting Season

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Black cutworm and cut cotton plant

There are some basic management practices that can affect, sometimes worsen, and other times be used to reduce risks of insect pest injury. Below, I’ve included some observations and suggestions for your consideration.

As a general rule of thumb (but not universally true), no-till production increases the risk of some problems including pests like cutworm, threecornered alfalfa hopper, slugs, and several below ground pests (e.g., wireworms and white grubs). Of course, tillage is not an option in most areas of Tennessee. Thus, most entomologists suggest Continue reading

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Field Crop Insect Management Recommendations (PB 1768) Available Online

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The 2020 version of PB 1768, Insect Management Recommendations for Field Crops (and pasture), is now available. The guide has gone through substantial revision this year and closely matches the content on the mobile friendly Disease and Insect Field Guides at https://guide.utcrops.com/. Hard copies will be available soon and distributed through county extension offices and at various educational meetings.

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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

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Emergency Exemption (Section 18) Granted for Sivanto in Sweet Sorghum

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Sugarcane aphids

The Tennessee Department of Agriculture and the EPA has again approved a Section 18 that allows the use of Sivanto prime on sweet sorghum for the control of sugarcane aphids during 2019. This pest is potentially devastating for those growing sweet sorghum for molasses or other uses, and Sivanto prime is an excellent any the only available insecticide option in this crop. Specific requirement for it’s use are summarized below and detailed in the Continue reading

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Section 18 Approved for Sivanto in Sweet Sorghum

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The EPA has approved Tennessee’s Section 18 request for Sivanto (a.k.a. Sivanto prime) in sweet sorghum for control of sugarcane aphid. This product is already fully labeled on grain sorghum, but requires an emergency use exemption is sweet sorghum. Sivanto is the only insecticide labeled in sweet sorghum for control of the sugarcane aphid. Specific use requirements are listed below. Continue reading

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Moth Trapping Results and Other Reminders

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A reminder that weekly moth tap catches for corn earworm (bollworm), tobacco budworm, and southwestern corn borer can be found under the quick links menu under Moth Trapping Data.

With the exception of southwestern corn borers (SWCB) in some locations , we’ve not been catching many moths. Now would be a good time to scout the whorls of any non-Bt corn for the presence of corn borers. Remember that the treatment threshold during the whorl stage is when 5% of plants are infested with SWCB.

Also remember that UT Pest Guides are available at http://guide.utcrops.com/. They provide the latest information of pest identification, sampling, and management in a mobile-friendly, app-like format.

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