All posts by Scott Stewart, West TN Research & Education Center

Cutworms, corn, and in-furrow insecticides

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As we approach corn planting time, I’ve had several questions related to cutworm management and/or the use of in-furrow insecticides.  I’ve written about this subject before (https://news.utcrops.com/2015/03/is-it-too-early-to-think-about-cutworms/).

Although cutworms are not a common problem on most acres, they can sneak up on you. The suggested treatment threshold for cutworms is when 5% or more of plants are damaged or 2 or more larvae are found per 100 plants. However, I often recommend a Continue reading


Sugarcane Aphid Tolerant Hybrids

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Although it appears acres of grain sorghum will drop substantially in Tennessee during 2016, those still planning on growing sorghum may find the information linked below helpful. This publication was developed by Sebe Brown and Dr. David Kerns (LSU AgCenter). It is a list of hybrids that have shown some resistance to infestations of sugarcane aphids. This list is not all inclusive, including only those hybrids that have been evaluated. Not all hybrids would be appropriate for our area, but it is a starting point. Please note that insecticides may still be needed to manage infestations.  Continue reading


Wheat, Aphids, and Barley Yellow Dwarf Virus

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It’s the time of year.  A late winter insecticide application for the control of aphids in wheat often results in a yield increase.  I typically recommend an application before the end of the month. UT data suggests this reduces or delays barley yellow dwarf virus. A late winter insecticide application  Continue reading


Weed and Insect Control Recommendations Now Available

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The 2016 Weed Control Manual for Tennessee (PB1580) and the 2016 Insect Control Recommendations for Field Crops (PB1768) are now available online.  As always, hard copies will be made available at various county and state production meetings and at Extension county offices.  But they are always a couple of clicks away at UTcrops.com.

Insect Control Guide
Insect Control Guide
Weed Control Manual
Weed Control Manual