The EPA has granted our request for an emergency exemption, allowing the use of Sivanto prime in sweet sorghum for the control of sugarcane aphids. The section 18 label allows for use up to 10.5 oz/acre in a single application. However, testing in grain sorghum indicates 4-5 oz/acre provides excellent control. Application restrictions are Continue reading
It seems that fall armyworms have gotten a running start in recent years. This species does not overwinter in Tennessee, but it may survive warm winters in the extreme southern areas of coastal states during mild winters. It migrates into Tennessee each year. Often, fall armyworms don’t show in substantial numbers until late July or August. However, they are being found Continue reading
This is a reminder that moth trapping data for corn earworm (bollworm), tobacco budworm, and southwestern corn borer will be posted weekly during the summer. You can open the Excel file under the Quick Link menu on the left or directly at this link – http://www.utcrops.com/BlogStuff/2017MothTrappingData.xls. A few southwestern corn borers were caught this week, indicating the first generation is starting, perhaps just a little earlier than usual. Generally low numbers of corn earworm and tobacco budworm moths were also caught last week.
There is growing discussion and interest in the use of cover crops, mostly commonly in soybean but also in corn and cotton. Some of the benefits seem pretty intuitive and include improved control of erosion and the buildup of organic matter. Another obvious benefit is NRCS programs which pay growers to plant specified cover crops. Dr. Larry Steckel and his students have also shown benefits of cover crops in reducing the emergence of Palmer pigweed and some other weeds. However, having said all that, there are some concerns and unknowns about how cover crops might affect populations of soil and seedling pests. Continue reading
Although it appears grain sorghum acres will be quite low in Tennessee during 2017, a list of sorghum hybrids with tolerance to sugarcane aphid have been developed. You can access this list on the United Sorghum Checkoff Program website at the link below.
http://www.sorghumcheckoff.com/farmer-resources/grain-production/hybrid-selection Continue reading
The University of Tennessee’s 2017 Insect Control Recommendations for Cotton, Soybean, Corn, Sorghum, Wheat and Pastures (PB 1768) is now available online. Once available, hard copies will be distributed at Cotton Focus, grain conferences, and other crop production meetings.
Some features you may have overlooked in the back of the book include:
- Listing of insecticide classes (mode of action) and registration numbers
- A list of common “generic” trade names for various insecticides
- Tables ranking the relative efficacy of insecticides on common pests
- Tips to minimize pesticide effects on pollinators
The Plant Management Network has released another online presentation in their “Focus on Cotton” series. This new 10 minute video offers suggestions on the steps that growers, pesticide applicators, and beekeepers can take to reduce any negative effects of pesticide applications on honey bees and other pollinators. Link below to watch this presentation narrated by yours truly.
I’ve been a little slow at posting the Emergency Exemption label that allows the use of Sivanto prime in sweet sorghum (link to 2016 Crisis Exemption Sivanto). The important details of this label are listed below. The standard recommended use rate is 4-5 oz of Sivanto prime per acre.