A new pest, the sugarcane aphid, made its first appearance in Tennessee sorghum in 2014. I’m hearing a lot of interest about increasing sorghum acreage this year, and this is a pest we need to think about in advance. Continue reading
The 2015 version of PB1768, Insect Control Recommendations for Field Crops, is now available online at UTcrops.com. Hard copies will soon be available and distributed at UT county and crop production workshops.
One of our County Agents, Walter Battle, had the good idea of asking me to post this information.
Producers as the 2014 harvest continues, be mindful that on October 21st, Tennessee Department of Agriculture Private Applicator Certifications will expire. With that in mind, many University of Tennessee Extension offices are providing re-certification trainings. Call or check with your Continue reading
Fall armyworms attack a wide range of grasses and other crops. Outbreaks have been reported on soybeans, sorghum, pastures and several other crops for over a month. We are having a biblical year with fall armyworm, especially in pastures and lawns. However, many are also wandering into the edges of soybean fields. My colleague, Dr. Frank Hale, recently sent the following information. Continue reading
Below is the updated, known distribution of sugarcane aphids in 2014, including confirmed finds on sorghum in Tennessee. This aphid is certainly present in at least low numbers in other areas. The second map shows the distribution of this invasive pest in 2013, showing the impressive spread Continue reading
Desiccant options for grain sorghum are more limited than other crops. Basically we are limited to glyphosate or sodium chlorate. Aim herbicide can be included with another material where morningglory vines are dense enough to interfere with the combine. Gramoxone is not labeled for desiccation of grain sorghum.
Glyphosate products: apply only after seed have reached 30% moisture content or less and harvest is at least 7 days out. Rates are from 32 oz to 64 oz/A in 10 to 20 gallons water per acre by ground or 3 to 10 gallons water per acre by air. Glyphosate is a slow acting material and has not been shown to measurably reduce seed moisture in small plot research. It should not be used on sorghum grown for seed production.
Sodium chlorate products: apply 7 to 10 days before harvest at labeled rate. There are a number of products available that have different rates of active ingredient. Consider using the higher recommended rate if applying when weather is cloudy and/or damp.
I am pleased to announce the fast action of the Tennessee Department of Agriculture and the EPA in approving a specific exemption allowing the use of Transform WG for the control of sugarcane aphids in sorghum. Some specific label requirements are below. You may view the complete authorization letter here. Continue reading