The Environmental Protection Agency has registered Revysol, the branded active ingredient name for mefentrifluconazole from BASF. State registrations are pending. In corn, it will be marketed under the Veltyma product brand name. The DMI fungicide, which provides broad-spectrum control of a variety of diseases, belongs to the Fungicide Resistance Action Committee’s Group 3. Revysol fungicide has a unique isopropanol link ... Read More »
Milder than normal winter temperatures allowed stink bugs and grasshoppers to survive and thrive this spring. Dr. Katelyn Kesheimer, an Alabama Cooperative Extension System entomologist, says brown and southern green stink bugs are showing up in corn right now. “The stinkbugs were heavy in wheat,” she says. “Once the wheat is harvested, they move into corn to begin feeding. There ... Read More »
Effective May 20, the Environmental Protection Agency has cancelled registrations of 12 neonicotinoid insecticides based on voluntary requests from product registrants, according to a May 20 Federal Register notice. Under a December 2018 settlement agreement linked to an Endangered Species Act challenge by environmental groups, the companies voluntarily agreed to cancel 12 of 59 products that contain the active ingredients chlothianidin ... Read More »
The wet and cold start to this year’s corn planting season bodes poorly for yields, based on research from the University of Missouri Extension. But MU Extension agronomist Bill Wiebold says farmers should not switch from corn to other crops or early maturing corn varieties because of rain-delayed planting. There is still time to get corn in the ground and ... Read More »
• By Larry Steckel • Questions continue to arise on management of glyphosate-resistant (GR) Johnsongrass in corn, soybean and cotton. GR Johnsongrass continues to become more of an issue with each passing year. The main threat with Johnsongrass is in corn where there are few POST applied options. Judging by infestations of Johnsongrass in some corn fields, we may not ... Read More »
• By Angus Catchot • Brown stink bugs have been treated on a fair number of acres of corn in the Mississippi Delta this year. With the loss of methyl parathion, there are not a lot of good choices to control this pest in corn. We are essentially left with only the pyrethroid class of chemistry. As pyrethroids go, they are ... Read More »
• By Larry Steckel • Clearly this year, many are having trouble managing ryegrass and poa. Questions began months ago and continue today and have ranged from tactics to burn them down before planting to how to control them in a standing corn crop. What has become abundantly clear is that glyphosate is no longer an effective burn down option ... Read More »
Know Conditions That Favor Nematode Buildup In corn fields, wet weather in April is a recipe for nematode problems—specifically cotton root knot and stubby root nematodes. While not widely recognized as a yield-reducing pest in corn, the root knot nematode is a pest that affects both cotton and corn. Austin Hagan, an Alabama Cooperative Extension System plant pathologist, said the ... Read More »
One of the most prolific and well known insect pests is the stink bug. There is a good reason for this says Kathy Flanders, Extension Specialist and professor for Auburn University and the Alabama Cooperative Extension Service. “Stink bugs have a wide range of hosts, including wheat, corn, cotton and soybeans. They can also have multiple, overlapping generations.” Read More »
Bacterial Leaf Streak Bacterial leaf streak, caused by Xanthomonas vasicola pv. vasculorum (synonym X. campestris pv. zeae), was confirmed for the first time in the United States in many counties across Nebraska in 2016, and it was also confirmed in Colorado, Illinois, Iowa and Kansas. As yet, it has not been found in the Delta region or the Southeast; however, ... Read More »
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