Danielle Sekula, Extension Agent IPM in the Lower Rio Grande Valley, reported high SCA populations in her April 14th newsletter.
"In grain sorghum we are seeing sugarcane aphids in very high numbers in all 3 counties. Most grain sorghum is either at boot, heading or flowering stage. In grain sorghum that is at boot stage or heading I am seeing about 5 to 15 winged aphids per leaf laying colonies of aphids, about five per each, so they are colonizing fast. In grain sorghum that is in the flowering stage I am finding anywhere from 500 to 3000 sugarcane aphids per leaf in some areas. Do realize that sugarcane aphids are all across the board and migrating inland fast to new fields each day. I predict that these next two weeks we will reach our population peak for the sugarcane aphid in grain sorghum. So please go out and check your grain sorghum for SCA, especially if you are already in the flowering stage because more than likely you already have them there. Now the two products available to spray for the sugarcane aphids this year are Sivanto and Transform. Sivanto spray at 4-5oz/acre, do not go lower than 4 oz for good residual and Transform use that product at 1-1.5oz/ acre, do not go any lower than 1 oz for good residual."
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Wednesday, April 12, 2017
Sugarcane aphid was confirmed infesting planted sorghum in Fort Bend County on April 11 by Robert Bowling, Extension Entomologist with Texas A&M AgriLife Extension. Since sugarcane aphid was first reported this year in Hidalgo County on March 21, it has been found in planted sorghum in 7 counties (shown in green on the map below). Dr. Bowling reports that sugarcane aphid activity is about a month earlier this year. For information on the SCA situation in the Lower Gulf Coast, read Dr. Bowling’s April 3 newsletter at: http://betteryield.agrilife.org/ Texas A&M AgriLife Extension Entomology is mapping sugarcane aphid occurrence in sorghum in Texas counties using the MyFields.info network. These reports are displayed on the sugarcane aphid map maintained by EDDsMap as shown below. To view and receive map updates, sign up at https://www.myfields.info/