White sugarcane aphid, Melanaphis sacchari, in sorghum: I did not receive any reports of this aphid being found in any new Virginia counties this week.
Brown marmorated stink bug in soybean: Our scouts reported 11 Virginia counties having threshold levels of BMSB, with highest numbers from Bedford and Orange (9 and 6 BMSB per 2-minute visual inspection, respectively). First reports for the season came from James City, King George, Culpeper, and Frederick. Please see the following map:
Corn earworm/bollworm (Helicoverpa zea) resistance monitoring: The number of moths surviving the 24-hour exposure to 5 micrograms of cypermethrin in this week’s vial tests was 45.8% (n = 180 moths evaluated). The seasonal average is 43.4% survival, based on 1,255 moths tested. Black light trap counts: Corn earworm moth captures dropped slightly from the previous weeks’ counts; brown marmorated stink bug counts were zero across all reporting stations. Please see the attached tables (pdf document) for more details: BLT_8_Sep_2016