Virginia: High Numbers of Brown Marmorated Stink Bugs; Corn Earworm Resistance at 46%

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:


Kudzu bug in soybean:  Our scouts have not found any Virginia counties with threshold levels of this pest in 2016.  The current 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

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