Average nightly captures of corn earworm moths in area black light traps were as follows: Suffolk=8; Southampton=1; Warsaw=20; Prince George (Templeton)=10; Prince George (Disputanta)=5. There were no reports of any brown marmorated stink bugs caught in the black light traps this week. Here is the corn earworm data table: BLT_21_Sep_2017
Most reporting black light trap stations this week had decreased corn earworm moth captures (except for Chesapeake remaining constant). Nightly averages were Chesapeake = 11; Southampton = 1; Suffolk = 8; and Warsaw = 4 moths. Here is the data table: BLT_7_Sep_2017
No brown marmorated stink bugs were caught this week in the black light traps.
This week, corn earworm (bollworm) moth captures in the black light trap were down at most locations (steady at Chesapeake and Prince George-Templeton), perhaps partly due to the rainy weather, but some “down” numbers are still pretty high (Suffolk, for example). The table is here: BLT_31_Aug_2017
We had no reports of any brown marmorated stink bugs captured in the black light traps this week.
NIghtly trap averages for corn earworm moths had a wide range this week–please see the attached pdf file for your most local data: CEW_24_Aug
Corn earworm moth captures in the black light traps ranged from 2 to 45 moths per night; brown marmorated stink bug catches ranged from zero to 2.6 per night. Here are the data tables: BLT_17_Aug_2017
In our corn earworm (bollworm) vial tests, we are averaging 39% moth survival, with 832 moths tested to date.
Black light trap captures of corn earworm/bollworm ranged from 5 to 78 moths per night this week. Brown marmorated stink bug captures ranged from zero to 2 per night. Here are the data tables: BLT_10_Aug_2017
Resistance monitoring of corn earworm/bollworm shows that this season in Suffolk, an average of 39% of moths survived the 24-hour exposure period to the pyrethroid, cypermethrin.
The attached pdf file is a summary of Dr. Sally Taylor’s corn earworm survey in field corn; it is useful in predicting the corn earworm pressure in other crops such as soybean, cotton, and peanut as moths emerge from the corn. There are many folks to acknowledge this year (also included in the pdf file). Please see: CEW_survey_results_2017
Black light trap catches of corn earworm (aka bollworm) moths increased at most reporting stations, ranging from 5 to 58 per night this week. The pheromone traps at Suffolk also caught about 20 moths per night. Mike Arrington reported that he was seeing cotton fields (Bt and conventional) very close to egg threshold for bollworm in Suffolk and Southampton Counties.
Brown marmorated stink bugs ranged from zero to 1.7 per night. The data tables for corn earworm and BMSB are here: BLT_3_Aug_2017
This advisory is posted on behalf of Dr. David Langston. Both downy mildew and anthracnose of watermelons have been identified in the area recently. Please see the attached pdf for more details: Downy and anthracnose
Corn earworm/bollworm moth captures in the black light traps increased this week, with averages ranging from 2 to 65 moths per night. Suffolk and Hanover had high numbers. Brown marmorated stink bugs ranged from zero to 10 per night across our reporting stations (high numbers in Hanover). More details can be found in the tables here: BLT_27_Jul
Be sure to scout your fields to keep aware of your pest situation. The 2017 Virginia Cooperative Extension Field Crops Pest Management Guide contains thresholds, sampling procedures, and products/rates for soybean (pages 4-61 to 4-76), peanut (pages 4-77 to 4-86), cotton (pages 4-87 to 4-100) and other crops. There is also an online threshold calculator for corn earworm in soybean
Results (to date) from Dr. Taylor’s corn earworm survey of field corn are as follows: Accomack= 29% infested ears; Northampton=38%; Henrico=37%; Chesapeake=19%; Dinwiddie=19%; Greensville=19%; Prince George=20%; Southampton=53%; Sussex=26%; Amelia=18%; Lancaster=4%; Northumberland=7%; Richmond County=4%; Westmoreland=6%; and Franklin County=46% infested ears.