Author Archives: Sean Malone

Corn earworm report for July 18, 2019

Very low numbers of corn earworm moths were reported by our network of black light trap operators this week. Nightly averages ranged from 0.3 to 1.0 moths. Here are this week’s numbers (trap operators listed in parentheses):

Greensville (Sara Rutherford): 0.7 per night

Hanover (Laura Maxey-Nay): 0.9 per night

Prince George-Templeton (Scott Reiter): 0.8 per night

Prince George-Disputanta (Scott Reiter): 0.5 per night

Richmond County-Warsaw (Mary Beahm): 0.3 per night

Southampton (Josh Holland): 0.3 per night

Suffolk (Sally Taylor and crew): 1.0 per night

Here is a pdf of the data table: BLT_18_Jul_2019

We will be conducting vial tests to monitor insecticide resistance in corn earworm/bollworm again this year, but so far we have only captured and tested a handful of moths.

Corn earworm moth black light trap report for August 23, 2018

Average nightly corn earworm moth captures for local black light traps this week were as follows: Chesapeake=8.0; Dinwiddie=42.6; Hanover=3.4; Isle of Wight=0.9; Prince George (Templeton)=1.3; Prince George (Disputanta)=3.3; Warsaw=6.6; Southampton=0.9; Suffolk=33.0; and Sussex=1.9

Here is the link to the data table:  BLT_23_Aug_2018

Thanks to Watson Lawrence, Mike Parrish, Laura Maxey Nay, Livvy Preisser, Scott Reiter, Mary Beahm, Neil Clark, and Dwayne Sanders for their reports!

Black light trap and vial test update for August 2, 2018

Corn earworm moth captures in black light traps continued to climb this week–please see the attached table (pdf document) for more details: BLT_2_Aug_2018

We have tested 246 corn earworm moths in our vial tests this season, with an average of 15% surviving a 24-hour exposure to the pyrethroid insecticide cypermethrin at 5 micrograms per vial. The line graph is available here: vial_tests_2_Aug_2018

At our research farm in Suffolk this week, we have been finding bollworm eggs in cotton terminals with some small larvae on squares and bolls. Please be sure to scout your fields!

2018 survey of field corn for corn earworm larvae

Statewide, approximately 18% of ears were infested with corn earworm larvae. Corn is considered a nursery crop for corn earworm, allowing the pest to complete a lifecycle and then move on to other crops such as soybean, cotton, and peanut in August. There is a linear correlation between the infestation level in corn and the amount of soybean acreage that gets treated with insecticide for this pest. Please see the attached pdf for more details: CEW_survey_results_2018

Corn earworm moth report for July 26, 2018

Black light trap captures of corn earworm moths in Suffolk really jumped this week, averaging 30 per night (some nights when it wasn’t raining went up to 78). Other locations (Chesapeake, Isle of Wight, Prince George/Templeton, Prince George/Disputanta, Warsaw, and Southampton) averaged only about 1 moth per night this week.