Vegetable Crop Insect Scouting

David Owens, Extension Entomologist, owensd@udel.edu

Sweet Corn
This is the last week that we are checking pheromone and blacklight traps. Many thanks to Richard Monaco and Joseph Deidesheimer for faithfully and routinely checking traps Monday and Thursday. Also, thanks to Jon Baker with Trapwoods and Harry Thompson for sending in trapping information. Moth counts from Thursday are as follows:

Trap Location BLT – CEW Pheromone CEW
3 nights total catch
Dover 1 51
Harrington 1 6
Milford 3 23
Rising Sun 0 3
Wyoming 1 28
Bridgeville 2 55
Concord 1 11
Georgetown 3 10
Greenwood 1
Laurel 3 17
Seaford 6 4
Millsboro 2 22
Lewes 0 3

Peppers
Continue scouting for beet armyworm. Moths continue to be active and lay eggs. Look for webbing and fine skeletonizing on the upper canopy indicating small larvae are present.

Spinach
Continue scouting for beet webworm. Moths are numerous in flowering crops right now, especially old watermelon and lima bean.

Cole Crops
Diamondback moth has not been as abundant this year as last year, but that seems to be compensated for with an abundance of cabbage looper, cross striped worms, beet armyworm, and the occasional corn earworm. As a reminder, beet armyworm is resistant to pyrethroids. Corn earworm burrows into heads pretty deeply and is also less susceptible to pyrethroids. Rotate modes of action and save some of the broad spectrum materials for later in the season after parasitoids have done their work.

Lima Beans
Continue scouting for soybean looper. Avaunt eVo now has a 2ee recommendation for soybean looper treating using the same rates for corn earworm. It has a 3 day PHI. In field crops the active ingredient is formulated as Steward. It does a pretty good job on loopers. The 2ee can be found at http://www.cdms.net/ldat/ldG4P003.pdf.

Print Friendly, PDF & Email