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Vegetable IPM Updates Archive
Cooperative Extension
Areawide Insect Trapping Network (November 14, 2018)
Our area-wide trapping network is up and running. The project is designed to measure the activity and movement of adult populations of a number of key pests. The project is being funded by the Arizona Iceberg Lettuce Research Council, and will hopefully provide an indication of when pest activity (e.g., corn earworm moth flights) is increasing based on pheromone/sticky trap captures. The data is not intended to indicate field infestations, as trap data is largely a reflection of adult movement. If nothing else, the data may make PCAs aware of increased pest activity in some areas and encourage intensified scouting in susceptible produce fields. The pests being monitored include: corn earworm, tobacco budworm, beet armyworm, cabbage looper using pheromone traps; aphids, thrips and whiteflies using yellow sticky traps. A total of 15 trapping locations have been established. Traps will be checked weekly and data will be made available in the bi-weekly Vegetable IPM updates. If a PCA or grower is interested in weekly counts, those can be made available by contacting us. Results of pheromone and sticky trap catches can be viewed here.

Corn earworm: Moth activity has dropped significantly in areas where it was previously high.

Beet armyworm: Moth activity remains high in many areas (Dome/Wellton/Roll), and counts are higher than this time last season.

Cabbage looper: Cabbage looper counts remain unusually low for this time of season.

Whitefly: Adult movement has slowed significantly in most areas, but counts increased slightly in traps located near recently harvested melons.

Thrips: To date, thrips activity has been seasonably low at most trap locations, but increased activity near recently harvested melon fields.

Aphids: We are continuing to pick up aphids in traps, particularly in the Yuma Valley consistent with wind’s coming predominantly out of the W-NW in the past two weeks. However, counts are not as high as last year.

Leafminers: Adult activity remains seasonably low in all locations, but counts are high in one trap located adjacent to where melons were recently harvested.

Diamondback moth: Diamondback moth (DBM) counts in pheromone traps have increased in most trap locations over the past two weeks, but overall are lower than we observed this time last season (See DBM Trap Network).
To contact John Palumbo go to:


For questions or comments on any of the topics please contact Marco Pena at the Yuma Agricultural Center.
College of Agriculture, The University of Arizona, Tucson, AZ.

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