Results of pheromone and sticky trap catches can be viewed here.
Diamondback moth:
- DBM captures beginning to increase in all trap locations comparable to previous years during September.
- To date, average captures ( < 1 moths / night ) comparable to the 2018-19 growing season
- Moths have been most active in the Yuma Valley where they averaged ~ 1 moth/night in the in traps in both the north and south ends of the valley.
- Comparisons between paired fields showed that a significantly higher number of adults were trapped in transplants (cabbage and cauliflower) compared to direct seeded broccoli.
- Moth activity is 5-fold higher now than this time last year.
Diamondback
We have started our Areawide Insect and DBM Trapping Network for the 2019-20 season.
We have added another trapping location in Bard, CA.
Area wide Insect Trapping Network VegIPM Update, Vol. 11, No. 20, Sep 30, 2020
Results of pheromone and sticky trap catches can be viewed here.
Corn earworm: Moth activity about normal for September but beginning to increase, particularly in Dome Valley and south Yuma Valley.
Beet armyworm: Moths remain active throughout the desert, especially in Texas Hill and Tacna growing areas- Staring to pick up in the south Yuma Valley.
Cabbage looper: Cabbage looper activity unusually low for mid-late September. Larvae just starting to show up in some fields.
Whitefly: Adult movement has been relatively light and about average for this time of year. Activity highest in Dome Valley.
Thrips: To date, thrips activity has been seasonably low at all trap locations; most activity found in Bard. Numbers beginning to slowly trend upward
Aphids: No aphids have been caught on traps thus far. Normal for this time of year. Still early, anticipate they will begin to show up in October.
Leafminers: Adult activity below normal for September, but moderate numbers caught in Wellton and south Gila Valley in areas where cotton was recently harvested and disked under.
