On Wednesday October 9th, a Brussels sprout plant sample was submitted to our Entomology laboratory for insect identification. At the naked eye, we observed some webbing and specks on the leaf (See Fig. 1). Fig. 1. Leaf of Brussels sprout showing some webbing and 'specks'.
During the past two years acreage of season-long drip in lettuce has increased rapidly in the Salinas and adjacent valleys. Using drip for the entire crop cycle allows growers to germinate seeded crops with buried tape (Photo 1), and eliminates labor needed for installing and removing sprinklers.
Last year, this pest was present in large numbers during August and September. The idea is to have additional data from the pheromone traps to inform the IPM decision making process. Below is a table showing the number of moths per day and per trap since February. Table 1.
