Influence of Interval Between Postharvest Lettuce Residue Management and Subsequent Seeding of Broccoli on Cabbage Maggot (Diptera: Anthomyiidae) Infestation on Broccoli.

摘要: Larval stages of cabbage maggot, Delia radicum (L.) (Diptera: Anthomyiidae), attack the roots Brassica crops and cause severe economic damage. In Salinas Valley California, are often planted after successive lettuce (Lactuca sativa L.) crops. The interval between postharvest soil incorporation residue subsequent crop can be as short 7 d, which could influence D. infestation on broccoli (Brassica oleracea var. italica Plenck). 2014 2015, effect intervals (IBC) was evaluated. treatments were 7, 20, 33, 48 d IBC, NL (no lettuce), 21, 36, 49 IBC in respectively. Insect counts feeding damage assessed during 3–6 wk planting. Adult fly captures significantly greater at than 36–49 both years. years, eggs collected 33 or 36 plots. Larvae all other 2014, but not 2015. Similarly, severity injury with no prior had lower flies egg densities 21 IBC. implication these results a cultural control tactic for is discussed.