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Deployment and utility of traps for management of Rhagoletis mendax (Diptera: Tephritidae)


, : Deployment and utility of traps for management of Rhagoletis mendax (Diptera: Tephritidae). Journal of Economic Entomology 88(1): 134-139

Seasonal captures of adult blueberry maggot, Rhagoletis mendax Curran, on Pherocon AM traps increased 1.8-fold when traps were protected from the prevailing winds compared with exposed sites, and 1.7-fold when berries were < 3 m from a trap compared with > 3 m, based on plots in 11 commercial lowbush blueberry fields in New Brunswick and Nova Scotia in 1982. Four-fold more adults were captures when traps were placed in fields containing blueberries than in vegetative fields; captures were 3-fold higher with traps placed in sheltered than exposed locations, and 6-fold higher in weedy than in weed-free locations based on studies in 13 fields in New Brunswick sampled unequally for 6 yr. A logistic curve described cumulative trap captures of adults from 19 fields for 2 yr. The capture rate during the season decreased from New Brunswick to northern Nova Scotia to western Nova Scotia, but the date of 50% capture was similar for all regions The first adult was caught before the first blue-colored berry was observed in 39 fields over 4 yr. Dimethoate reduced infestation to less than one larva per liter of fruit when applied within 10 d of the first mature female capture. Trap captures of adults within 5 d after a pesticide application reliably predicted continued blueberry maggot pressure in 20 fields with low (0-5) through high (> 20) prespray captures monitored for 2 yr.

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Accession: 002590566

DOI: 10.1093/jee/88.1.134

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