Influence of Attractants on Behavior of Screwworms (Diptera, Calliphoridae) in A Tropical Wet Forest in Costa-Rica
Journal of Economic Entomology
In a mark-release-recapture study, sheep wounds and rotted liver were used as attractants to study movements of the screwworm fly, Cochliomyia hominivorax (Coquerel), in a Costa Rican tropical wet forest in the wet season. When sites were monitored for < 1 h, liver attracted between 3 and 12.2 times more flies of both sexes than did wounds, but proportionately fewer gravid and parous females. Only 24.6% of females marked at liver sites were recaptured; seldom (3.1%) did they visit sheep wounds. Females originally marked at sheep wounds remained at the study site longer, visited both sheep and liver sites, and > 50% were recaptured. Some females were observed for 16 d and one laid four clutches of eggs. Only 8% of the marked males were recaptured and none was recaptured < 2 d later. Only a small proportion of the adult screwworms at a locality visited wounds on sentinel sheep; the majority of the adults were transient
Pathogens and Parasites
Wasps and other insects
Parker, F. D., and J. B. Welch. 1991. Influence of Attractants on Behavior of Screwworms (Diptera, Calliphoridae) in A Tropical Wet Forest in Costa-Rica. Journal of Economic Entomology 84:1468-1475.