Location: Subtropical Horticulture Research
2009 Annual Report
Fruit fly antennal response to the fruit fly lure putrescine. Research was conducted to measure antennal olfactory response of caribflies to commercial putrescine lures. Antennal response was correlated with female physiological state and with behavioral response in flight tunnel bioassays. Immature females have a stronger response to ammonia bicarbonate but mature females have a stronger response to putrescine. Bioassays found that addition of putrescine to ammonia bicarbonate increased female-biased attraction of caribflies. This study is part of ongoing research to optimize monitoring programs used by action agencies for early detection of invasive fruit fly pests.
Fruit fly antennal response to 3-methyl-1-butanol. Scientists found that 3-methyl-1-butanol (MB) is attractive to female caribflies in laboratory bioassays. Research was conducted to quantify caribfly antennal response to MB, including male and female dose response curves, potential additive effects with known attractants, and effect of female physiological state an antennal response. MB is a volatile chemical emitted from bacteria, a food source for adult fruit flies. This research will add to our knowledge on fruit fly attractants and development of improved trapping systems.
Field tests to compare effectiveness of standard fruit fly baits for capture of caribflies. Field trials that were conducted in two caribfly host tree plantings determined the relative capture of caribflies in these different fruit fly trapping systems. Traps baited with the two component food-based synthetic attractant developed by station scientists captured the most caribflies, but there was no difference in capture in traps baited with either the food-based synthetic attractant used for medflies or with the liquid protein attractant also used for caribflies. The lowest capture was in traps baited with the liquid protein attractant used for medflies.
Development of artificial diet for the pest weevil, Myllocerus undecimpustulatus undatus. The Myllocerus weevil causes heavy damage to foliage in landscape plantings and is becoming a pest of citrus as it moves into counties in Florida that were previously weevil-free. Ability to rear this weevil on artificial diet is needed for development of a semiochemical-based trapping system; however, there is poor larval survival on available artificial diets. Studies were conducted to test modifications to the diet and rearing environment for improved ability to rear this weevil, which would provide the numbers needed for subsequent research.
Amarasekare, K.G., Chong, J., Epsky, N.D., Mannion, C. 2008. Effect of Temperature on the life history of the mealybug, Paracoccus marginatus (Hemiptera: Pseudococcidae) under laboratory conditions. Journal of Economic Entomology 101(6):1798-1804.
Kendra, P.E., Epsky, N.D., Montgomery, W.S., Heath, R.R. 2008. Response of Anastrepha suspensa (Diptera: Tephritidae) to terminal diamines in a food-based synthetic attractant.. Environmental Entomology 37:1119-1125
Epsky, N.D., Walker, A., Kendra, P.E. 2009. Sampling methods of Myllocerus undecimpustulatus undatus (Coleoptera: Curculionidae) adults. Florida Entomologist. 92:388-390.
Heath, R.R., Lavallee, S.L., Schnell, E.Q., Midgarden, D.G., Epsky, N.D. 2009. Laboratory and field cage studies on female-targeted attract-and-kill bait stations for Anastrepha suspensa (Diptera: Tephritidae). Pest Management Science. 65:672-677.