Response of female Ceratitis capitata (Diptera: Tephritidae) to a spinosad bait and polymer matrix mixture with extended residual effect in Hawaii.
The effectiveness of foliar applications of protein baits against pestiferous fruit flies (Tephritidae) can be adversely affected by a rapid loss of attractive volatile compounds and by rainfall due to the high water solubility of the baits. In a large coffee, Coffea arabica L., plantation in Hawaii with high and low populations of Mediterranean fruit fly, Ceratitis capitata (Wiedemann) (Diptera: Tephritidae), the relative attractiveness of GF-120 NF Naturalyte Fruit Fly Bait as either a 40% (vol:vol) spray solution (= GF-120 NF) or as a formulated proprietary amorphous polymer matrix (= GF-120 APM) was compared. The GF-120 APM formulations contained either, 25, 50, or 75% of GF-120 NF (wt:wt). All baits were tested in association with visually attractive yellow bait stations as a way of standardizing the evaluations. With both high and low C. capitata populations, significantly more females were attracted to the fresh sprayed GF-120 NF than to any of the three fresh GF-120 APM formulations. The attractiveness of GF-120 sprayed decreased significantly after 1 wk, whereas 1-wk-old GF-120 APM formulations were as attractive as similar fresh formulations. GF-120 APM 75% aged for 3 wk outperformed similarly-aged sprayed GF-120 NF with comparatively high C. capitata populations. With low populations, both GF-120 APM 75% and GF-120 APM 50% aged for 2 wk outperformed the similarly aged sprayed GF-120 NF. Combined findings indicate that APM mixed with either 50 or 75% GF-120 applied to bait stations can be attractive to female C. capitata for up to 3 wk longer than the standard sprayed GF-120 NF.
College of Tropical Agricultural Human Resources, University of Hawaii at Manoa, 3050 Maile Way, Honolulu, HI 96822, USA. pineroj@lincolnu.edu
Jaime C
JC
Piñero
Steven K
SK
Souder
Luis E
LE
Gomez
Ronald F L
RF
Mau
Roger I
RI
Vargas
D000704:Analysis of Variance; D000818:Animals; D033622:Ceratitis capitata / Q000187:drug effects*; D003069:Coffee; D004338:Drug Combinations; D004777:Environment; D005260:Female; D006254:Hawaii; D007300:Insect Control / Q000379:methods*; D007306:Insecticides / Q000008:administration & dosage / Q000494:pharmacology*; D018942:Macrolides / Q000008:administration & dosage / Q000494:pharmacology*; D008297:Male; D010675:Pheromones / Q000008:administration & dosage / Q000494:pharmacology*; D011108:Polymers / Q000008:administration & dosage; D011156:Population Density; D012621:Seasons; D013997:Time Factors
D003069:Coffee; D004338:Drug Combinations; D007306:Insecticides; D018942:Macrolides; D010675:Pheromones; D011108:Polymers; C010411:insect attractants; C415329:spinosad