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J Econ Entomol


Title:Toxicity of spinosad in protein bait to three economically important tephritid fruit fly species (Diptera: Tephritidae) and their parasitoids (Hymenoptera: Braconidae)
Author(s):Stark JD; Vargas R; Miller N;
Address:"Washington State University, Puyallup Research and Extension Center, Puyallup WA 98371, USA"
Journal Title:J Econ Entomol
Year:2004
Volume:97
Issue:3
Page Number:911 - 915
DOI: 10.1603/0022-0493(2004)097[0911:tosipb]2.0.co;2
ISSN/ISBN:0022-0493 (Print) 0022-0493 (Linking)
Abstract:"The feeding toxicity of the natural insecticide spinosad in Provesta protein bait was evaluated for three economically important fruit fly species, the Mediterranean fruit fly, Ceratitis capitata (Wiedemann); the melon fly, Bactrocera cucurbitae Coquillett; and the oriental fruit fly, Bactrocera dorsalis Hendel. Both females and males were evaluated. Spinosad was remarkably similar in toxicity to all three fruit fly species. Male C. capitata (24 h LC50 values and 95% fiducial limits = 2.8 [2.60-3.0] mg/liter spinosad) were significantly, although only slightly more susceptible to spinosadthan females (4.2 [3.8-4.6] mg/liter). Male (5.5 [4.7-6.6] mg/liter) andfemale (4.3 [3.7-4.9] mg/liter) B. cucurbitae were equally susceptible to spinosad. Female (3.3 [3.1-3.6] mg/liter) and male (3.1 [2.9-3.3] mg/liter) B. dorsalis also were equally susceptible to spinosad. Provesta bait containing spinosad also was evaluated against two parasitoids of tephritid fruit flies, Fopius arisanus (Sonan) and Pysttalia fletcheri (Silvestri). These parasitoids did not feed on the bait, so a contact toxicity test was conducted. Significant amounts of mortality were found only after exposure of parasitoids to spinosad-coated glass vials with concentrations > or =500 mg/liter spinosad. Parasitoids were less susceptible than fruit flies to such a degree that use of spinosad in bait spray should be compatible with these parasitoid species. Because the fruit flies tested in this study were so susceptible to spinosad, this product seems to be promising as a bait spray additive and a replacement for malathion for control of these species"
Keywords:"Animals Drug Combinations Female Hymenoptera/*drug effects Insecticides/*toxicity Macrolides/*toxicity Male *Pest Control, Biological Pheromones Proteins *Tephritidae;"
Notes:"MedlineStark, John D Vargas, Roger Miller, Neil eng Research Support, U.S. Gov't, Non-P.H.S. England 2004/07/29 J Econ Entomol. 2004 Jun; 97(3):911-5. doi: 10.1603/0022-0493(2004)097[0911:tosipb]2.0.co; 2"

 
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