Nontarget Impact of Spinosad GF-120 Bait Sprays for Control of the Mexican Fruit Fly (Diptera: Tephritidae) in Texas Citrus

Abstract Bait sprays containing the toxicant spinosad (GF-120) were applied to citrus groves in the Rio Grande Valley of Texas where Mexican fruit flies were detected in surveillance traps. The sprays were applied as a supplement to a continuous sterile insect release program. Sterile fly captures were 47–63% lower in the treated groves compared with control groves. Eight of 10 secondary pest populations declined in the test groves subsequent to spray applications, but they also declined in the control groves, suggesting that the decline was a seasonal phenomenon rather than a result of the bait sprays. Citrus whitefly, Dialeurodes citri (Ashmead), populations increased modestly and citrus blackfly, Aleurocanthus woglumi (Ashby), populations remained unchanged compared with pretreatment levels. Thus, no outbreaks of secondary pests occurred as a result of the spinosad bait sprays in this instance, as has been reported for malathion bait sprays in citrus. The bait sprays had no detectable effect on populations of specific indicator species of parasitoids (including Aphytis spp. and Comperiella bifasciata Howard), or on numbers of beneficial insects in general, in the treated groves.

[1]  J. Stark,et al.  Toxicity of Spinosad in Protein Bait to Three Economically Important Tephritid Fruit Fly Species (Diptera: Tephritidae) and Their Parasitoids (Hymenoptera: Braconidae) , 2004, Journal of economic entomology.

[2]  T. Williams,et al.  Is the Naturally Derived Insecticide Spinosad® Compatible with Insect Natural Enemies? , 2003 .

[3]  J. Michaud.  Toxicity of fruit fly baits to beneficial insects in citrus. , 2003, Journal of insect science.

[4]  V. J.L.Leyva,et al.  Toxicidad sobre Apis mellifera de cebos empleados en el combate de moscas de la fruta , 2003 .

[5]  Hong Chen,et al.  Laboratory evaluation of surface residue toxicity of insecticides to apple maggot flies , 2003 .

[6]  R. Prokopy,et al.  Attraction and feeding responses of Mediterranean fruit fly and a natural enemy to protein baits laced with two novel toxins, phloxine B and spinosad a , 2002 .

[7]  D. Goulson,et al.  Toxic effects of spinosad on predatory insects , 2002 .

[8]  R. E. Burns,et al.  Efficacy of spinosad bait sprays to control mediterranean and Caribbean fruit flies (Diptera: Tephritidae) in commercial citrus in Florida , 2001 .

[9]  S. Peck,et al.  Potential for Areawide Integrated Management of Mediterranean Fruit Fly (Diptera: Tephritidae) with a Braconid Parasitoid and a Novel Bait Spray , 2001, Journal of economic entomology.

[10]  R. Mangan,et al.  Novel insecticide strategies such as phototoxic dyes in adult fruit fly control and suppression programmes. , 2000 .

[11]  S. Peck,et al.  Field Tests of Environmentally Friendly Malathion Replacements to Suppress Wild Mediterranean Fruit Fly (Diptera: Tephritidae) Populations , 2000, Journal of economic entomology.

[12]  Donald B. Thomas.  Degree-Day Accumulations and Seasonal Duration of the Pre-Imaginal Stages of the Mexican Fruit Fly (Diptera: Tephritidae) , 1997 .

[13]  R. Dowell,et al.  Laboratory toxicity of a photo activated dye mixture to six species of beneficial insects , 1997 .

[14]  K. Hoelmer,et al.  Effects of Malathion Bait Spray on Aleyrodes spiraeoides (Homoptera: Aleyrodidae) and Its Parasitoids in Northern California , 1993 .

[15]  D. Papaj,et al.  Behavioral responses of Ceratitis capitata flies to bait spray droplets and natural food , 1992 .

[16]  J. Woolley,et al.  Influence of trap color and San Jose scale (Homoptera: Diaspididae) pheromone on sticky trap catches of 10 aphelinid parasitoids (Hymenoptera). , 1990 .

[17]  H. Browning,et al.  Morphometric analysis of uniparental Aphytis reared from chaff scalec Parlatoria pergandii Comstockc on Texas citrus lHymenopterac Aphelinidaes Homopterac Diaspididaer , 1987 .

[18]  W. Gregory,et al.  Flight Response of Aphytis melinus (Hymenoptera: Aphelinidae) and Scirtothrips citri (Thysanoptera: Thripidae) to Trap Color, Size, and Shape , 1984 .

[19]  P. Endicott,et al.  Effect of malathion-bait sprays on biological control of insect pests of olive, citrus, and walnut. , 1984 .

[20]  R. G. Troetschler.  Effects on Nontarget Arthropods of Malathion Bait Sprays Used in California to Eradicate the Mediterranean Fruit Fly, Ceratitis capitata (Wiedemann) (Dystera: Tephritidae) , 1983 .

[21]  J. French,et al.  Development of Integrated Pest Management in Texas Citrus. , 1983 .

[22]  R. Cherry,et al.  SURVEY TRAPS FOR PARASITOIDS, AND COCCINELLID PREDATORS OF THE CITRUS BLACKFLY, ALEUROCANTHUS WOGLUMI 1 , 1981 .

[23]  D. Chambers,et al.  Control of the Mexican Fruit Fly by Bait Sprays Concentrated at Discrete Locations , 1969 .

[24]  T. Southwood,et al.  Ecological Methods with particular reference to the study of insect populations , 1967, Pedobiologia.

[25]  W. A. Simanton.  Operation of an Ecological Survey for Florida Citrus Pests , 1962 .

[26]  E. F. Knipling.  Use of Insects for Their Own Destruction , 1960 .