Invasive Species Compendium

Detailed coverage of invasive species threatening livelihoods and the environment worldwide

Abstract

Insect growth regulators as chemosterilants for Ceratitis capitata (Diptera: Tephritidae).

Abstract

The insect growth regulators (IGRs) lufenuron, triflumuron, diflubenzuron, benzylphenol J2644 [of unstated composition], cyromazine, pyriproxyfen, methoprene, azadirachtin, fenoxycarb, and buprofezin were tested as chemosterilizing agents against Ceratitis capitata. The IGRs were administered to adult flies mixed with their food. The phenyl-benzoyl ureas with fluorinated alkoxy substituents in the phenyl group showed the highest activity as hatching inhibitors. A 1000 ppm concentration of lufenuron given to adult females (virgin or mated) for 3 h produced a total suppression of egg hatch. The same sterilizing activity was observed in females that copulated with males treated with lufenuron in the food at 5000 ppm for 3 h. The sterility of treated females continued for at least 25 days after treatment. Triflumuron caused a total suppression of egg hatch when administered to females at 10 000 ppm for 3 days. The sterilant activity of the other IGRs was low compared to that of lufenuron and triflumuron. Lufenuron is proposed as a suitable substitute of organophosphates against C. capitata.