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Effects of a Neem Compound on the Fecundity and Longevity of Ceratitis capitata (Diptera: Tephritidae)

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A commercial formulation of neem was tested on adult Ceratitis capitata (Wiedemann) to determine its effects on fecundity and longevity. Four no-choice tests were carried out in the laboratory at constant conditions of temperature, humidity, and photoperiod. Different concentrations were tested mixing neem solutions with the adult’s rearing diet. The laboratory tests showed that neem significantly reduced fecundity by interfering with oogenesis, which resulted in a complete and irreversible sterility of females. A slight reduction of longevity was also observed. The number of eggs laid decreased with increasing concentrations of azadirachtin in the diet. Preliminary histological observations indicated that the oviposition decrease was the result of a block in ovarian activity. Additional tests confirmed that azadirachtin induced sterility in the females, even when the flies were exposed for shorter periods (24 h).

Keywords: Ceratitis capitata; fecundity; fertility; longevity; neem

Document Type: Research Article

Publication date: February 1, 1999

More about this publication?
  • Journal of Economic Entomology is published bimonthly in February, April, June, August, October, and December. The journal publishes articles on the economic significance of insects and is divided into the following sections: apiculture & social insects; arthropods in relation to plant disease; forum; insecticide resistance and resistance management; ecotoxicology; biological and microbial control; ecology and behavior; sampling and biostatistics; household and structural insects; medical entomology; molecular entomology; veterinary entomology; forest entomology; horticultural entomology; field and forage crops, and small grains; stored-product; commodity treatment and quarantine entomology; and plant resistance. In addition to research papers, Journal of Economic Entomology publishes Letters to the Editor, interpretive articles in a Forum section, Short Communications, Rapid Communications, and Book Reviews.
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