Effects of a neem compound on the fecundity and longevity of Ceratitis capitata (Diptera: Tephritidae)

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 mixi...

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Bibliographic Details
Published in:Journal of economic entomology 1999-02, Vol.92 (1), p.76-82
Main Authors: Di Ilio, V, Cristofaro, M, Marchini, D, Nobili, P, Dallai, R
Format: Article
Language:English
Subjects:
azadirachtin
Biological and medical sciences
Biological control
Ceratitis capitata
Control
dose response
fecundity
female fertility
fertility
Fundamental and applied biological sciences. Psychology
histopathology
insect control
longevity
neem seed extract
ovaries
oviposition
persistence
Phytopathology. Animal pests. Plant and forest protection
Protozoa. Invertebrates
Tephritidae
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Summary: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).
ISSN:0022-0493
1938-291X
DOI:10.1093/jee/92.1.76