Abstract
This laboratory study was conducted to evaluate the biocidal effect of Crataeva religiosa (Capparidaceae) on eggs and adults of Caryedon serratus. An aqueous formulation obtained by maceration at 50 degrees was used in three concentrations 0.2kg/L, 0.1kg/L, 0.06kg/L. The results reveal that the extracts of C. religiosa showed a rather remarkable ovicidal activity which varies from 41.66% in C1 and C2 to 38.88% in C3. A very important nymphal activity of 88.88% was also noted with the highest dose. The monitoring of surviving eggs showed a lengthening or a shortening of the different development durations and an imbalance of the sex ratio in favor of females. The adulticidal activity showed mortality spread over time of all doses. The extracts of C. religiosa showed a fairly high adulticidal activity of 53.33% in C1, 40% in C2 and 46.66% in C3. A reduction in the fecundity of females treated with all doses was also noted and a balance in the sex ratio of survivors from treated adults.
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