Effect of Haplophyllum tuberculatum Extracts on an Insect Pest, Spodoptera littoralis and the Predator, Coccinella undecimpunctata

[71]

Farag¹, N.A.

ABSTRACT

Petroleum ether and chloroform extracts of Haplophyllum tuberculatum at 5% concentration caused 20 and 40% mortality among tested 4^th instar larvae of Spodoptera littoralis, respectively. Petroleum ether extract also induced 20% malformation among emerged adults. Both extracts significantly reduced larval food consumption and mean weight gain, while chloroform extract revealed significant reduction in ECI (P>0.05) and also imbalance in sex ratio. Both extracts had no obvious effects on the duration of both larval and pupal stages of C. undecimpunctata, but the adult longevity was shortened significantly than the check. Significant reduction in predation capacity among 2^nd, 4^th larval instar as well as adult stage was detected. Generally chloroform extract of H. tuberculatum showed more deleterious effects than petroleum ether extract.