Radwan,, E., El-Sheikh, Y. (2006). TOXICOLOGICAL AND BIOLOGICAL EFFECT OF Calendula officl'nalr's EXTRACTS ON THE COTTON LEAF WORM, SpodOptera littoralis (Bosid.). Journal of Plant Protection and Pathology, 31(2), 1045-1060. doi: 10.21608/jppp.2006.235168
Eman M. M. Radwan,; Y. W. A. El-Sheikh. "TOXICOLOGICAL AND BIOLOGICAL EFFECT OF Calendula officl'nalr's EXTRACTS ON THE COTTON LEAF WORM, SpodOptera littoralis (Bosid.)". Journal of Plant Protection and Pathology, 31, 2, 2006, 1045-1060. doi: 10.21608/jppp.2006.235168
Radwan,, E., El-Sheikh, Y. (2006). 'TOXICOLOGICAL AND BIOLOGICAL EFFECT OF Calendula officl'nalr's EXTRACTS ON THE COTTON LEAF WORM, SpodOptera littoralis (Bosid.)', Journal of Plant Protection and Pathology, 31(2), pp. 1045-1060. doi: 10.21608/jppp.2006.235168
Radwan,, E., El-Sheikh, Y. TOXICOLOGICAL AND BIOLOGICAL EFFECT OF Calendula officl'nalr's EXTRACTS ON THE COTTON LEAF WORM, SpodOptera littoralis (Bosid.). Journal of Plant Protection and Pathology, 2006; 31(2): 1045-1060. doi: 10.21608/jppp.2006.235168
TOXICOLOGICAL AND BIOLOGICAL EFFECT OF Calendula officl'nalr's EXTRACTS ON THE COTTON LEAF WORM, SpodOptera littoralis (Bosid.)
Central Agricultural Pesticides Laboratory. Agricultural Research Center. Dokki. Giza
Abstract
The present investigation was conducted to evaluate the insecticidal and
delayed effects of flowers, leaves and stems extracts of Cafendufa officfnefis plant
on the 4th instar larvae of Spodoptere fittorefr's (Boisd). The four crude extractions
(chloroform, dichloromethane. ethanol and hexane) for each part of the plant proved
high insecticidal activity against the cotton leaf worm larvae by using the residual thin
film technique. All extracts had no toxic effect on the same larvae with leaf-dipping
technique. Residual thin-film treatment of larvae with all extracts produced high
larval and total mortality. low percentage of adult emergence and sterility. Feeding
treatments reduced the pupal weight. fecundity of emerged adult females. and
hatchability of deposited eggs by these females, which was reflected in high
percentage of sterility. These delayed latent effects were more pronounced in
treatments of larvae with dichloromethane extracts.
Negligible phytotoxicity of the formulation of dichloromethane and
chloroform extracts on cotton plants. The second instar larvae were more
susceptible to the effect of the formulated extracts than that of the fourth instar.
Keywords: Plant extracts, Cafeno'ufe officfnafis, Spodopfere littorafr's. insecticidal
activities, delayed latent effects.
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