Abstract: The study was carried out to evaluate the effect of aqueous and oil extracts of jatropha (Jatropha curcas) seeds and argel (Solenostemma argel) leaves on egg-laying of the spiny bollworm (Erias insulana). The study was carried out under laboratory conditions (25-30°C and 60-70% Relative Humidity) at the Department of Crop Protection, University of Khartoum. One concentration of the aqueous and oil extracts of each plant was tested in this study viz. 10% (w/v). The potential effects of the aqueous and oil extracts of tested plants at various doses were investigated on egg-laying of the spiny bollworm. The insecticide emamectin benzoate (proclaim®) at a rate of 75 g/100L was used as standard. Control sets of treated (n-hexane) and untreated also were included. The results showed that no significant difference (P≥0.05) was detected in the mean number of eggs laid by the spiny bollworm (SBW) on okra pods sprayed with emamectin benzoate (proclaim®) and those sprayed with 10% aqueous and oil extracts of jatropha seeds and argel leaves. Significantly low (P≤0.05) mean number of eggs was laid on pod sprayed with 10% aqueous extracts of jatropha seeds (4.5), and argel leaves (1.8) compared to that laid on the untreated pod (11.8). The study recommends the use of aqueous extracts of jatropha seeds at a concentration of 10% and argel leaves at a concentration of 10%. The study also recommends the use of aqueous extracts of jatropha and argel for their ease of preparation. The study suggested other work to validate these results under field conditions.
Keywords: Extract, Oil, Aqueous, Egg-laying, Sudan.
Title: Jatropha (Jatropha curcas) and Argel (Solenostemma argel) extracts as an Oviposition inhibitor to Spiny Bollworm [Earias insulana (Lepidoptera: Noctuidae)]
Author: Mubarak Abdelrahman Salim Eisa, Hamid Ahmed Hamid, Abd Elaziz Sulieman Ahmed Ishag
International Journal of Life Sciences Research
ISSN 2348-313X (Print), ISSN 2348-3148 (online)
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