Recovery of natural insecticide fromTephrosia vogelii. I. Efficiency of rotenoid extraction from fresh and oven-dried leaves
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Comparisons were made among several methods of rotenoid extraction from dry and freshTephrosia leaves. Significantly more rotenoids were recovered from fresh leaves than from dried leaves. Loss of rotenoids during drying was assumed to be the cause for lower rotenoid recovery from dry leaves. Several extraction methods for fresh leaves were found to be significantly better than the currently used Soxhlet procedure.
KeywordsRotenone Fresh Leaf Leaf Material Cold Extraction Soxhlet Method
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