Cold and hot water leaf extracts of papaya (melon tree, pawpaw) (Carica papaya L.) were effective in reducing the growth of powdery mildew fungi in vitro and in reducing the spread of powdery mildew disease on pepper plants. The toxicity of cold water leaf extracts of papaya to fungi was greater than that of hot water extracts, suggesting the bioactive extract could be heat sensitive. Leaf extracts of papaya have the potential for control of powdery mildew disease of pepper in the field.
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A. C. Amadioha (1998) studied this question.
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