Carbaryl and Copper Oxychloride

Powdery mildew in cucumbers causes a white powdery growth on the upper surfaces of leaves and on the stems of infected plants. Infected areas are often stunted and distorted and may drop prematurely from the plant. Fruits are usually not directly affected, but their size and growth may be stunted

chemicals that can be used to treat powdery mildew are carbaryl and copper oxychloride

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