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Specific control method: during the flowering and melon of bitter gourd, spray a 1000 times potassium permanganate aqueous solution, or 1000 times sodium bicarbonate (sodium bicarbonate) aqueous solution, or 25 to 30 times of grass ash to clarify the liquid every 7 to 10 days. Or 0.1% lime water clarification solution, etc., even spray 3 to 5 times, evenly spray all the leaves, it is advisable to start dropping with water drops, and it should be washed again with rain after four hours of spraying. In this way, the occurrence and damage of bitter gourd powdery mildew can be effectively prevented, the stems can be protected, the flowering knots can be promoted, and no toxic residues remain, and the bitter gourd is not contaminated. Spraying on the same day, it can be harvested on the same day, which is an ideal method for pollution prevention.
Bitter gourd is easy to be infected with powdery mildew during flowering and melon. When the stem is covered with white powder, the leaves are green and yellow, the growth point is curled, the plants are atrophied, causing the interval to bloom, making the young melon deformed and shortening the flowering knot. During the melon period, the yield is low and the quality is poor. It is necessary to pay attention to prevention and control.
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