The main insect pest of zucchini is thrips. Thrips are tiny, and both larvae and adults damage the plant. The heart leaves of the infested plants cannot open, and the shoots and young leaves are curled up. If the growing point is victimized, the growth of the plant will be inhibited, often twisted into a daisy-like shape. Young melons become deformed and the skin of the melon becomes rough and dark brown, which seriously affects the yield and quality of the fruit. Thrips can fly and jump, climb and move quickly, have a high reproduction coefficient, and grow at temperatures between 25℃ and 30℃. The less rainfall in this temperature range, the more serious the infestation will be. The occurrence of thrips in Guangzhou is from April to September, with the most serious occurring from late July to September. Prevention and control should be in the "early" word on the effort, timely spraying control, available 50% Bataan 800 ~ 1000 times liquid, kill insect double 400 ~ 800 times liquid, 20% KangFuDuo emulsion 6,000 ~ 10,000 times liquid, in the plant grows to 7 ~ 8 true leaves when the beginning of spraying prevention and control, every 5 days ~ 7 days spraying 1 time, spraying 5 ~ 6 times, agents should be to the late July to September, the most serious. 5～6 times, the agent should be used alternately.