In the autumn, the temperature is high and the weather is arid. Black-skin wax gourd is vulnerable to horses. Therefore, attention should be paid to the prevention and control of thrips in order to protect the growing point, young shoots and young larvae. Specific prevention methods are as follows:
During seedling growth and flowering and squashing, a 1500-fold 20% imidacloprid aqueous solution, or 1500-fold 25% aqueous thiamethoxam solution, or 800-fold 0.3% aqueous solution of alizarin, or 1500 must be sprayed once every 10 to 15 days. A 10% solution of nitenpyram in water, or 2000 times of 20% spirotetramat in water, or 1000 times of a 2.5% solution of spinosad, or 2000 times of a 40% solution of acetamiprid for control, continuous spraying 3 to 5 times Spray all the leaves evenly, and pay attention to the growth point and the young larvae. It is advisable to start dropping drops of water.
Within four hours after spraying, rainwater should be flushed. Because Hummer is very susceptible to drug resistance, the agents should be used interchangeably. Do not use the same agent more than once. The addition of 0.2%~0.3% potassium dihydrogen phosphate aqueous solution and 1500 times 0.001% natural brassinosin to the liquid spray can not only improve the control effect, but also promote the growth of black melon.
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