Whitefly is the main pest of greenhouse cucumbers, tomatoes, peppers, eggplants, and kidney beans. The yield loss of the heavily damaged fields is over 30%. When the greenhouse white mites occur, the chemical control should be combined with the prevention and control indicators, such as more than 10 white mites in each leaf of the tomato, 50 to 60 heads per leaf of the cucumber, and the high-efficiency and low-toxic pesticides can be selected. There are the following: 2.5% è™± è™± å¯ WP 2500~3000 times liquid can control eggs, nymphs and adults; 2.5% kungfu emulsifiable oil 2000~3000 times liquid, better mixed with phlegm; 25% good winter 2000~2500 times of emulsifiable concentrate, 2500~3000 times of avermectin emulsifiable concentrate or 2.5% of cyfluthrin emulsifiable concentrate 3000 times.
The above-mentioned effective medicaments should be rotated to reduce the occurrence of drug resistance. The selected agents are sprayed on the back of the leaves, sprayed once every 5 to 7 days, and even sprayed 3 to 4 times, the control effect is above 98%.
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