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Prevention and cure of vegetable pests and diseases in greenhouses
The technology can effectively overcome the disadvantages of traditional spray and smoke control methods such as laborious, time-consuming, large dosage, poor effect, etc., and cucumber, tomato white powder, anthrax, gray mold, angular spot, early plague, and late blight in greenhouses. As well as locusts, whitefly and other pests have a more ideal control effect. Application methods: 1. The dust agent used 6.5% metalaxyl or 5% chlorothalonil complex agent. 2. The spraying equipment adopts domestically-produced 5 or 10 hand-type powder dusters. No fan-shaped dusting cover is used during operation to allow the powder to be ejected directly from the pipe. 3. The dusting method adopts the reverse spraying method, that is, spraying from the end of the greenhouse to the air, so that the powder spraying pipe swings uniformly around the upper and lower, and the operator retreats at the speed of 11 meters per minute to the exit, and Close the shed door. Spraying time should be selected before 9 o'clock in the morning or after 16 o'clock in the afternoon. Avoid powder spraying at noon on the sunny day and do not spray within 3 days after spraying.