Due to the special growing season, Chinese cabbage cultivated in the off-season often suffers from downy mildew, soft rot, white spot disease and other pests such as aphids, diamondback moth and cabbage caterpillar.
For the disease, it is mainly used for rotation, avoiding the application of unfertilized farmyard manure, rational fertilization and irrigation, minimizing root damage, leaf damage, and preventing pests and wounds.
After the occurrence of the mites, timely use 40% dimethoate emulsion 1000 - 1500 times solution for prevention. For cabbage caterpillars and Plutella xylostella, 1000 times of Bt emulsion can be used to spray before the ball is formed. Insect-proof spray should be sprayed continuously for 2 - 3 times, with an interval of 10 - 15 days to prevent phytotoxicity.
More pesticide knowledge , please pay attention to China Pesticide Network
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