The main diseases of Chinese cabbage include fungal diseases such as downy mildew and black spot.
Spraying 25% metalaxyl WP 800 times solution, Luheng 1 WP 600 times solution or 70% methyl thiophanate 800 times solution for 40 to 50 kg per mu, 5 to 7 days of prevention and control Then, spray 3 to 4 times. For the main bacterial diseases such as soft rot, 40 grams of chlorogenic powder can be sprayed with 30 to 40 kilograms of water per acre. Control once every 5 to 7 days, even spray 3 to 4 times.
For the main pests of aphids, cabbage caterpillars, diamondback moths, and other Chinese cabbages, it is possible to control the pollution-free pesticides such as chlorpyrifos, imidacloprid 25 wp
, 2.5% vegetable. For older larvae, 20% acaricide and 1.8% avermectin can be used for prevention and treatment.