aphid
Aphids are very fertile and can breed for many generations a year. A large number of locusts often gather on kale leaves and tender stalks to suck juice.
Control methods When the locust starts, it can spray 40% omethoate, dimethoate 1000-1500 times solution or phoxim emulsion 1000-1500 times solution.
The leaf roller moth, commonly known as leaf leafworm, is harmed by its larvae leaf curls, and often the leaf is rolled up with silk and hidden in it for feeding hazards.
Prevention and control method 1. In the winter, the dry grass and leaves around the planting site should be cleaned and burned to eliminate the overwintering parasites. 2. When the galls with leafy moth are found, the larvae in the leaf should be removed or directly crushed; 3. When it happens, it can spray 50% killer pine or 80% of dichlorvos or 50% of zinc-phosphorus 1000-1500 times. Naphthalene WP can also be sprayed 1000-2000 times.
cabbage caterpillar
The adults of Pieris rapae are active during the day, the eggs are produced on the back of the leaves, and the larval populations feed on the leaves. After 3 years of age, the harm was dispersed and sooner or later it was taken from the leaves, leaves or tender shoots, and the injured leaves were indented.
Control methods can catch larvae manually. When there are a large number of larvae, 80% of dichlorvos EC or 1000-1500 times of locust pine should be sprayed in time. Spraying with 40% omethoate 1500-2000 times also has some effect.
Soft rot
In the early stage of soft rot, 70% thiophanate-methyl wettable powder can be used to water 600 times, or 70% mancozeb WP can be sprayed with 500 times water.
Downy mildew
In the early stage of the onset of downy mildew, 50% Suo Ke Ling WP can be diluted 1000-1200 times, or 58% Metalaxyl Manganese Zinc WP can be sprayed with 500 times water.
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