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Black spot disease
It is a common disease of radish, distributed everywhere, and the diseased plant rate can reach 80%-100% in severe cases
Prevention method:
Before sowing, use 50% Fumeishuang WP, or 50% Isoflumuron WP to dress the seeds
Spray 500-600 times of 75% chlorothalonil WP before or at the beginning of the disease, or 1,000 times of 50% Isoflumuron WP, or 1,500 times of 50% Pythium WP, or 58% of methyl methacrylate Cream·Manganese-Zn WP 500 times, or 64% Evil Cream·Manganese-Zn WP 500 times
downy mildew
Downy mildew is a major disease of radish, resulting in a serious decline in yield and quality
Prevention method:
Rotate every other year with non-cruciferous crops;
Pay attention to ventilation and light transmission in the seedbed, and do not use low wetlands for seedbeds;
In low wetlands, high-furrow ridge farming is adopted;
In the early stage of the disease or when the central diseased plant appears, spray it immediately to protect it.
If the weather is dry after spraying, there is no need to spray again.
aphid
Mainly damage the leaves of radish
Control method: 10% imidacloprid WP 1000-2000 times solution or 50% aphid mist WP 3000-4000 times solution can be used for control
cabbage caterpillar
The adult cabbage caterpillar lays eggs on the back of the leaves, like vertical wheat grains.
