Chinese cabbage seed treatment

Many diseases of Chinese cabbage are caused by seed-borne bacteria, so it is necessary to disinfect the seeds before sowing. The method is:
1. Downy mildew: Seed dressing with 75% chlorothalonil or 25% metalaxyl WP, the dosage is 0.3-0.4% of the seed weight.
2. Black spot: Seed dressing with 50% thiram or 70% mancozeb wettable powder with 0.4% seed.
3, black rot: soak seeds with 50 ~ C warm water for 20 minutes, or 50% dynam ammonium 200 times liquid soaked for 15 to 20 minutes, washed and dried to sow.
4, soft rot: seed amount of 0.3 ~ 0.4% of 50% succinic acid copper or 60% sulphur copper? ethyl phosphine aluminum WP powder seed dressing.

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