What are the control methods for autumn mustard mildew:
Downy mildew pathogens mainly live on the seeds by hyphae, and in the next year, they infect the seedlings. It is mainly spread by wind and rain, insects, etc., and it will spread quickly if it is not prevented.
1. Select disease-free and disease-resistant varieties and use fungicides to effectively kill the residual bacteria on the seeds and reduce the source of downy mildew infection. Sowing at the right time, rationally planting, spraying new high-fat film after seedlings are unearthed, can isolate pathogen infection, improve the ability of mustard to resist natural disasters and photosynthesis, and protect seedlings from growing.
2, and time seedlings, seedlings, combined with the seedlings to clear the field diseased seedlings, diseased plants, etc., brought out the field to be destroyed, and the entire park sprayed the tree generals to disinfect, reducing the field of infection.
3, in the early stage of the disease, timely spraying of targeted drugs for prevention and treatment, and with the new high-lipid film 800 times liquid, can improve the control effect multiple times, prevent rainwater washout, reduce the dosage per acre.
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