New measures for prevention and management of mustard white rust

White rust of mustard is mainly harmful to the leaves. The diseased spots on the leaves are light yellow-green and the edges are not obvious. The lesions are born on both sides of the leaves, mainly in the small spots of the leaf back lesions expanding into white ridges. After ripening, the skin ruptures and emits a lot of white powder. In severe cases, the lesions cover the entire leaf surface and cause the leaves to turn yellow. The pathogens mainly overwinter on the diseased bodies and seeds in the soil.

Prevention

1. Select resistant varieties, mix with new high-fat membrane before planting; and carry out two-year rotation with non-cruciferous vegetables, timely remove residual residues from the previous crops, spray disinfectant and add new high-fat membrane to disinfect the soil. At the same time, deep-cultivation of the soil, fertilization, and the creation of a soil environment conducive to the growth of mustard.

2, in the growth period of mustard greens, reasonable fertilization, and time seedlings, strengthen ventilation and light, scientific irrigation, to avoid water accumulation in the field after the rain, and in the bud period, spray the strong stems can make the plant stems thick, leaves thick, The leaves are fresh and tender, the plants are lush, and the natural taste is strong. At the same time, it can improve the ability to resist disasters, reduce the amount of pesticides and fertilizers, and reduce residual poisons.

3, chemical control, in the early stage of the disease should be sprayed according to plant protection requirements 25% metalaxyl WP 1000 times liquid, 75% chlorothalonil WP 600 times liquid and other agents spray control, spray once every 7 days, continuous Control the spraying 2 to 3 times, and at the same time, according to the plant protection requirements, spray a new high-lipid film 800 times to improve the utilization rate of the active ingredients.

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