Onion rust prevention measures
Reasonable rotation. In the same area, it is not appropriate to plant shallots on the same land. It should generally be changed every year. In the absence of rotation conditions, it should not be continued after the occurrence of rust.
Basal fertilizer should be applied before transplanting. Onion field can be used to compost pig manure or NPK compound fertilizer + plant e-pharmaceuticals, and after turning ripe and stir evenly, then transplanting young onions. Spraying new high-fat film timely after transplanting can effectively prevent the ground water from evaporating. Body water does not transpire, isolate pests and diseases, and shorten the period of seedlings.
Timely drug control. In the spring, especially in the case of continuous rain and rain for 2-3 days, timely check the occurrence of shallot rust, if you find brown green spots on the onion leaf immediately to fight drugs, generally available 25% triadimefon EC 3000 Dosage + plant cell immune factor spray, after the first application, every 7-10 days need to prevent and control again, in order to improve the control effect.
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