The first is a reasonable rotation. In the same piece of land, it is not advisable to plant the shallots in the same way. Generally, it should be changed every year, and the generals should be sprayed and disinfected in the field to reduce the source of the bacteria. In the absence of rotation conditions, it should also be continued after the occurrence of rust.
The second is to apply enough base fertilizer before transplanting. Each acre of onion field can be used to simmer 3000 kg of pig manure, 45% of NPK compound fertilizer 25 kg, and after transplanting and kneading, transplant the young onion. After transplanting, the planting water should be timely poured and sprayed high. The lipid film 800 times liquid can effectively prevent the moisture on the ground from evaporating, the moisture of the seedlings is not transpiration, the pests and diseases are isolated, the seedling period is shortened, the new environment is quickly adapted, and the growth is healthy.
The third is to improve the disease resistance of onion plants. In addition to doing field management work such as drought resistance and waterlogging, in the pathogenesis of scallions, 15-20 kg of ammonium bicarbonate should be applied per acre, and the stalks can be sprayed at the appropriate stage of the growth of the shallots to make the stems strong and leaves. It is rich in fat, fresh in leaves, lush plants, and rich in natural taste. At the same time, it can improve the ability to resist disasters, reduce the amount of pesticides and fertilizers, and reduce residual poisons.
The fourth is timely drug use and prevention. In the growing season of scallions, it is necessary to check the occurrence of scallion rust in 2-3 days. If it is found that there are brown and green spots on the onion leaves, it is necessary to fight immediately. Generally, 25% triadimefon emulsifiable concentrate 3000 times can be used. One quarter of the washing powder needs to be controlled once every 7-10 days, and the application of the new high-fat film 800 times liquid to improve the utilization rate of the active ingredients of the medicament, and to consolidate the valuation effect.
Website: Symptoms of Scallion Rust and Prevention and Control of Rust
Steroids,Corticosteroids,S4 Steroids Capsules,Steroid M K677
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