1. After the foliar-sprayed peanuts enter the full fruit ripening stage, due to the aging of the root system, the absorption capacity is reduced, and the nodule nitrogen fixation and nitrogen supply capacity are weakened, often due to defertilization causing early defoliation. The absorption ability of the leaf surface of peanuts is enhanced in the later period, and timely multiple spraying fertilizers can effectively supplement nutrients and postpone defoliation, which has many advantages such as rapid action, high absorption and utilization rate, low investment, and large benefit. The type of spray fertilizer is easy to use foliar fertilizer with more phosphorus and calcium components.
2. Prior to spraying the conditioner or sprayed conditioner, the field that does not have obvious effect is to be sprayed with 800 to 1,200 times of fluid to “strengthen the well†(be careful not to spray on the ground), which can obviously make the blade thicker. The color becomes thicker, the time for leafing is delayed, and the pods are enlarged and enriched, and the drought resistance and waterlogging resistance can be enhanced, and the premature aging caused by spraying paclobutrazol and the conditioner containing the ingredient can be reduced.
3, spray fungus leaf spot, especially net spot and brown spot is one of the main causes of early defoliation of peanuts, once it occurs, rapid spread, often within a few days a large number of leaves off, resulting in reduced production. Combined with foliar spray fertilizer, adding broad-spectrum fungicide such as “Manson Manganese Zinc†or “Methrabutin†can greatly reduce hazards and postpone defoliation. Carbendazim and bactericides based on carbendazim are not effective.
4. The main insect pests that injure insecticides in the later period are the bollworms, bridge insects and other leaf-feeding pests and leafhoppers (star spiders). The former is prone to damage under high temperature, high rainfall and high humidity, and the latter is dry in the climate. Occurrence under conditions, should pay attention to inspection, in the young stage and spotting when spray insecticide and acaricide control. For underground pests such as cockroaches, wireworms, ants, etc., based on the previous prevention and control results, if there are still larvae or infestations in the soil layer, apply a rapid extermination of insecticide powder or methyl isoflurane to the soil. Pier.
5, drainage flood control more late rain, ground water and soil cultivation layer dive too much, but also cause one of the reasons for early defoliation, severe cases may also cause rot fruit loss, timely exclusion of field water and plough layer diving . In addition, when most of the leaves fall off, the top leaves and stems turn yellow, and most of the pods must be harvested when they are full. As a result, there were more falling fruits, lower yields, and lower quality.
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