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Peanut fruit ripening period management
1. Foliar sprayed peanuts enter the full-fruit ripening stage. Due to root aging, the absorption capacity is reduced and the nitrogen fixation and nitrogen supply capacity of the nodules are weakened, and early leaves are often caused by de-fertilization. The late leaf surface absorptive capacity of peanuts is enhanced. In time, foliar spray fertilizer can effectively supplement nutrients and delay the leaves, which has many advantages such as rapid action, high absorption and utilization rate, low input and great benefits. The type of spray fertilizer is easy to use foliar fertilizer with more phosphorus and calcium components.
2, the field has not been sprayed before the regulator or the spray has not been obvious, it must be sprayed once 800 ~ 1200 times liquid "strong and full" (note not to spray on the ground), can significantly thicken the leaves, leaves The color becomes thicker, delays the defoliation time, accelerates the expansion and enrichment of the pod, and can enhance the drought resistance and the stagnation resistance, and alleviate the premature aging caused by the spraying of paclobutrazol and the regulator containing the component.
3, spray fungicide leaf spot disease, especially net blotch and brown spot disease is one of the main causes of early leaves of peanuts. Once it occurs, it spreads rapidly, and often leaves a large number of leaves within a few days, resulting in reduced production. Combined with foliar spray fertilizer, adding a broad-spectrum fungicide such as “Desenmanganese Zinc†or “methyl thiophanate†can greatly reduce the damage and delay the leaves. Carbendazim and bactericides based on carbendazim are not effective.
4. The main pests that attack the peanut leaves in the late stage of spraying insecticides are cotton leaf bollworms, bridge-forming insects and other leaf-feeding pests and leafhoppers (red spiders). The former is prone to damage under high temperature, rainy and high humidity conditions, while the latter is dry in the climate. Under the conditions, it should be checked to prevent the spraying of insecticides and acaricides in the young stage and when the spots occur. For underground pests such as cockroaches, golden worms, and ants, on the basis of previous prevention and control, if there are still larvae or murders in the soil layer, then apply a quick-killing worm powder or use methyl isothiophosphate. Pier.
5. There is more rainwater in the late stage of drainage and flood control. There is too much water in the ground and soil tillage layer. It is also one of the causes of early defoliation. In severe cases, it may cause rotten fruit loss. It is necessary to eliminate field water and plough layer diving in time. . In addition, when most of the leaves fall off, the top leaves and stems turn yellow, and most of the pods should be harvested when they are full. After receiving the late harvest, the fruit is reduced, the yield is reduced, and the quality is deteriorated.
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