Peanuts appear from 50% of the plants to full fruit to most of the pods ripe for harvest. The characteristics of fertility in this period are: gradual decline in vegetative growth, cessation, and the pods are gradually full and full, which is an important period for the formation of yield. At this stage, we mainly do the following work:
1. Prevent disease and keep leaves, and extend the functional period of the leaves. The main disease in the late growth stage of peanut is leaf spot disease, and its peak incidence is 20-30 days before peanut harvest, and high temperature and high humidity or continuous rainy rain occurs. In the early stage of the disease, you can choose 50% carbendazim WP 800 times or 70% thiophanate-methyl WP 100g or 45% dexamethasone WP 100g, 50kg spray control, 10- Spray again once in 15 days, even spray 2-3 times.
2, foliar topdressing to protect the top leaves. When the peanut enters the full fruit period, its root absorption capacity is obviously weakened, which seriously affects the supply of nutrients, but the leaves still have strong absorption function. The method of foliar spray fertilizer can make up for the shortage of fertilizer in the later stage, thus increasing the yield of peanuts and Quality. From the late stage of pod formation, every 7 to 10 days, spray 1% to 2% urea and 2% to 3% calcium superphosphate solution 2 to 3 times per leaf, 50 kg per mu. Extend the functional period of the parietal lobe and increase the pod fullness.
3. Timely drought resistance and drainage. In the late growth stage of peanuts, the suitable soil moisture is 50%-60% of the maximum water holding capacity in the field. In this period, if the drought is dry, the roots are easy to decline, causing defoliation, stem and branch decline, reducing the rate of fruit filling, resulting in reduced yield. Watering should be done in time to preserve the roots and keep the leaves, increase the rate of fruit filling, and spray water when watering, avoid flooding. If there is too much rain and poor drainage, it will easily cause the roots to rot and die. In severe cases, the pods will rot or germinate. Therefore, when there is too much rain in the late growth period, the ditches should be dredged in time to eliminate stagnant water and internal hesitation to ensure high quality and high yield.
4. Control underground pests such as cockroaches and golden worms. For the serious occurrence of the field, in addition to the seed dressing at the time of sowing, it is also necessary to use the 5% phoxim granules of 3 kg/mu for the fine dry soil 1.5~ before the irrigation or the rain. 2.5 kg mixed and applied. Or use 48% of the espresso emulsifiable concentrate 200 ml / mu and add appropriate amount of water to dilute and mix with 1 kg of fine sand. Or cultivating the ridge after applying the poisonous soil.
5. Harvest at the right time. When most of the leaves fall off, the top leaves turn yellow, the stems become yellow and soft, and most of the pods are full, so we must grasp the harvest. After receiving the late harvest, there are many fruits, and it is difficult to pick up, the output is reduced, and the quality is deteriorated.
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