Measures to solve the problem of unfullness and fruit drop of walnut

Walnut is one of our common dried fruits. In recent years, its price has been rising continuously, the market prospect has been optimistic all the way, and the planting development is rapid. However, serious fruit drop and incomplete kernel often occur in production, which hinders the development of walnut and dispels the enthusiasm of farmers. So how to deal with the phenomenon of walnut fruit drop and kernel not full? Let's get to know each other.

1. Reasons for walnut fruit drop

Walnut in the female flower without expansion and fall into flower, fruit development and expansion when falling off called fruit, general flower drop than fruit drop to be serious. Walnut fruit drop is divided into physiological fruit drop and fruit drop caused by diseases and insect pests. Physiological fruit drop is mainly caused by poor insemination, poor development and insufficient nutrition, mainly concentrated in 30-40 days after flowering. Fruit drop is caused by pests and diseases. The biggest difference between fruit drop and physiological fruit drop is that fruit drop has disease spots or insect eyes.

2. Reasons why nuts are not full

Walnut kernel is not full is also a common existence of a new type, the main reason is due to insufficient accumulation of nutrients in the kernel, improper fertilization or long-term rainy days and pest damage are the reasons for insufficient accumulation of nutrients, may cause its kernel is not full.

3. Measures to solve fruit drop

Physiological fruit drop can improve the quality of female flowers, improve the nutritional level of trees, and take measures such as artificial pollination, artificial male thinning, foliar spraying fertilizer can reduce the artificial pollination can obviously improve the quality of pollination, collect the pollen of male flowers in sunny days, put them into glass bottles and put them in refrigerators for later use, pollinate when female flowers bloom, and mix the refrigerated pollen with water, 10% sucrose and 0.02% ammonium borate in a ratio of 1:500 to form suspension, spray with sprayer. When the flower bud is expanded, the male flower bud can be broken off manually, or it can be combined with pruning. Spraying 0.02% boric acid +0.3% urea +0.3% potassium dihydrogen phosphate at the full flowering stage of female flower can increase the fruit setting rate and promote the development of young fruit. For the fruit drop caused by diseases and insect pests, the prevention and control of diseases and insect pests should be strengthened, which can greatly reduce the fruit drop caused by diseases and insect pests.

4, nuts are not full solution measures

In order to solve the problem of not full nuts, we must first do a good job in the prevention and control of diseases and insect pests, ensure the health of trees, improve photosynthetic efficiency, and greatly improve the fullness of nuts. At the same time, reasonable fertilization should be applied to maintain the nutrients needed by the plants. Fertilization should be applied many times a year, especially in the flowering and fruiting period. From the perspective of fruit development, in order to improve the fullness of nuts, it is necessary to grasp the accumulation of nutrients in July and August, followed by June and July. During April to August, when there is more rain, humidity is high, light is low, high temperature and high humidity environment is easy to cause serious diseases and insect pests, vigorous nutrition growth and insufficient nutrient accumulation, which seriously affects the quality of fruit. To increase the application of farm manure and phosphorus and potassium fertilizer, appropriate control of nitrogen fertilizer application, heavy application of October fruit fertilizer.

The above is the introduction of the solution measures for walnut kernel not full and fruit drop. I hope it can help you. If you want to know more about it, please pay attention to us.