The latest 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 continues to rise, the market prospect is good all the way, and planting develops rapidly, but the phenomenon of serious fruit drop and insufficient kernel often occurs in production, which hinders the development of walnut and discourages the enthusiasm of farmers. So how to deal with the phenomenon that walnuts are falling and the nuts are not full? Let's get to know it.

1. The cause of walnut fruit drop

Walnut falls off into falling flowers without enlargement. When the fruit develops and expands, it is called falling fruit. Generally, the falling flower is more serious than the falling fruit. Walnut fruit drop is divided into physiological fruit drop and disease and insect pest fruit drop, which is mainly caused by poor insemination, dysplasia and undernutrition, mainly within 30-40 days after flowering. Fruit drop is caused by diseases and insect pests, and the biggest difference between it and physiological fruit drop is that fruit drop has disease spots or insect eyes.

2. The reason why the nuts are not full

The lack of fullness of walnut kernels is also a common new type, mainly due to insufficient nutrition accumulation of seeds, improper fertilization or long-term rainy days and insect pests are the causes of insufficient nutrition accumulation. it is possible to cause the nuts to be not full.

3. Measures to solve fruit drop

Physiological fruit drop can improve the quality of female flowers, improve the nutrition level of trees, and take measures such as artificial pollination, artificial male thinning and foliar fertilizer spraying can reduce fruit drop artificial pollination can obviously improve the quality of pollination. The pollen of male flowers is collected in sunny days and put in a glass bottle and refrigerated for use. When the female flowers bloom, they can be pollinated. The frozen pollen and water were mixed with 10% sucrose and 0.02% ammonia borate to form a suspension and sprayed with a sprayer. When the flower bud is enlarged, the male flower bud can be removed manually, and it can also be carried out in combination with pruning. Spraying 0.02% boric acid + 0.3% urea + 0.3% potassium dihydrogen phosphate at the flowering stage of the female flower can increase the fruit setting rate and promote the development of young fruit. For fruit drop caused by diseases and insect pests, the prevention and control of diseases and insect pests should be strengthened, which can greatly reduce fruit drop caused by diseases and insect pests.

4. Measures to solve the problem that nuts are not full.

In order to solve the problem of unfullness of 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 plumpness of nuts. At the same time, it is necessary to apply fertilizer reasonably and maintain the nutrients needed by the plant, and fertilize many times a year, especially in the flowering and fruit stage. from the point of view of fruit development, in order to improve the plumpness of nuts, it is necessary to grasp the accumulation of nutrients from July to August, followed by from June to July. During the period of more Rain Water from April to August, the humidity was high, the light was small, and the high temperature and high humidity environment could easily lead to serious diseases and insect pests, exuberant vegetative growth and insufficient nutrient accumulation, which seriously affected the fruit quality. It is necessary to increase the application of farm manure and phosphorus and potassium fertilizer, properly control the application of nitrogen fertilizer, and re-apply fruit harvesting fertilizer in October.

The above is the walnut kernel is not full and fruit drop solution introduction, hope to help you, want to know more related knowledge, please follow us.