How is apple fruit rust formed?

Apple fruit rust is a physiological disease caused by bad external conditions, which is mainly manifested in the peel of apple. In recent years, apple fruit rust has become an important problem in apple production, which has seriously affected the appearance quality of apples. So, how is apple fruit rust formed?

Formation process of apple fruit rust;

When the fruit is very small, the cuticle is very thin and the waxy layer has not yet formed, so the protection ability is poor. When the fruit grows rapidly, the epidermal cells expand rapidly, which often causes the cuticle to crack. Or the cuticle is destroyed by external adverse factors, so that epidermal cells lose their protective barrier and are damaged, resulting in cell embolism death and fruit rust.

Stimulated by external adverse factors, stomatal guard cells will also die and lose the function of regulating stomata, so a pile of cork cells will be produced below stomata, which will bulge upward and often burst stomata, forming large and rough dark lenticels. Corked lenticels often occur with fruit rust, which leads to further roughness of fruit surface.

Preventive measures of apple fruit rust;

At present, there is no good treatment method for apple fruit rust, which can only prevent fruit rust, but not fruit rust.

1. Cultivation management. Reasonable pruning or thinning can solve the problem of orchard closure and enhance ventilation and light transmission. Prevent low temperature and freezing injury in flowering period, prevent dry weather in young fruit period, and replenish water in trees in time. Try to choose high-quality fruit bags. After the fruit powder solution is fully dried, bag it, and the mouth of the bag must be tightly tied. Reasonable load. Stay away from the polluted area and park. Avoid damaging the surface of the fruit during manual operation.

2. Use drugs safely. Especially after flowering and before bagging in young fruit stage, suspending agent and aqueous solution should be selected as the main dosage forms. At the same time, avoid using products such as copper preparation, organophosphorus, emulsifiable concentrate and powder with incomplete dissolution. In the process of pesticide application, it is required that the distance between the nozzle and the fruit surface is appropriate, the atomization effect is good, and the spray pressure is moderate to reduce the stimulation of the chemical solution to the fruit surface of young fruits.

3. Bag in advance. In areas with serious fruit rust, bags can be bagged in advance to avoid the stimulation of rain and liquid medicine on young fruits.

4. Balanced fertilization. Avoid partial application of nitrogen fertilizer; Pay attention to supplement medium and trace elements to enhance the stress resistance and disease resistance of fruits. Today, Bian Xiao recommended a product of Henan Feng Jiayi Agricultural Science and Technology Co., Ltd.-Canon Fengguo, which can quickly supplement various nutrients needed for crop growth, increase the toughness of peel, prevent fruit embroidery, increase the vitamin C content of fruit and greatly improve the commodity grade of fruit.

Promoting flowers, expanding fruits and dyeing beautiful fruits-Jianeng Guo Feng-Jiayifeng Agriculture

Specification: 5kg×4 barrels/box

◆ Protect bacteria, promote flowers and protect fruits.

◆ Flora provides fruit expansion genes.

◆ Coloring sweetens, and green is non-irritating.

Product features:

This product is based on a variety of beneficial bacteria, and contains seaweed polysaccharide, mannitol, polyaspartic acid, cellulose, cell growth hormone and trace elements. After use, it is conducted by the vascular bundle of crops, precipitated from the plant, and then fully meets the health needs of crops through the action of photosynthetic plant enzymes, regulates the anthocyanin content, has a high-energy promotion effect on crop flowering, improves the fruit setting rate, does not drop fruit, has a good promotion effect on fruit expansion, and has high pulp density. In the fruit coloring period, it can induce the fruit to quickly pass through the coloring factors of photosynthetic fruit itself, which is moist and beautiful. Through the reasonable self-distribution and nutrition mechanism of beneficial bacteria, it can increase the sugar content of fruit, reduce the fruit acid, increase the toughness of peel, prevent the occurrence of fruit embroidery, increase the vitamin C content of fruit, greatly improve the aroma, taste and flavor of fruit, and promote the self-preservation ability of fruit, which provides a good foundation for prolonging the storage and freshness of fruit.

How to use:

Irrigation and drip irrigation: 2-3 kg per mu in seedling stage and about 5 kg per mu in middle stage. It is suggested that it can be applied once every 7- 10 day. When using this product, we should grasp the fertilization time. Crops with shallow roots are generally controlled within 30 minutes, and crops with deep roots are generally controlled within 2 hours.