What is the reason why apples rot in the young fruit period?

Prevention and control of apple rot from the source

Apple rot is a disease caused by fungal infection, including apple anthracnose, ring rot, epidemic rot, black rot and brown rot. In case of high temperature and rainy weather, especially in the young fruit stage, rotten spores are constantly replicating and infected. If pesticides are not sprayed in time, it will cause serious diseases, cause fruit rot, turn good fruits into residual fruits, reduce the quality of apples, and affect the yield and orchard benefits. The occurrence of apple rot is directly related to climatic conditions and tree potential. Only by doing these two aspects well can we fundamentally solve the problem.

First, early prevention in rainy and humid seasons.

After August-September, it is not only the mature stage of mid-late ripening apples, but also the stage of rapid spread and epidemic of pathogens, so it should be sprayed as appropriate according to the weather changes. At this time, spraying "new high-fat film" forms a protective film on the fruit surface, which plays a role in preventing and stopping rotten fruit germs and inhibiting the infection and harm of pests and diseases. Especially in rainy season, spraying once every 10 day can reduce the adverse effects of rainy days and heavy rainfall on fruit trees.

Second, strengthen the tree potential.

Strong trees can ensure good color, big fruit and sweet taste, and bring economic benefits to fruit farmers. Spraying "Guagua Zhuangdiling" before flowering, young fruit stage and fruit expansion stage will promote the thickening of flower stalks and fruit stalks, increase the transport of nutrients in the flower and fruit stage, improve the fruit expansion speed, increase the color and protect the flowers and fruits from falling off.

After the apples are harvested, the orchard should be fertilized and pruned. The big wound caused by pruning should be coated and sealed with "calluses antiseptic film" in time to prevent fruit rot bacteria from entering the wound. After smearing, the pests and diseases inside the tree will suffocate and die. Before closing the garden in winter, spray "general tree protection" on the trunk and branches of fruit trees to make the trees quickly form a protective film to protect flower buds from freezing injury; In addition, it can prevent overwintering bacteria and eggs from falling on trees. Through the above measures, we can create a good environment for fruit trees to survive the winter safely, conserve energy and ensure a bumper harvest in the coming year. (China Plant Protection Network Haiyan)