Apple mold heart disease, also known as heart rot, mold rot, red rot and fruit rot, is caused by mixed infection of many fungi and occurs in apples. It mainly harms fruits, especially marshal varieties. Fruit damage began in the ventricle and gradually spread outward to mildew. The diseased fruit heart turns brown and is covered with gray-green mold, sometimes pink mold;
During storage, when the core mildew is serious, wet rotten patches with waterlogging, brown and irregular shape can be seen in the trunk, and the patches can be connected with each other, and eventually the whole fruit will rot and the pulp will be bitter.
Extended data:
Prevention and cure of apple mould heart disease;
1. Initial symptoms: when the diseased fruit is cut open, brown discontinuous spots or bands appear in the fruit room, and then most of the spots merge into brown patches, and orange, dark green, black gray and white molds appear in the fruit room. The development of symptoms can be roughly divided into four types: one is ventricular small spot type, and the diameter of the lesion is less than 2 mm;
Second, the ventricular large plaque type, the lesion diameter is greater than 2 mm, and the lesion tissue is moist; The third is ventricular failure, and the diseased tissue is wet; Fourth, the flesh is rotten, and the outline of the diseased meat is irregular, sometimes shrinking and spongy. In the growing period, moldy fruits are difficult to identify from the appearance, and diseased fruits are easy to fall off and continue to rot after landing.
2, the onset of apple mold heart disease is a disease caused by a variety of fungi. Pathogens overwinter on diseased fruits or necrotic tissues, and begin to infect in the next spring. Bacteria enter the ventricle through the calyx tube of flowers and fruits, and spread in the ventricle, and some bacteria lurk in the ventricle until the storage period.
The infection rate of pathogens is positively correlated with the opening rate of calyx tube. All fruits with open calyx mouth and long calyx tube are easy to get sick, such as Red Star, Marshal and Beidou. Orchard is low-lying, with closed crown and serious diseases of weak trees.
3. Control methods Strengthen orchard management.
Baidu Encyclopedia-Apple Mold Heart Disease