Occurrence and Control of Apple Mold Heart Disease
Heart disease rot of apple mold disease. The main damage Marshal is apple varieties. In recent years, with the expansion of Apple's cultivated area, the damage has been increasing year by year, and the serious disease rate is as high as 40% or more. About one month after harvesting, the disease often causes moldy and decayed apple ventricles.
First, the incidence of symptoms of apple mold disease mainly damage the fruit. Cut open the fruit to observe, the beginning of the disease has brown discontinuous punctate or strip small spots, after the fusion into brown patches. There are red, green, black, and white molds in the ventricles. The germ often breaks through the ventricle and rots into the flesh. The development of symptoms can be divided into four types: ventricular small-spot type, ventricular large-spot type, ventricular rotten type, pulp rot type.
Second, control methods
1. Reasonable fertilization: Increase farm manure, apply nitrogen, phosphorus, and potash fertilizers rationally to enhance disease resistance of fruit trees. At the same time, spraying 0.4% calcium nitrate or calcium chloride 1-2 times during the young fruit stage and fruit enlargement period will increase the calcium content of the fruit, which can reduce the respiratory intensity of the fruit and improve the anti-aging ability, so as to reduce the damage of the bacteria.
2. Chemical control: From the bud stage of fruit trees to 10 days after flowering, continuous spraying of fungicide three times can achieve better control effect. The better control agent has 10% Bao Kang 1000-1500 times liquid.
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