What are the main symptoms of apple rotten fruit disease?
The main pests and diseases of apple rotten fruit disease include apple ring rot, anthracnose, rot, black rot, brown rot, etc., all of which can cause good fruit to become defective fruit, affecting yield and reducing orchard benefits.
The onset of apple rotten fruit disease?
From now on, every fruit grower must earnestly and comprehensively do a good job in ensuring fruit and promoting income and income. Apple rotten fruit disease usually infects the fruit in the young fruit period (May to July), and then appears to be latent, and forms a disease in the near mature stage (August to September), and then the disease occurs in a few days. Especially in the late rainy season, the temperature and humidity conditions are prone to outbreaks.
The control methods of apple rotten fruit disease are as follows:
1. Selecting the pesticides After August-September, it is the maturity stage of the mid-late ripe apples, and it is also the epidemic stage of the spread of the bacteria. At this time, it should be sprayed according to the weather conditions. Generally, when there is no rain or less rain, it can be carried out as usual; if the rainfall is too high, the temperature and humidity are high, the interval is appropriately shortened, the application frequency is increased, and the systemic sterilization and protective fungicide are used alternately. The fungicide has 68.75% easy to protect 1500 times, 10% world high 2500-3000 times, bacteria kill special 1200-1500 times, 70% nail table 800 times, 80% big life m-45800 times, 40% Fuxing 800-1000 times, There is also a cheap and good Bordeaux mixture. When formulating pesticides, adding a quantitative synergist, penetrant or spreading agent, not only the drug effect is increased, the residual effect period is long, and the rainwater is washed away, and the control effect is quite good.
2, strengthen management From the beginning of August, combined with spraying and spraying 3-4 times of candy, Gaomei Shi, leaf-preserving agent, Fuwan potassium and 0.5% potassium dihydrogen phosphate, interval 10-15 days. Look at the sky to use the water; stop the ring cutting and stripping, timely and appropriate autumn trimming, the diseased branches, long branches, and the branches and densely squeezed branches, thin parasitic branches to facilitate ventilation and light; timely inspection The bag is removed and some of the insect fruit, diseased fruit, fruit-seeking fruit, malformed fruit and sun-dried fruit are removed to reduce nutrient consumption and enhance the tree potential to improve the tree's resistance to stress.
3, spraying the pesticide evenly spraying the process should be uniform, thoughtful, comprehensive, meticulous, and sprayed to the branches and fruits, highlight the key points, leave no trouble, do your best to treat the later apple rotten fruit disease early Governance, control, and control to a minimum.
4, after harvesting fruit picking fruit before harvesting, with 2-6% calcium chloride, fruit disease or bacterial poisoning fruit for 0.5-1 minutes, can significantly reduce a series of fruit disease during storage Incidence.
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