Recently, some fruit farmers have reported that his apple mold disease has occurred more severely, and several kinds of pesticides have been used to prevent and treat it. However, the effect is not satisfactory. How can he control the apple mold disease?
The pathogenesis of apple mold disease is also known as apple heart rot, mildew rot, fruit rot, etc., which occur in all apple producing areas. It is a kind of fruit that the Marshal system and the series of varieties cultivated by the parent using the marshal are more prone to occur. Disease. The disease mainly damages the fruit. After the onset of the disease, the fruit has a mildew in the ventricle and the appearance is normal. The fruit rots or the fruit falls off early. The affected fruit generally starts from the ventricle and gradually spreads outwards, causing the fruit to become brown and full of pink. Moldy, yellow flesh, bitter after the rot. During fruit growth, some fruit surface yellowing, early coloring, fruit shape malformation or malformation, early fall. During the storage period, brown, light brown, or dark green and white water-soaked irregular wet rot plaques appear in the axillary part of the fruit, and the whole fruit rots when the plaques are connected.
The pathogen is caused by a variety of fungal infestations, such as Alternaria, Fusarium, Cephalosporium, etc., which are all fungi of the subphylum Aspergillus. The pathogens use mycelium to overwinter in diseased fruits or in necrotic tissues. They produce spores in spring and are transmitted through wind, rain, and rain. They enter the ventricle through the sacral tube during flowering, and the spores are lurking in the fruit. After the fruit develops, the mold proliferates, mainly at the flowering stage. Intrusion. The time for invading the heart of the fruit begins in late May, and the onset time begins in late June. The disease does not develop immediately after the fruit enters the fruit, but it only begins to spread when the fruit ages. Early flowering rainfall, rainfall, warm and humid, or dry and damp in the summer, low-lying terrain, canopy closure, extensive management, and inadequate organic fertilizer can easily cause the disease to occur more severe.
The first prevention and control method is to combine the winter shear to timely remove residual diseased leaves, diseased leaves, diseased fruits, weeds and other diseased plant residues in the orchard, scrape the diseased trunk of the trunk and destroy it together to reduce the bacteria source, and secondly, to increase the maturity of organic materials. Fertilizer or organic-inorganic biological compound fertilizer containing humic acid, according to the growth ratio of apple to nitrogen, phosphorus, and potassium (2:1:2), fertilize and timely apply nitrogen, phosphorus and potassium (10: 10:35), also contains 55% of multi-element, micro-elements such as calcium, boron, zinc, iron, manganese, sulfur, copper, magnesium, etc. Eurasian Multifunctional Water Soluble Fertilizer 750 times for 2 or 3 times to enhance the comprehensive resistance of the tree Disease ability; Third, spray 5 buds before the flower bud lime sulfur or 20 to 30 times the crystal lime sulfur; four is sprayed once a month before and after flowering agent, can use 21% peracetic acid water 375 Dilution, or 80% Dingjia (fully-complexed mancozeb) WP 900 times, 50% acetaminophen (Iprodione) Suspension 1000x, 43% tebuconazole Suspension 4500x .
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