Health And Medical,Quality Red Ginseng Honey Tablets,Red Ginseng Extracts,Ginseng Essence Yanbian Dangun Pharmaceutical Co., Ltd. , https://www.tanjunpharmacy.com
1. Mosaic disease. At the beginning of the disease, there were water stains between the stems, veins, and veins of the young leaves. Subsequently, symptoms of yellow-green and intertwined mosaics of dark green and light green appeared on the young leaves, and watery spots appeared on the epidermis of susceptible fruits. Round spot. During the cold period, most of the leaves of the diseased plants fell off and the young leaves became deformed. In warm and dry years, the onset is severe. Prevention methods: 1 selection of disease-resistant varieties, strengthen the cultivation and management, enhance plant resistance to disease, disease resistance. 2 timely excavation of diseased plants to eliminate the source of the disease. 3 eliminate fieldworms and control the spread of the virus. 2. Diseases. The main damage to papaya fruit, the first incidence in the fruit pedicle. The disease is watery and light brown. When the weather is wet, the fruit quickly rots and a sparse layer of white mold grows on the diseased part. The disease is more severe under conditions of moderate temperature and high humidity. Control methods: 1 Once the disease is found, the following agents can be used to prevent and cure: 58% of thiram Mn-Zn wettable powder 600 times; 64% of anti-virus WP 500 times; 72.2% of water 400 to 600 times Liquid; 90% ethyl phosphorus aluminum wettable powder 500 times liquid: 1% Bordeaux mixture. Spray once every 10 to 15 days. The number of sprays depends on the condition and the weather. 2 Pay attention to clearing the garden and timely clear the fruit and diseased seedlings in the field. 3. Anthrax disease. It is a disease that is widespread and harmful. The disease can occur all year round, with a more severe onset in the fall. Papaya anthracnose mainly damages fruit, followed by damage to leaves and petioles. The fruit surface of the fruit was first spotted with spots that stained yellow or white or dark brown. It was water-stained and the lesions gradually expanded. When the diameter was about 5 to 6 mm, the lesions subsided, and concentric rings appeared on the surface. Numerous processes appear on the lines. On the leaf blade, lesions mostly occurred at the tip of the leaf and the leaf margin. The lesion was brown and irregular in shape. Spots grow black spots. On the petiole, lesions mostly occur on petioles that will fall off or have fallen off. The diseased part has no obvious boundaries. There are piles of black dots on top of it, and the diseased part does not subside. Prevention methods: 1 strengthen the cultivation and management, planting base fertilizer should be applied to make plants grow robust and reduce the incidence of diseases. 2 Pay attention to the clear garden, remove the diseased fruits and diseased leaves at any time, and collect and collect the diseased plant residues. 3 Use 0.5% Bordeaux mixture in young fruit, 40% extermination suspension 500 times, 70% thiophanate-methyl wettable powder 800 to 1000 times, 50% carbendazim WP or 75% chlorothalonil Wettable powder 600 to 800 times the liquid for prevention and treatment.