The pathogen of grape black spot pox is grape cysts, belongs to the genus Ascomycota, and is a major disease on grapes. The main damage to the grape's green young parts if the real, fruit stems, leaves, petioles, shoots and tendrils and so on. What are the preventive measures for grape black spot disease?
1, choose resistant varieties. Such as Kyoho, Kangbier, Rose, Jifeng 14, white bananas and other varieties of black pox disease has a strong ability to resist disease, fruit farmers can choose according to the situation around.
2, seedling disinfection. Grape black pox disease spreads mainly through seedlings. Therefore, strict inspection of seedlings and cuttings must be conducted, and seedlings suspected of being infected with bacteria must be disinfected.
3, do a good job orchard health, pruning, remove diseased leaves, diseased fruit and disease vines.
4, a reasonable fertilizer management. Before the vineyard is planted and after it is harvested every year, it is necessary to apply sufficient organic fertilizer to maintain a strong tree vigor; additional fertilizer containing nitrogen, phosphorus, potassium and trace elements should be used for topdressing to avoid separate and excessive application of nitrogen fertilizer.
5, spray 3-5Be lime sulfur agent before the spring plant germination. During the grape growing period, from the beginning of the leaf development until one-third of the fruit matures, especially during the two critical periods of pre- and post-flowering, a protective agent is sprayed every 15 to 20 days, alternating with 20% thiamin copper ( Rhodendron) 700 times, 50% carbendazim 500 times, 80% mancozeb 600 times, 75% chlorothalonil 750 times.
6, the onset of the use of therapeutic agents, such as 10% of the world's high 1500 times, Fuxing 7500 times, myclobutanil 1500 times, diniconazole, etc., alternate medication 2-3 times. The use of aquacultured amines during the harvest period was controlled and the food was eaten 48 hours later.
The above is the prevention and treatment of grape black bean disease, and it is hoped to help the majority of farmers.
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