Grape white rot control method

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I. Agricultural control

(1) Select disease-resistant varieties according to local conditions: such as black tiger, Knicks, Bai Yabaili, Keshaba, early island, security, buds and so on. In addition, red rose, yellow rose, longan and other susceptible grape pests. Jia Li Brew, Ma Forduo, Hesse Bailey not resistant to disease should be selected according to local conditions.

(2) Do a clean garden work and reduce the initial infection source:

1 During the growing season, the diseased fruit, diseased vines, and diseased leaves were removed, and the diseased tissue was cut off during winter cutting. Do a good job of draining water to reduce the humidity in the park, minimize unnecessary wounds, and reduce the chance of infection.

(2) Combine the grapevine winter scissors to cut off the diseased vines and the dry disease spikes hanging on the vines thoroughly, sweep away the litter on the ground, burn them centrally or bury them deeply, and reduce the source of infection in the second year.

3 After the mulching membrane is irrigated in spring, the mulching is applied on both sides of the grape plant to isolate pathogens in the soil and reduce the chance of infection. At the same time, it plays the role of heat preservation, water retention, fertilizer conservation, and herbicide elimination.

(3) Strengthen cultivation management:

1 Increase organic fertilizers, increase tree vigor, and increase tree disease resistance.

2 Improve the result area. The first wire is 50 centimeters away from the ground, leaving no ear below to reduce the chance of pathogenic infection.

3 Reasonably adjust the load, make full use of the plane, and make the distance between the new shoots not less than 5 cm, to prevent the excessive load from affecting the development of the tree and weakening the disease resistance.

4 During the growing season, picking up the heart in time, tying up the vines, cutting off the dense foliage or axillary shoots, and cultivating and weeding, improve the orientation and rack type, so as to facilitate ventilation and light transmission in fields. Pay attention to timely drainage after the rain, reduce the humidity in the field and reduce the incidence of grape diseases.

5 Low-lying areas in the garden, trying to improve soil and strengthen drainage.

6 After the flowering, the ear should be bagged to protect the fruit and prevent the invasion of the bacteria. The use of old newspapers has a low cost and the results are good.

(4) Improve ventilation and light transmission conditions: Summer pruning, keep the amount of leaves not too much, keep the plane ventilation and light transmission is better, and improve the resulting site. Strengthen the drainage work on rainy days to reduce the incidence of conditions.

(5) Bagging: In areas with severe disease, ear close to the ground can be bagged.

Second, chemical control

(1) Protective plan: The key period for using white chemicals to prevent and treat white rot after flowering and fruit setting and within one month before harvesting. In particular, extreme weather conditions such as hailstorms and storms must be treated in a timely manner. The commonly used agents are 50% nano-contaminated (thiophanate-methyl) Suspension, 45% Yunbaotai (Zoloxetine.Methionine) Suspension, 80% complexed Manganese WP, 65% Legendary (Benzophenone) Azoxystrobin) Suspension, 28% Juntel (Acetonizole), Suspension, 50% Directional (thiofuramide) Suspension, 20% White Fumei (Zeoconazole, Pentoxapol) Suspension, etc. .

(2) Therapeutic program: Once the occurrence of white rot occurs, the disease should be removed in time, and the 50% direction indicator (thiabartamide) suspending agent 2000-3000 times solution + 25% amido is used. Sucral sterilizing agent 2000 times or 20% Baifumei (Zeoconazole. Pioconazole) 1000-1500 times solution for emergency treatment, focusing on spray ear, continuous use 2-3 times. At the same time, use 50% of nano-cone (thiophanate-methyl) Suspension 600-800 times or 45% of Yun Bao Tai (Zepolone. Methionine) Suspension 1500 times +40% of Sego (Phenyl ether) Suspension 4000 Times full garden spray, including ground disinfection.

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