Introduction to the prevention and control of grape black pox
1. Eliminate the source of bacteria. After falling leaves in autumn, the fallen leaves and diseased ears are removed and buried deeply, and the old bark scraped off should be burned immediately. When the grape bud scales sprout in spring, spray Baume 3-5 degree stone sulfur mixture + 0.3% pentachlorophenol sodium. 2. Strengthen the cultivation and management. Combined with summer pruning, careful pruning of diseased branches, diseased leaves and diseased fruits to reduce re-infection; reasonable application of phosphorus and potassium fertilizer and control of nitrogen fertilizer to enhance tree potential and prevent overgrowth; reasonable retention of branches and improvement of ventilation and light transmission conditions are important measures for the prevention and treatment of the disease. 3. Spray medicine early and skillfully, spray one medicine before or after flowering of grapes and when the fruit is big enough for soybeans, such as Pubo, Fuxing, Chlorothalonil, carbendazim and so on.
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Introduction to the occurrence characteristics of grape black pox
The pathogen overwintered mainly as sclerotia on the disease spots of new shoots and tendrils. In the next spring, when the temperature was higher than 2 ℃ and the high temperature lasted for more than 24 hours, a large number of conidia were produced from the sclerotia, which were transmitted to the green young parts of grapes by Rain Water, and the conidia produced germ tubes in water and were quickly fixed to the substrate, which led to primary infection after germination. It's time to...
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Introduction to the symptoms of grape brown spot
Symptom identification: it is a fungal disease, which is mainly harmful to leaves, which is divided into large spot and small spot, which is caused by two kinds of diseases. At the initial stage of the occurrence of large brown spot, round or polygonal disease spot is formed around the leaf veins, the disease spot is brown to dark brown, the edge is reddish brown, and there is a yellowish-green halo around the spot, gradually expanding to form brown.
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