What are the control methods for grape black pox?
1. Eliminate the source of the pathogen. After the grapes drop their leaves in autumn, remove the fallen leaves and diseased clusters and bury them deep in a centralized pit. The old bark scraped off must be burned immediately. When the grape buds begin to swell in spring, spray with 3-5 degrees Baumé lime sulfur plus 0.3% sodium pentachlorophenate. 2. Strengthen cultivation management. In combination with summer pruning, carefully prune out diseased branches, diseased leaves and diseased fruit to reduce...
1. Eliminate the source of the pathogen. After the grapes drop their leaves in autumn, remove the fallen leaves and diseased clusters and bury them deep in a centralized pit. The old bark scraped off must be burned immediately. When the grape buds begin to swell in spring, spray with 3-5 degrees Baumé lime sulfur plus 0.3% sodium pentachlorophenate.
2. Strengthen cultivation management. In combination with summer pruning, carefully prune out diseased branches, diseased leaves and diseased fruit to reduce reinfection; reasonably increase the application of phosphorus and potassium fertilizers and control nitrogen fertilizer to strengthen the vines and prevent excessive vegetative growth; reasonably space the retained canes and improve ventilation and light penetration conditions - these are important measures for controlling this disease.
3. Spray early and use pesticides wisely. Spray once before grape flowering or after petal fall and once when the fruit reaches the size of a soybean grain. You can use Pubo, Fuxing, chlorothalonil, carbendazim, etc.