Prof. Zhang Zongqin reminded farmers that the virulent period of grape blackpox is generally 6 to 12 days. At the temperature of 24 to 30°C, the incubation period is the shortest and exceeds 30°C. The incidence of the disease is inhibited. Grape shoots and young leaves are most susceptible to the disease, and the incubation period is also shorter. He said that in order to reduce or reduce the incidence and incidence of blackpox, a series of measures such as reducing humidity and moisture and reducing pathogens are needed, including a comprehensive drainage system, clear gardening measures, and field sanitation measures. And sick organizations), field management (reasonable leaf screen, good air and light transmission, summer control of secondary shoots) and so on. Dissemination of seedlings to disinfect the blackpox disease is mainly through seedlings or cuttings with pathogens. Therefore, when constructing a garden, fruit growers should select disease-free grape seedlings or disinfect the seedlings. Commonly used seedlings disinfectants include 10% to 15% ammonium sulfate solution, 3% to 5% copper sulfate solution, 10% ferrous sulfate + 1% crude sulfuric acid solution, and 3 to 5 Baume degree lime sulfur compounds. The method is to soak seedlings or cuttings in any one of the aforementioned liquids for 3 to 5 minutes and then remove them to plant or raise seedlings. Paying attention to the initial infestation of blackhead disease in fields is mainly caused by the overwintering bacteria source on the sick and residual body. Therefore, Zhang Zongqin reminded the farmers to be careful when clearing the garden so as to reduce the number of bacteria that were initially infected. During winter pruning, the branch shoots and remaining diseased fruits were cut off, the disease and old bark were scraped, and the dead branches, fallen leaves, rotten fruit, etc. in the orchard were completely removed and burned. The spatula was used to spray the soil around the tree and trunk. The commonly used eradicants include: 3 to 5 Baume degrees lime sulfur, 45% crystal lime sulfur 30 times, and 10% ferrous sulfate+1% crude sulfuric acid. Spraying time is better when the scales of grape buds are enlarged and no green tissue has emerged. Late spraying is prone to phytotoxicity and premature effects are poor. Strengthen the management of orchards, drain them in time after the rain, and prune them reasonably to make the vineyards airy and transparent. Chemical control A full spray of shoots and the entire greenhouse and ground was made with a mixture of sodium pentachlorophenol sulfate and lime sulfur before grape sprouting. At the beginning of the disease, spraying 1:800:240-240 Bordeaux mixture or 52% Kebubao WP 800 times, or using mancozeb, carbendazim, moldy grams, phytophthora, and Dasheng, etc. It is critical to control the spraying after flowering before flowering. Copper preparations are the most basic and critical agents for controlling black spot disease. Sea Shrimp Series,Pink Shrimp,Headless Pink Shrimp,Headless Ramboo Prawn GOLD STAR FISHERY ZHOUSHAN CO.,LTD. , https://www.goldstar-aquatic.com
Physical and chemical measures to prevent and cure grape black spot disease
Recently, some readers called the newspaper to inquire about the prevention and control technology of grape blackpox disease. Zhang Zongqin, an associate professor at the College of Forestry of Northwest Agriculture and Forestry University, was here to answer scientific questions for fruit farmers who encountered the same problem.