Grape white rot, also known as "water rot" or "scarred", often occurs in rainy years and is often associated with anthrax. Pay attention to effective prevention and control during the production process. Let's take a look at the occurrence rules of grape white rot and the specific prevention methods along with the Chinese pesticide net Xiaobian:
Mainly harmful to new shoots, cobs and fruits, leaves can also be affected, usually on the shoots first, the lesions occur in the wound, began to be water-immersed reddish brown, the edges are dark brown, and later developed into strip black Brown, the surface is dense with grayish white small spots. When the lesion is circumcised, the upper leaves are wilted and dead. In the late stage, the diseased cortex and the xylem are separated into filamentous longitudinal splits; the ear is damaged, and the irregular brown-shaped water-immersed lesions are formed on the fruit stems and cobs, and the lower part of the ear is dried up. The diseased fruit first turns into a light brown soft rot at the base, and gradually develops into a whole grain brown rot. The surface of the peel is densely grayish white and small grain points. Afterwards, the angular shrinkage of the fruit is easily detached; the leaf damage is mostly from the tip and leaf. The edge begins to form a nearly round, light brown large spot, with a non-obvious concentric pattern, and a grayish white small grain point at the end, and finally the blade is easily broken.
Occurrence characteristics: The sick body in the scattered ground and topsoil is the main source of infection at the beginning of the year, and the bacteria can survive in the soil for more than 3 years. At the base of the conidia on the stiff fruit, there are some dense mycelium, which have strong resistance to adverse environment and can survive for more than 10 years in the dried ear granule specimen. The conidia spread by rainwater splashing and invaded by plant wounds. The climatic conditions of high temperature and high humidity are the main factors for the occurrence and prevalence of the disease. The orchard with poor soil and poor drainage has a serious incidence; the orchard with poor ventilation and light transmission has a serious incidence; the incidence of large individual load of the plant is also heavy; the degree of disease is gradually increased when the fruit enters the coloring and maturity stages.
Comprehensive prevention and control methods for pesticides : Comprehensive control measures should be taken to prevent and control grape white rot, that is, to reduce the source of bacteria, control the source of infection; rationally apply fertilizer to enhance plant resistance; strengthen cultivation management and avoid disease conditions. Focus on effective prevention and treatment of pharmaceuticals.
1. Remove the source of disease: remove the diseased leaves and diseased fruits in time during the growing season, and cut off the diseased vines; collect the fallen leaves, ears, vines, grains and other diseased bodies immediately after harvest in the autumn, and clean them to remove the source of infection.
2. Rational fertilization: Fertilization is based on base application and organic fertilizer. Apply appropriate amount of nitrogen fertilizer before flowering to promote root and shoot growth. After the results, nitrogen, phosphorus and potassium were applied together, and the micro-fertilizer was appropriately supplemented to improve the disease resistance of the plant.
3. Strengthen cultivation management: rationally pruning, improve the result parts, reduce the chance of pathogen infection; timely tying vines, picking the heart, playing the secondary shoots and appropriate leaf thinning and thinning, improving ventilation and light transmission conditions. At the same time, do a good job of drainage and dehumidification in the rainy season, to avoid various favorable conditions of the disease.
4. Advocate the application of fruit bagging and disease prevention technology: the method should be to spray the micro-ecological preparation PB300 times solution or 25% succulent powder 600 times solution after the flowering for 15-20 days, after the drug solution is dried, timely Fruit bagging. Bags are taken 10 to 15 days before fruit harvesting to facilitate fruit coloration. Fruit bagging can effectively reduce the chance of infection of the bacteria, and can prevent the fruit from being polluted and improve the quality of the fruit.
5. Prompt pesticide control: After the grape results, the lower ear should be checked frequently, and the diseased ear should be removed in time to avoid pathogen infection. The affected plot can use 70% methyl thiophanate 1000 times solution, or 75% chlorothalonil WP 500-800 times solution, or 12.5% ​​diniconazole 2000 times solution, alternately spray every 7~10 days. Spray once, even spray 3~5 times. It is better to use foliar micro-fertilizer such as potassium dihydrogen phosphate when mixing. The pesticide network reminds everyone that in the critical illness park, the sterilizing drug should be applied to the ground during the initial period. Use 1 part of Fumei double, 1 part of sulfur powder, 2 parts of calcium carbonate, and then apply 1.5~2 kilograms per acre, every half month. Sprinkle 1 time, a total of 3 to 4 times.
We are a specialized manufacturer integrating the development, production and distribution of various Safety Shoes and labor protection shoes. What`s more,we applied for and got the CE,ISO and LA certification to keep to international safety principle. The main functions include: Anti-slip, Anti-smash, Anti-puncture, Antistatic, Insulation, Oil resistant, Acid and Alkali resistant and High temperature resistant.
Safety Shoes
Safety Shoe, Safety Shoes For Men, Work Safety Shoes, Comfortable Safety Shoes, Industrial Safety Shoes, Construction Safety Shoes
QINGDAO SANJET NEW POWER MACHINERY CO., LTD. , http://www.sanjet.net