Integrated prevention and treatment of bitter gourd virus disease

Integrated prevention and treatment of bitter gourd virus disease

"The new leaves become narrow, long, shrinking, hardened and twisted. The diseased plants are obviously dwarfed and it is difficult to sit on melons. Even sitting on melons is deformed, hardened, and mottled on the surface." Recently, a farmer held a diseased bitter gourd vine. , Anxiously looking for plant protection station consultation and the author to reflect on what the disease is, and seek solutions.

The author believes that in the case of the farmers who did not use hormones and flowers in the earlier period, and did not use excessive pesticides, it should be the disease of bitter gourd virus. From the point of view of severity, it is the type of yellowing and shrinking in viral diseases.

The bitter gourd virus disease is the main disease of bitter gourd. It is widely distributed and occurs widely. Protected fields and open fields all occur. It is heavier to plant in summer and autumn. General disease strains 5-10%, to some extent affect the yield and quality. When the disease is heavy, the incidence rate can reach more than 15%, which significantly affects bitter gourd production.

When it occurs, the whole plant is generally victimized, mainly invading the plant leaves and growing points, and the young shoots at the top have obvious symptoms. In addition to yellowish wrinkled virus disease, there is also a mosaic virus disease, manifested as the first disease of the upper leaves, yellow and green spots on the leaves, leaf uneven, new leaves deformity, hardening, cranial top internodes Shortened, sterile flowers, difficult to set fruit, or poor fruit development, the formation of deformed fruit.

The disease mainly occurs in high temperature, strong sunlight, and drought conditions. Excessive management, excessive weeds, neighboring crops of melons, and serious locust outbreaks. In addition, the lack of water in the field, lack of fertilizer, plant growth weakness disease is also more serious.

For the prevention and treatment of bitter gourd virus disease, there are currently no good agents capable of eradicating the disease, which can only prevent further expansion of the virus. One is to cure insects and prevent viruses from being transmitted by ticks and greenhouse whitefly. It can use 25% Aktai water dispersible granules 6000-8000 times liquid, 70% Irvine water dispersible granules 10000-15000 times, 5% imidac cream EC 2500-3000 times, focus on the spray back and growth point. The second is spraying virus passivation agent, such as spraying with 20% of virus A wettable powder 400-600 times, or spraying of 1.5% of Lingzhiling emulsion 1000 times, once every 7-10 days, spraying 2-3 times in total. Or spray with 0.1% potassium permanganate solution, antitoxic agent No. 1 300 times, etc., can enhance the plant's resistance to the virus and disease resistance. In the early stage of disease, spraying 1-2 times with 200-300 times of 5% mycorrhizal bactericidal agent has a certain effect. In addition, when carrying out field operations such as manual flower picking, fruit picking, pruning, and tied vines, it is necessary to pay attention to the diseased plant and the healthy plant separately to prevent artificial virus transmission and reduce cross infection.

In areas where balsam pears are planted all year round and where viral diseases are severe, prevention must be done in advance from the following aspects in future planting. Namely: select disease-resistant varieties, leave seeds from disease-free plants, disinfect seeds before sowing, use medicinal soil as cover soil after sowing, spray insecticides before transplanting, and water frequently when raising temperature. Humidity in the field, reduction of locust infestation and transmission of poisons, spraying of growth-promoting bacteria, multi-effects, or growth promoters such as phytoalexin, or spraying of a mixture of potassium dihydrogen phosphate, black soap or laundry soap 1:1:250 times, 5-7 days, even spray 4-5 times.

Wheeled Commode

Commode With Wheels,Rolling Shower Commode Chair,Pvc Shower Chair With Wheels,Bariatric Rolling Shower Chair

Active Life Healthcare Co.,Ltd , https://www.alh-med.com