Chick virus disease and the prevention and treatment of tea yellow pods http:// cultivation techniques January 10, 2008
First, the difference between the two is to harm the young parts of the plant, so that the leaves become smaller deformed, brown leaves, plant dwarf, etc., serious when fallen leaves, fallen flowers, fruit drop and so on. In the early stage of virus disease, the leaf veins of the heart regress from green, gradually turning into leaf shrinkage. Afterwards, the diseased leaves thicken and the leaf margin curls to the front to form a buckle. However, the hazard of the tea plant is chlorosis of the whole leaf, and the leaf edge curls toward the back. Under the bucket. When the virus disease harmed the fruit, dark green and light green spots and verrucous ridges appeared. When the tea radix threatened the fruit, the surface of the pedicel and stalk was grey to gray brown and lost its luster. It was corked and hardened. Virus disease damages the main veins of leaves with brown or black necrosis and gradually spreads to the lateral branches, main stems and growing points, and the hazard of the ocheriferous leaves is that any part on the back of the leaves may be grayish brown or brownish and have oily luster.
Second, the prevention and treatment of viral diseases: 1 selection of disease-resistant varieties, such as Zhongjiao No. 2, Jinjiao No. 3, No. 1 No. 2 Shenjiao, No. 1 No. 1 sweet pepper. 2 seed disinfection. Soaking with 10% sodium phosphate solution for 20 minutes, washing with water and soaking and germination. 3 cultivation management. The use of plastic film covering cultivation, so that early colonization, early results. 4 chemical control. Spray 20% of virus A wettable powder 500 times, 50% of bacteria clear 200 times, bacteria, grams of poison 200 grams of liquid and so on. Spray once every 10 days at the seedling stage or after planting, and control 3-4 times in a row. Tea-yellow glutinous rice: (1) Clear the weeds in the field and the litter in the fields, level the land, and destroy the overwintering sites to eliminate overwhelming insect sources. (2) It was found that the occurrence of this disease should be immediately controlled by the chemical. It can be used 15% fluorenone EC 300 times, 34% locust ricin EC 2000-2500 times, 48% LST 1000 times, 1.8% Ji Insect moth, 1.8% avermectin (Zeadin, Xinke, etc.) 3000x, 15% Qinling EC 1500x, 73% Kraft 2000x, 15% Broth Neoprene 2000x Liquid, 35% killing special emulsion oil 1000 times liquid and other agents for prevention and treatment. When spraying, focus on the young part of the upper part of the plant. For the production of pollution-free vegetables, diclofen must not be used when controlling aphids.
First, the difference between the two is to harm the young parts of the plant, so that the leaves become smaller deformed, brown leaves, plant dwarf, etc., serious when fallen leaves, fallen flowers, fruit drop and so on. In the early stage of virus disease, the leaf veins of the heart regress from green, gradually turning into leaf shrinkage. Afterwards, the diseased leaves thicken and the leaf margin curls to the front to form a buckle. However, the hazard of the tea plant is chlorosis of the whole leaf, and the leaf edge curls toward the back. Under the bucket. When the virus disease harmed the fruit, dark green and light green spots and verrucous ridges appeared. When the tea radix threatened the fruit, the surface of the pedicel and stalk was grey to gray brown and lost its luster. It was corked and hardened. Virus disease damages the main veins of leaves with brown or black necrosis and gradually spreads to the lateral branches, main stems and growing points, and the hazard of the ocheriferous leaves is that any part on the back of the leaves may be grayish brown or brownish and have oily luster.
Second, the prevention and treatment of viral diseases: 1 selection of disease-resistant varieties, such as Zhongjiao No. 2, Jinjiao No. 3, No. 1 No. 2 Shenjiao, No. 1 No. 1 sweet pepper. 2 seed disinfection. Soaking with 10% sodium phosphate solution for 20 minutes, washing with water and soaking and germination. 3 cultivation management. The use of plastic film covering cultivation, so that early colonization, early results. 4 chemical control. Spray 20% of virus A wettable powder 500 times, 50% of bacteria clear 200 times, bacteria, grams of poison 200 grams of liquid and so on. Spray once every 10 days at the seedling stage or after planting, and control 3-4 times in a row. Tea-yellow glutinous rice: (1) Clear the weeds in the field and the litter in the fields, level the land, and destroy the overwintering sites to eliminate overwhelming insect sources. (2) It was found that the occurrence of this disease should be immediately controlled by the chemical. It can be used 15% fluorenone EC 300 times, 34% locust ricin EC 2000-2500 times, 48% LST 1000 times, 1.8% Ji Insect moth, 1.8% avermectin (Zeadin, Xinke, etc.) 3000x, 15% Qinling EC 1500x, 73% Kraft 2000x, 15% Broth Neoprene 2000x Liquid, 35% killing special emulsion oil 1000 times liquid and other agents for prevention and treatment. When spraying, focus on the young part of the upper part of the plant. For the production of pollution-free vegetables, diclofen must not be used when controlling aphids.