Chinese Cabbage Pest Prevention and Control Technology Measures

In the growth process of Chinese cabbage, there are many types of diseases and pests, and the prevention and control of pests and diseases directly affects the high yield of Chinese cabbage. In order to effectively prevent and treat cabbage pests and diseases, the prevention and control strategy should implement the plant protection policy of “prevention-oriented, comprehensive prevention and control” and agriculture. Based on prevention and control, biological control and auxiliary chemical control are advocated, and the comprehensive prevention and control measures are as follows.

First, pest control before planting

1, clean pastoral. Reduce the number of pests and diseases, concentrate on the prevention and control of buds and cabbage caterpillars on vegetables and thoroughly remove weeds from vegetable fields. The plants that have been pulled have to be treated centrally to reduce the source of bacteria and insects.

2, reasonable arrangements for mouthwash. The first crop of Chinese cabbage should be solanaceous, melon, and onion, and should not be used in conjunction with cruciferous vegetables.

3. Level land, apply basic fertilizer, and increase compound fertilizer. In order to ensure the nutrition during the growth period of Chinese cabbage, enhance disease resistance, promote the live broadcasting of sorghum to facilitate drainage, prevent floods and reduce humidity, and reduce the occurrence of downy mildew and soft rot.

4, soil disinfection. In heavy land masses where the soil pests are heavy, 0.5 to 1 kilograms of 25% carbaryl per 667 square meters or 2.5 to 4 kilograms of trichlorfon powder, or phoxim toxin soil, per 667 square meters (1:100) Withdraw 10-l5 kg per 667 square meters and immediately turn it into the soil.

5, selection of disease-resistant varieties. According to local conditions, select disease-resistant varieties or hybrids such as: New No. 1, Jingbai No. 4, Beijing 106, Chaoqing, etc., according to the various cultivation conditions pay attention to more varieties, avoid species singulation.

6, seed disinfection. 25% metalaxyl seed dressing, 40-60 g per 5 kg species, or seed dressing 0.4% thiram or chlorothalonil can prevent downy mildew, use anti-toxic agent No. 1: 1:10 seed dressing, can Prevention and treatment of virus disease at seedling stage.

7, suitable sowing. Many years of practice have proved that early broadcast disease is heavy and late broadcast disease is light, but the heart is not true and the output is low. The sowing date is appropriate on August 5-8.

8, cover the silver film. In order to prevent aphids from spreading virus disease after emergence of seedlings, in some places, a silver thin film of 0.02 mm can be laid at noon after sowing, which not only avoids disease, but also lowers the temperature and promotes root development.

Second, pest control after sowing

1, seedling watering in time to cool. Chinese cabbage leaves are susceptible to viral diseases in the presence of 6 leaves. In case of high temperature and drought, it is beneficial to the occurrence of viral diseases. After planting cabbage, the method of “three-water seedlings, five-water seedlings, and small waters” was used to reduce ground temperature, promote root development, and timely control of field locusts, which can effectively prevent viral diseases. (Adequate time seedlings and Dingmiao, take the method of secondary seedlings once Dingmiao, pay attention to eliminate weak seedlings, diseased seedlings, post-miao seedlings per 667 square meters of ammonium sulfate l0 kg, to promote seedlings Miao Zhuang, enhance disease resistance, combined with the second The second time seedlings are planted in shallow cultivator once, but they need to avoid rabbit roots to prevent the occurrence of soft rot.(2)Spray spraying shibao.After planting, every 667 square meters, spraying with spray water on a branch, interval l0 days 1 time, three times in a row, to promote seedling growth, enhance disease resistance, can be combined with the prevention and treatment of pests and pesticides at the same time, seedlings should also be promptly controlled pests yellow striped trichomes, cabbage caterpillars, especially nocturnal insect pests, to reduce soft rot The occurrence of disease and black rot.

2. The rosette period is for the normal growth of the cabbage during the rosette period. It needs reasonable watering. Generally, the seedlings should not be too long.

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