Insect pests of celery mainly include aphids and cabbage caterpillars, which can be used 800 times of 40% Dimethoate EC and 1500 times as fast as extinction and early control. The main diseases of celery are leaf spot, leaf spot and soft rot. In prevention and treatment, prevention is the main method, scientific irrigation, attention to moisture, medication before the onset or when there are sporadic lesions. Focus on the period of nursery, colonization to the film before the film, the film to the initial harvest period and spring weather in the middle and late stages of the four major stages of disease prevention work. The agents used are mainly 75% chlorothalonil 600 times, 50% mancozeb 600 times, and 77% can kill 400 times spray. It is generally sprayed every 7 days. It is better to use 3 to 4 agents alternately to avoid drug resistance. When the disease is serious, it is mixed with dust and aerosol. Generally, it can control the development of the disease 2 or 3 times. At the same time pay attention to ventilation, humidity, cooling, complete removal of diseased plants, sick leaves and other management. The comprehensive pest control measures are briefly described as follows:
aphid. The locust hi harms the backs and tender stems of various vegetables, and has strong fertility. Once it occurs, it is very difficult for the general pesticides to be completely eradicated. Therefore, it is necessary to clean up the fields, use insect nets, yellow traps and pesticides to prevent and control in several aspects. Yellow plate seizure: generally every 30 to 50 square meters, the price is cheap, the effect is good; chemical control: with 25% of the Aketai water scattered particles 5000 times liquid or 10% imidacloprid wettable powder 1500 times liquid 6~7 Spray once a day, 2 or 3 times in a row.
è¼è›„: Prevention and treatment with baits. The bait (grain, wheat bran, bean cake, cottonseed cake or corn crumb) 5 kg saute, and then use 90% trichlorfon crystal 30 times liquid 0.15 kilograms mix, mix tide for degree. Apply 1.5-2 kg per acre and spread it in the evening.
Root knot nematode disease. The root of the celery suffers, and root-like nodules are produced on the lateral roots and fibrous roots. The plants grow poorly and are short. Under the conditions of soil temperature of 20°C~30°C and soil moisture of 40%~70%, the nematode breeds quickly and is easy to accumulate in soil.
Central Venous Catheter(CVC)
Objective To study the application of spiral fixation for central venous catheter in clinical nursing.
Cvc Catheter,Medical Cvc Catheter,Single Lumen Central Venous Catheter,Triple Lumen Central Venous Catheter
Zhejiang Haisheng Medical Device Co., Ltd , https://www.hisernmedical.com