There are many types of cucumber diseases and insect pests, and the use of chemical pesticides is heavy. In the production of cucumber, the main diseases are damping-off disease, blight, downy mildew, powdery mildew, blight, early blight, gray mold, leaf mold, angular spot disease and anthracnose. The main pests are aphids and melons. Cockroaches, Huang Shougua, Liriomyza sativae, Whiteflies in the greenhouse, Red spiders, etc. At present, there are many problems in prevention and control, mainly manifested in the inability to treat the disease symptomatically, overemphasizing the control effect, and arbitrarily increasing the amount of pesticides used, and re-treat light defense. Chemical pesticides are used in small quantities and have quick effects. Other control measures cannot be replaced. According to the current level of scientific and technological development in China, at least in the coming decades, chemical pesticides will remain the main measures for prevention and control of pests and diseases in facilities. Chemical pesticides should be scientifically used in the future to organically harmonize chemical prevention and treatment with disease-resistant varieties, increase the mineral nutrient levels of cucumber plants, ecological regulation, cucumber bagging and other pest control measures, so as to effectively control pests and diseases, and to solve problems. Pollution of cucumbers and ecological environment by chemical pesticides and the goal of producing cucumbers for green foods.
It is a common medical consumable, which has been sterilized to establish a channel between the vein and the liquid for intravenous infusion. Generally, it is composed of eight parts connected with intravenous needle or injection needle, needle guard, infusion hose, medical fluid filter, flow rate regulator, drip pot, cork puncture, and air filter. Some infusion sets also have injection parts. , Dosing mouth, etc.
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