1. According to the different characteristics of the pest growth period, timely use of drugs. With the increase of the age of the insects, the resistance of vegetable pests has also increased. The best period of application of pesticides and pesticides should be before the 3rd instar larvae; for drillworms, such as cotton bollworm, carnivorous insect, sphagnum, scallions and other pests, the appropriate period of application should be at the peak of hatching; adult stage It can be induced by sexual attractants, and the effect is obvious.
2. Choose the best medication period according to different climates. The control effect of many pesticides is closely related to the temperature, such as trichlorfon, dimethoate, phoxim, etc., and its control effect increases with temperature in a certain temperature range. Medication. Pyrethroid insecticides such as kung fu, bifenthrin, bifenthrin, cyfluthrin, etc., have better control at lower temperatures, so such pesticides should be used in the morning and evening. Insecticides, fungicides, herbicides and growth regulators with systemic transport function, when the field is weak, the temperature is low, and the relative humidity of the air begins to rise, the agent volatilizes less, and most of it can be absorbed by plants. Good control, so these medicines should be used in the afternoon or evening. Microbial pesticides are sensitive to light and humidity, and should be used when foggy or dew is more.
3. Select the best period of drug use according to the characteristics of different infestation hazards of vegetable diseases. Drug control should be carried out before the most serious disease hazard and heavy loss of production. When applying a protective fungicide, the drug should be applied before the infection of the crop.
4. Choose the best time according to the effect of cultivation management after administration. In the winter greenhouse production, in order to maintain the temperature of the greenhouse and reduce the humidity of the air, it should be used in the morning or at noon on the sunny day to facilitate the release of air and moisture. Open field cultivation, avoid using the medicine before rainfall, and prevent rainwater from diluting the liquid.
Correct application refers to the method of application. At present, pesticides produced in China or imported from abroad are mainly based on emulsifiable concentrates; fungicides and herbicides are mainly wettable powders. Therefore, the current application of pesticides in China is mainly spray, followed by seed dressing, dusting, dusting, and poisoning. Different application methods can be selected according to different situations. (1) Prevention and control of underground pests. Prevention and control of underground pests can be carried out by seed dressing, poison bait, poisonous soil, root irrigation and soil treatment. (2) Prevent seed carriers. The seeds can be treated with chemicals, soaked in warm soup, and the like. (3) Use in the production of protected areas. Currently commonly used methods of application are spraying and igniting aerosols.
Lifting Shower Hinges are a kind of hinges which use lifting sleeve to lift. The up and down Lift Shower Door Hinges are divided into left and right opening two kinds. They use different lifting sleeves to distinguish left and right opening directions. Lift Off Hinges can also be lifted up by 4-4.5mm. Lift Up Hinge is also suitable for uneven ground. When the ground is slightly inclined to the right, it is necessary to choose the left-side lifting hinges. When the Lifting glass hinge are raised in parallel, they will not touch the ground or glass.
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