Use high toxic pesticides for low spray
Since high-toxicity pesticides are used for ultra-low-volume spraying, in order to maintain efficacy, the concentration of sprayed liquids is higher than that of conventional drugs. Low-volume sprays are limited to spraying less toxic pesticides, such as malathion, safrole, Dimethoate and pyrethroid pesticides, etc., and require the use of personnel must always stand in the limelight of the drug-free walk. 1605. Highly toxic pesticides such as methamidophos are forbidden to be used for ultra-low-level sprays to avoid causing productive poisoning.
Spraying with granule pesticides
The specifications and composition of granule pesticides are mostly based on the biological characteristics of its control objects and protected objects and the environmental conditions of the drug application sites, and thus have strong specificity, special effects, and targeted delivery. Currently used primarily for ground and underground medications. Control weeds or pests, no water spray. In addition, the granules of the original drug are mostly highly toxic pesticides, after the reduction of toxicity after granulation, can increase the safety of use, flooding spray will make its toxicity recovery, easy to use pesticide poisoning.
Dusting with a wettable powder pesticide
Wettable powders are powders made by adding a certain amount of wetting agents and fillers to the original drug and mechanically grinding or diverting the powder. Compared with general powders, the active ingredient content is high and the fluidity is poor. Therefore, it can only be used as a suspension after dissolution, and it cannot be directly sprayed as a powder.
High temperature, high wind, cloudy and rainy days
The suitable temperature for general pesticide spraying is 20°C~30°C, the temperature is too high, the volatile decomposition of the chemicals will affect the control effect, and it is easy to cause pesticide poisoning. The application of pesticides in windy weather, the pharmacy is easy to drift with the wind, it is difficult to reach the target part, not only can not receive the effect of application, but also seriously pollute the environment. Therefore, it is stipulated that the wind speed during spraying should not exceed 1 m/s. In addition, most pharmaceutical agents are not resistant to rain and rain, and are sprayed in rainy weather. They are easily scattered, making it difficult to achieve the desired results and polluting the environment.
Diluting emulsified and suspended pesticides with well water
Well water contains a lot of calcium and magnesium substances. Dilution with well water will destroy the emulsifying and suspending properties of the pharmaceuticals, so that the efficacy will be reduced or even completely lost. This will not only affect the control effect, but also cause phytotoxicity.
Randomly expand the scope of medication
Mainly refers to agricultural herbicides, such as: grass Gan Ning mainly used in orchards, woodlands and other gardens, nurseries and herbicides, herbicide because of different drug properties, can not be used for field crops; Grams can be used for corn, mulberry weeding, but Protective cover should be used in combination to prevent accidental spraying and cause phytotoxicity.
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