How to choose "Pair" pesticides The so-called "counter pesticides" refers to the selected pesticide variety or dosage form is the most economical and effective agent for eliminating or controlling one or several pests. The range and objects of different types of pesticide varieties or dosage forms for controlling harmful substances are also different. Therefore, the quality of a pesticide variety is not based on the price of the expensive, but on the virulence of the drug against the control object, the use of benefits, including crop growth, product quality, farmland environment and human society, there are no toxic side effects, etc. To measure, this is the theoretical basis for rational drug use. For example, the sulfur preparation in the fungicide has high efficiency against powdery mildew, but is basically ineffective against downy mildew; the agent with strong stomach toxicity in the insecticide has a good effect on the chewing mouthparts pests of the biting plant, and the pest of the sucking mouth device. If mites, mites, etc. are ineffective, when there are multiple control agents for the same pest, the drug source, control effect, prevention cost (including cost, equipment, application method, technical conditions, etc.) should be considered, such as the control of rice blast. Tricyclazole, Fuji No. 1 (Indigo); citrus red spiders have good control effects such as quetiapine and Niblon; leaf bacillus is the first choice for controlling bacterial blight of rice; and scales for controlling crops such as vegetables, fruit trees and flowers Hymenoptera, Hymenoptera, semi-warp and other pests, the use of all killing has excellent control effect, and low cost; killing snails, rice snails and dryland snails and other molluscs, should use Milda, snail kill (kill Spiroamine ethanolamine salt); control of rapeseed grass weeds with grass cover grass, and control of broadleaf weeds should use broad grass grams. At the same time as selecting pesticide varieties according to the control target, attention should also be paid to the choice of dosage form. By selecting a suitable dosage form, the control effect can be improved, and the pollution or other harmful effects on the farmland environment can be alleviated or avoided.
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