At room temperature, it can volatilize toxic gas or generate toxic gas through certain chemical actions, enter the body through the respiratory system such as the valve of the pest, and poison the pest to death. ) o Generally, the original drug can be directly applied without further processing and preparation, such as methyl bromide, chloropicrin, aluminum phosphide, dichlorvos, etc. pesticide fumigant is mainly used to prevent and control storage and greenhouse pests.
It is made of pesticides, fillers, additives, etc., which are evenly stirred, and pressed into tablets or blocks with a certain shape. It is characterized by easy to use, easy to measure, and so on. For example, aluminum phosphide tablets. Tablets of pesticides can avoid dust flying in the reproduction and use of powder products such as wettable powders, soluble powders, dry suspensions, etc., reduce the harm of drugs to the human body and facilitate accurate metering of drugs; on the other hand, it can reduce some fumigant drugs. and
The contact area of the air is used to control the probability of the volatiles reacting with oxygen, water, or carbon dioxide in the air, thereby controlling the release rate of the drug and prolonging the validity period.