How to understand the fumigation effect of pesticides?

Fumigation is an insecticidal method to make up for traditional pco, that is, the toxic gas volatilized by the poison reaches a certain concentration in the air, enters the internal tissues of pests through their respiratory system, causes poisoning and kills them after a certain period of time. Such as libraries, cereals, silk, antiques, etc. If there are bugs, it will be difficult to deal with them, especially granaries and malt. In this case, fumigation is a good solution, with strong fumigation penetration, wide insecticidal activity and low retention, but it is technically difficult. At present, sulfuryl fluoride is a common fumigant in the market. A gaseous or evaporable chemical agent that can kill pests or germs is a kind of agent that uses the toxic gas produced in the process of volatilization to poison harmful organisms. Service object of fumigation and pest control: 1) Pest control in hotels, restaurants, warehouses (granaries) and warehouses; 2) Fumigating and disinfecting the materials of containers and cargo ships; 3) Insect prevention services such as grain processing, food processing workshops and processing machinery; 4) Pest control in cultural relics archives, libraries and databases; 5) Pest control of ancient wood furniture, ancient paintings and other collectibles, pianos and other musical instruments; 6) Termite control in cultural relics, buildings and reservoirs; 7) Agricultural greenhouses and plastic films should be fumigated with soil to kill underground pests. ? On grid pest control, pest control. 4) Pest control in cultural relics archives, libraries and databases; 5) Pest control of ancient wood furniture, ancient paintings and other collectibles, pianos and other musical instruments; 6) Termite control in cultural relics, buildings and reservoirs; 7) Agricultural greenhouses and plastic films should be fumigated with soil to kill underground pests. Fumigation dosage form: 1) methyl bromide was originally a good fumigant, but it has been listed as an obsolete product internationally because of its damage to the atmospheric ozone layer. At present, the two most commonly used fumigants are aluminum phosphide and sulfuryl fluoride. 2) Aluminum phosphide: It is a broad-spectrum fumigation insecticide, which is mainly used for fumigation and disinfestation in granaries, and can also be used in various warehouses.

Kill insects and mice. When aluminum phosphide meets water or moisture, it will immediately produce highly toxic phosphine gas, which will enter the insect body through the respiratory system of insects (or mice and other animals) and inhibit the normal growth of insects until they die.