- Aug 09, 2017 -
The vapor of the fumigant is generally passed through the epidermis or valve of the pest into the respiratory system, thereby penetrating into the blood to cause pest poisoning to die. Its insecticidal effect is generally believed to be the chemical action of the enzyme. Such as methyl bromide can be combined with sulfur-hydrogen, so that a variety of enzymes in the pests produce reverse and irreversible inhibition. Phosphine inhibits the central nervous system of animals, stimulating the lungs to cause edema, leading to heart swelling syndrome. The mechanism of phosphine on insects is mainly to inhibit the activity of cytochrome C oxidase and catalase in insects, so that the respiratory chain of insects block suffocation and lead to the accumulation of cytotoxins such as peroxides. Trichloroethane, dibromoethane, carbon tetrachloride and other fumigant are mainly anesthetic, carbon dioxide is mainly from the role of asphyxia.