| 释义 |
permethrin, n. Chem.|pɜːˈmɛθrɪn|
[f. per-1 + resmethrin n.]
A synthetic pyrethroid, C21H20Cl2O3 , employed as an insecticide in the form of a spray.
1975B.S.I. News Feb. 21/1 Permethrin. 1976Jrnl. Hort. Sci. LI. 111 Permethrin was outstanding both for persistence and high toxicity. 1978Daily Tel. 2 Oct. 3/1 Permethrin, which is used in fly sprays but is not considered harmful to people and pets, is to be added to water supplies in parts of Essex to kill worms. 1986Courier-Mail (Brisbane) 12 Nov. 1/4 Mr Webster said the permethrin, a chemical already widely used to kill cockroaches, had an immediate effect on household pests. |
