| Autor: |
V, Rupes, J, Ledvinka, J, Chmela, J, Pinterová |
| Rok vydání: |
1984 |
| Předmět: |
|
| Zdroj: |
Folia parasitologica. 31(2) |
| ISSN: |
0015-5683 |
| Popis: |
For testing the susceptibility of the head louse to insecticides impregnated bunches of polyamide fibres, whose diameter resembled that of human hair (0.1 mm) were used. In this manner a low mortality of control lice collected from infected persons was obtained (2.9% after 16 hours of exposure). Even after 25 years of DDT use no apparent resistance could be demonstrated in 25 tested louse populations and cross resistance to permethrin in 7 tested populations. The diagnostic concentration for resistance to pp'-DDT was established at 1%. Of the tested insecticides the highest toxicity was shown by malathion (LC50 = 0.000 018%), pirimiphos-methyl had on average a twice lower toxicity, trichlorphon 104 times lower, tetramethrin 1220 times lower, permethrin 2.5 times lower and pp'-DDT 630 times lower toxicity. |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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