| Autor: |
HINKLE, NANCY C., SHEPPARD, D. CRAIG, BONDARI, KAINE, BUTLER, JERRY F. |
| Zdroj: |
Medical & Veterinary Entomology; Oct1989, Vol. 3 Issue 4, p435-439, 5p |
| Abstrakt: |
ABSTRACT. Predictive models describing best-fit regression equations for per cent mortality of horn flies as a function of temperature were determined for each of three pyrethroid insecticides (fenvalerate, flueythrinate and permethrin) over the temperature range 20-35°C. Susceptible horn flies, Haematobia irritans (L.), were exposed to c. an LC70 dose of each pyrethroid using a residue-on-glass method. This technique used confined exposure in chambers with temperatures of 20,25,30 and 35°C. Within this range, mortality was greatest at 25°C with all three insecticides. Estimated temperature-mortality equations for each pyrethroid revealed different responses of horn flies to each of these insecticides. Horn flies exposed to flucythrinate demonstrated a linear mortality response that varied inversely with temperature. The response to permethrin was described by a quadratic equation, while the response to fenvalerate was best fitted by a cubic equation. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
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