Effect of temperature on toxicity of three pyrethroids to horn flies.
Med Vet Entomol
; 3(4): 435-9, 1989 Oct.
Article
in En
| MEDLINE
| ID: mdl-2519694
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, flucythrinate and permethrin) over the temperature range 20-35 degrees 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 degrees C. Within this range, mortality was greatest at 25 degrees 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.
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Collection:
01-internacional
Database:
MEDLINE
Main subject:
Phenylacetates
/
Pyrethrins
/
Muscidae
/
Insecticides
Type of study:
Prognostic_studies
Limits:
Animals
Language:
En
Journal:
Med Vet Entomol
Journal subject:
BIOLOGIA
/
MEDICINA VETERINARIA
Year:
1989
Document type:
Article
Country of publication:
United kingdom