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THE EFFECT OF TEMPERATURE ON THE TOXICITY OF SEVERAL PESTICIDES TO PHYTOSEIULUS PERSIMILIS (ACARINA: PHYTOSEIIDAE) AND TETRANYCHUS URTICAE (ACARINA: TETRANYCHIDAE)1

Published online by Cambridge University Press:  31 May 2012

P. R. Everson  and
N. V. Tonks
P. R. Everson
Affiliation:
Research Station, Agriculture Canada, Sidney, British Columbia V8L 1H3
N. V. Tonks
Affiliation:
Research Station, Agriculture Canada, Sidney, British Columbia V8L 1H3
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Abstract

The relationship between posttreatment temperatures of 15°, 20°, 25°, and 30°C and toxicity of six pesticides to adult female Phytoseiulus persimilis Athias-Henriot and Tetranychus urticae Koch were studied in the laboratory.

The toxicities of cyhexatin, dicofol, propargite, citrazon, chlorobenzilate, and per-methrin were positively correlated with temperature. Except for propargite and permefhrin, P. persimilis was less susceptible than T. urticae at 15° and 20°C, but equal in susceptibility at 25° and 30°C.

The results obtained may indicate a potential value of posttreatment temperature manipulation as a useful adjunct to integrated pest control programs in glasshouses.

Résumé

La relation entre des températures post-traitement de 15, 20, 25 et 30°C, et la toxicité de 6 pesticides pour les femelles adultes de Phytoseiulus persimilis Athias-Henriot et Tetranychus urticae Koch a été étudiée en laboratoire.

La toxicité du cyhexatin, dicofol, propargite, citrazo, chlorobenzilate et permethrin s’est avérée positivement corrélée à la température. Sauf pour le propargite et le permethrin, P. persimilis était moins susceptible que T. urticae à 15 et 20°C, bien qu’également susceptible à 25 et 30°C.

Les résultats obtenus suggèrent l’utilité potentielle de manipulations de la température post-traitement en tant que tactique d’appoint dans programmes de lutte intégrées en serres.

Type
Articles
Information
The Canadian Entomologist , Volume 113 , Issue 4 , April 1981 , pp. 333 - 336
Copyright
Copyright © Entomological Society of Canada 1981

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