Effect of temperature on the effectiveness of Bacillus thuringiensis var. israelensis against Culex pipiens molestus Forsk larvae
- 12 January 1982
- journal article
- Published by Wiley in Zeitschrift für Angewandte Entomologie
- Vol. 94 (1-5) , 408-412
- https://doi.org/10.1111/j.1439-0418.1982.tb02586.x
Abstract
Laboratory trials of Bacillus thuringiensis var israelensis against various larval instars of Culex pipiens molestus showed that susceptibility declined with the decreasing temperature. At all temperatures tested, the fourth instar larvae were more tolerant, and the third instar larvae more susceptible than the first and second instar larvae with intermediate response with no significant differences in their susceptiblility to the bacterium.Zusammenfassung: Über den Temperatureinfluß auf die Wirkung von Bacillus thuringiensis var. israelensis gegen Culex pipiens molestus Forsk‐LarvenLaboruntersuchungen mit B. thuringiensis var. israelensis gegen verschiedene Larvenstadien der Stechmücke Culex pipiens molestus ergaben, daß die Empfindlichkeit der Larven mit sinkender Temperatur abnahm. Bei allen getesteten Temperaturen zeigten die Viertlarven größere Toleranz und die Drittlarven größere Empfindlichkeit als die Erst‐ und Zweitlarven, welche intermediär ohne deutliche Unterschiede in ihrer Empfindlichkeit reagierten.Keywords
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