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- W2071824206 abstract "Abstract Investigations have been made to throw light on the possible inter‐relation between the host insect Spodoptera littoralis , the pathogen Bacillus thuringiensis and parasites or predators. The parasite Microplitis demolitor showed to be affected from certain aspects when its host larvae were fed on a diet containing B. thuringiensis , these aspects include reduction in percentage of emergence and reproductive potential. Also, the predator Chrysopa carnea is affected in terms of larval duration and rate of food consumption, when the larvae were fed on a treated host, such as Spodoptera littoralis or Aphis durantae. Similar effects were obtained with Coccinella undecimpunctata. These results indicate that B. thuringiensis may cause few biological effects to the parasites and predators exposed to it. The results cannot be conclusive under the laboratory conditions where these experiments have been carried out, but the investigations have to be extended to the field. Zusammenfassung Zur Wirkung von Bacillus thuringiensis Berl. auf die Parasiten und Prädatoren der Baumwolleule Spodoptera littoralis (Boisd.) Microplitis demolitor , eine Schlupfwespe, die die Raupen von S. littoralis parasitiert, zeigte sich in verschiedener Weise beeinflußt, wenn die Wirtsraupen von einer Nahrung fraßen, welche B. thuringiensis enthielt. Vor allem wurden dadurch die Schlüpfquote und das Vermehrungspotential verringert. Auch die räuberische Florfliege, Chrysopa carnea wurde in der Dauer ihrer Larvalentwicklung und der Nahrungsaufnahme negativ beeinflußt, wenn ihre Larven Beutetiere (wie S. littoralis oder Aphis durantae ) fraßen, die mit Bacillus thuringiensis infiziert waren. Ähnliche Effekte zeigten sich beim Marienkäfer Coccinella undecimpunctata. Diese Ergebnisse zeigen, daß B. thuringiensis einige über Wirts‐ und Beutetiere verlaufende Wirkungen auf Parasiten und Prädatoren ausübt. Es handelt sich dabei um Laborergebnisse, die nunmehr im Freiland nachzuprüfen wären." @default.
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- W2071824206 date "1982-01-12" @default.
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- W2071824206 title "Effect of Bacillus thuringiensis Berl. on parasites and predators of the cotton leafworm Spodoptera littoralis (Boisd.)" @default.
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- W2071824206 doi "https://doi.org/10.1111/j.1439-0418.1982.tb02596.x" @default.
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