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Action ofBacillus thuringiensis preparation against larch bud moth,Zeiraphera diniana (Gn.), enhanced byβ-exotoxin and DDT

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Summary

Addition of either DDT or the supernatant of a centrifuged liquid culture ofBacillus thuringiensis, serotype H1, containing β-exotoxin, enhanced the action of the bacterial preparation Thuricide 90T against larvae of the larch pestZeiraphera diniana, increasing mortality from 53% to more than 80%. Since DDT alone produced 57% mortality, its combined action corresponds to independent action. The preparation of β-exotoxin, on the other hand, had only little effect alone but synergized the action of the bacterial preparation considerably.

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Authors and Affiliations

  1. Department of Entomology, Swiss Federal Institute of Technology, CH-8006, Zürich, Switzerland

    G. Benz

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  1. G. Benz
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Additional information

Contribution No. 83 of the research team for the investigation of the population dynamics of the larch bud moth. The research was aided by a grant of the Swiss National Funds for the Advancement of Scientific Research.

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Benz, G. Action ofBacillus thuringiensis preparation against larch bud moth,Zeiraphera diniana (Gn.), enhanced byβ-exotoxin and DDT. Experientia 31, 1288–1290 (1975). https://doi.org/10.1007/BF01945785

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