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An effective strain ofBacillus thuringiensis against fourth-instar caterpillars ofBoarmia selenaria

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A strain ofBacillus thuringiensis Berliner effective against fourth-instarBoarmk selenaria Schiffermüller (Lepidoptera: Geometridae) was found. Strain HD-251 of the varietykurstaki H-serotype 3a, 3b was more effective than the standard HD-1-S-1980 in laboratory bioassays. The potency of HD-251 is two to four times higher than that of the standard, and varies from 19,821 to 68,645 IU/mg. Two other strains of the varietyaizawai H-serotype 7,viz., HD-249 and T63L4, were inferior to HD-251, with potencies of 6,982 and 13,714 IU/mg, respectively, against first-instar larvae.

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Correspondence to M. Wysoki or P. De Haan.

Additional information

Publication of the Agricultural Research Organization. No. 2383-E, 1988 series.

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Wysoki, M., De Haan, P. An effective strain ofBacillus thuringiensis against fourth-instar caterpillars ofBoarmia selenaria . Phytoparasitica 16, 175–177 (1988). https://doi.org/10.1007/BF02980471

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Key Words

  • Bacillus thuringiensis vars.kurstaki andaizawai
  • Boarmia selenaria
  • bioassay