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Isolation of Bacillus thuringiensis subsp. israelensis from diseased field-collected larvae of the saturniid moth, Hylesia Metabus, in French Guiana

Vassal J.M., De Barjac H., Frutos R., Federici B.A.. 1993. FEMS Microbiology Letters, 107 : p. 199-204.

An isolate of Bacillus thuringiensis subsp. israelensis (BTI) was obtained from field-collected larvae of the saturniid moth, Hylesia metabus. This isolate was shown to belong to serotype H 14, and to produce a spherical parasporal body identical to that of the type strain of BTI. With an LC50 of 0.764 micron cm-2, this isolate was more toxic to H. metabus than the HD-1 strain of B. thuringiensis subsp. kurstaki (HD-1). These results demonstrate that BTI can be active against lepidopterous insects, a wider spectrum of activity than previously realized.

Mots-clés : bacillus thuringiensis; hylesia; lutte anti-insecte; hylesia metabus

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