Canadian Forest Service Publications

La présence d'une polyédrose nucléaire chez Lymantria dispar (L.) en Algérie. 1991. Khous, M.G.; Valéro, J.R.; Jobin, L.J. Nouvelles en lutte biologique/Biocontrol News 4 : 54-57.

Year: 1991

Issued by: Laurentian Forestry Centre

Catalog ID: 14130

Language: French

Availability: PDF (request by e-mail)

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Analysis of Lymantria dispar (L.) specimens collected in Holm oak (Quercus ilex L.) in the Djudjura Region of Algeria indicated the presence of a naturally occurring nuclear polyhedrosis virus which had reached the epizootic level. Larval instars one to three and four to six were affected in proportions of 8.0 and 98.2 percent, respectively. Of the 311 pupae examined, all contained polyhedral inclusion bodies and one out of four pupae eventually died of the disease. Beauvaria bassiana was the other pathogen observed; it occurred only in the pupal stage and only in 3.4 percent of the specimens examined. The nuclear polyhedrosis virus caused the decline of gypsy moth populations in the Djudjura Region of Algeria.