Canadian Forest Service Publications
A nuclear polyhedrosis of Erannis tiliaria (Harris) (Lepidoptera : Geometridae). 1962. Smirnoff, W.A. J. Insect Pathol. 4(4): 393-400.
Issued by: Laurentian Forestry Centre
Catalog ID: 15975
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In the summer of 1961, at the time of a recurrent outbreak of the linden looper, Erannis tiliaria (Harris), in sugar-maple stands in southern Quebec, there occurred a virus epizootic in this insect. The disease is a nuclear polyhedrosis, the virus belonging to the genus Borrelinavirus; the polyhedra multiply in the nuclei of blood and other cells of larvae. The polyhedra multiply in the nuclei of blood and other cells of larvae. The polyhedra are roughly octahedral, and dissolve in weak alkali solutions liberating single rod-shaped virus particles. Under laboratory conditions, concentrations of 8 x 103 polyhedra/1 ml of water are highly pathogenic to larvae. The incubation period of the disease is approximately 5 days and mortality is complete about 14 days after infection.