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Studies on the cross-transmission of polyhedral viruses: experiments with a new virus from Pyrameis cardui, the Painted Lady butterfly

  • Kenneth M. Smith (a1) and N. Xeros (a1)

Extract

Up to the present time the polyhedral viruses of insects have been considered to be extremely specific in their infectivity, and cases of cross-infection, even between closely related species, were regarded as rare occurrences. Recently, however, we have recorded results which suggest that there is no such specificity of infection (Smith & Xeros, 1952). In the following paper we describe the results obtained in an extensive series of cross-inoculations among a heterogeneous collection of lepidopterous larvae, selected entirely at random. The results obtained appear at first sight to be compatible with one clear-cut explanation of straightforward cross-infections with differential multiplication of two different viruses in different hosts. Other complications, however, cannot be excluded and one or two possible situations are discussed later in the paper.

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Balch, R. E. & Bird, F. T. (1944). A disease of the European spruce sawfly, Gilpiniia hercyniae (Htg.) and its place in natural control. Sci. Agric. 25, 6580.
Bergold, G. (1947). Die Isolierung des Polyeder-Virus und die Natur der Polyeder. Z. Naturforsch. 26, 122–43.
Smith, , Kenneth, M. & Wyckoff, R. W. G. (1950). Structure within polyhedra associated with insect virus diseases. Nature, Lond., 166, 861.
Smith, , Kenneth, M. & Wyckoff, R. W. G. (1951). Electron microscopy of insect viruses. Research, Lond., 4, 148–55.
Smith, , Kenneth, M., Wyckoff, R. W. G. & Xeros, N. (1953). Polyhedral virus diseases affecting the larvae of the privet hawk moth (Sphinx ligustri). Parasitology, 42, 287289.
Smith, , Kenneth, M. & Xeros, N. (1952). Transmission of polyhedral viruses between different insect species. Nature, Lond., 170, 492.
Xeros, N. (1952). Cytoplasmic polyhedral virus diseases. Nature, Lond., 170, 1073.
Yamafuji, Kazuo (1952). Mechanism of artificial virus formation in silkworm tissues. Enzymologia, 15, 223.

Studies on the cross-transmission of polyhedral viruses: experiments with a new virus from Pyrameis cardui, the Painted Lady butterfly

  • Kenneth M. Smith (a1) and N. Xeros (a1)

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