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Selection for increased resistance to a granulosis virus in the potato moth phthorimaea operculella lepidoptera gelechiidae


Bulletin of Entomological Research 73(1): 1-10
Selection for increased resistance to a granulosis virus in the potato moth phthorimaea operculella lepidoptera gelechiidae
Serial exposure of a susceptible laboratory strain of P. operculella (Zell.) to granulosis virus over 6 generations produced a 140-fold increase in LD50. This was probably due to a change in frequency of a resistance gene within the population. An attempt to select for even greater resistance in an already highly resistant laboratory strain resulted in only a small increase, due mainly to reduced variability in response of the population. The implications of resistance to viral insecticides developing under field conditions are discussed.


Accession: 006380563



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