Register      Login
Crop and Pasture Science Crop and Pasture Science Society
Plant sciences, sustainable farming systems and food quality

The effectiveness of a granulosis virus applied to field populations of Pieris rapae (Lepidoptera)

F Wilson

Australian Journal of Agricultural Research 11(4) 485 - 497
Published: 1960


A granulosis virus (apparently Bergoldia virulenta Tanada) which causes a highly virulent disease of the larvae of Pieris rapae, is recorded from Australia. External symptoms of the disease and the period of survival after infection vary according to larval age at infection. In four field experiments, aqueous suspensions of disease particles applied as sprays to natural infestations of P. rapae induced epizootics which persisted until the experiments ceased 3–7 weeks later. Larval populations on the disease plots were markedly lower than on the controls although the disease usually spread to the controls within a few weeks; the proportion of larvae reaching the later and more damaging instars was much lower on the disease plots, few larvae reaching the fifth instar and very few reaching the pupal stage. In one experiment in which the effects of disease and DDT sprays were compared, the levels of control were similar, although fewer larvae reached the later instars on the disease plots.

© CSIRO 1960

Committee on Publication Ethics

Rent Article (via Deepdyve) Export Citation Cited By (13) Get Permission

View Dimensions