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[Properties of the nuclear polyhedrosis virus]
Voprosy Virusologii
|November 1, 1985
Summary
Barathra brassicae nucleopolyhedrovirus (NPV) infected Heliothis armigera caterpillars, initially replicating and inducing a latent virus. Subsequent passages showed the latent virus replacing the foreign NPV due to viral interference.
Area of Science:
- Entomology
- Virology
- Insect Pathology
Background:
- Nuclear polyhedrosis viruses (NPVs) are significant pathogens affecting Lepidoptera.
- Understanding virus-host interactions is crucial for biological control strategies.
Purpose of the Study:
- To investigate the infectivity and behavior of Barathra brassicae NPV in Heliothis armigera caterpillars.
- To analyze viral dynamics during serial passages in a heterologous host.
Main Methods:
- Serial passage of Barathra brassicae NPV in Heliothis armigera larvae.
- Monitoring viral replication and host response through successive generations.
- Assessing viral interference in mixed infections.
Main Results:
- Barathra brassicae NPV demonstrated high infectivity in Heliothis armigera.
- Co-infection led to the replication of B. brassicae NPV and induction of a latent H. armigera virus.
- In subsequent passages, the latent virus outcompeted and replaced the introduced NPV.
- Viral interference was observed in the second passage, reducing NPV activity.
Conclusions:
- Heliothis armigera caterpillars can be infected by Barathra brassicae NPV.
- A phenomenon of viral interference and competitive exclusion occurs, favoring the latent virus.
- These findings have implications for understanding viral ecology and potential applications in pest management.