Influence of baculovirus AdorGV on the mortality of larvae and pupae of summer fruit tortrix Adoxophyes orana in laboratory conditions
Pepperny, K.,Ministerstvo Zemedelstvi, Prague (Czech Republic). Odbor Potravinarske Vyroby a Legislativy
The mortality of larvae and pupae of Adoxophyes orana was examined by keeping larvae of each larval instar (L1-L5) on an artificial diet in laboratory conditions. Larvae were infected by using an artificial diet containing AdorGV-based CAPEX 2. Samples of uninfected larvae from each instar served as controls. The mortality of larvae infected in the 1st instar was 100% (68% in the control). In both cases, the larvae died before the 5th larval instar. With larvae infected in subsequent instars the mortality rate declined gradually (96%-72%-40%-12%) and death occurred predominantly in the 5th larval instar. The mortality of larvae in the controls was low (12%-12%-0%-0%). The mortality of pupae from larvae infected in the 2nd, 3rd and 4th instar was high (100%-86%-93%), and the mortality of larvae and pupae combined was close to 100%. Mortality of pupae developed from larvae infected in the 5th instar was 27% and that of larvae and pupae combined was 36%. The mortality of pupae developed from uninfected larvae in all controls was low (max. 8%). These results demonstrated the high efficacy of AdorGV to cause high mortality of larvae and pupae of Adoxophyes orana in laboratory conditions.
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