Plant Protect. Sci., 2007, 43(3):94-102 | DOI: 10.17221/2245-PPS

Influence of baculovirus AdorGV on the mortality of larvae and pupae of summer fruit tortrix Adoxophyes orana in laboratory conditions

Karel Pepperný

Czech University of Life Sciences Prague, Prague-Suchdol and Crop Research Institute, Prague-Ruzyně, Czech Republic

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 1^st instar was 100%, compared to a mortality of 68% in the control. In both, the larvae died before the 5^th larval instar. With larvae infected in subsequent instars the mortality rate declined gradually (96%-72%-40%-12%) and death occurred predominantly in the 5^th larval instar. The mortality of larvae in the controls was low (12%-12%-0%-0%). The mortality of pupae from larvae infected in the 2^nd, 3^rd and 4^th 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 5^th 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.

Keywords: summer fruit tortrix; Adoxophyes orana; AdorGV; mortality; larvae; pupae

Published: September 30, 2007  Show citation