Efficacy of an alphabaculovirus-based biological insecticide for control of Chrysodeixis chalcites (Lepidoptera: Noctuidae) on tomato and banana crops.

摘要: BACKGROUND Chrysodeixis chalcites (Esper) is a major pest of tomato in Mediterranean countries and attacks banana the Canary Islands (Spain). The efficacy Chrysodeixis single nucleopolyhedrovirus (ChchSNPV-TF1) was evaluated plant growth chambers greenhouse trials performed on plants respectively. Treatments were applied using compressed air sprayer. RESULTS Mean (± SE) lethal infection varied from 77 ± 10% to 94 ± 3% second-instar larvae fed for 2 days treated with 2 × 106 5 × 107 virus occlusion bodies (OBs) L−1, increasing ∼100% after 7 days. Mortality collected at different intervals post-application 54 ± 10% 96 ± 4% treatments involving 1 × 108–1 × 109 OBs whereas indoxacarb (Steward 30% WG) Bacillus thuringiensis var. kurstaki (Biobit 16% WP) produced between 22 ± 6% 32 ± 5% mortality. All significantly reduced defoliation compared untreated controls. Application 1 × 109 L−1 3–4-fold more effective than chemical or B. treatments. Larvae acquired rapidly when feeding plants, but this difference disappeared following >60 min feeding. CONCLUSION This information should prove useful registration ChchSNPV-TF1 as bioinsecticide Europe. © 2014 Society Chemical Industry