Abstract
The control efficiency of a Phthorimaea operculella granulovirus isolate from Costa Rica (PhopGV-CR1) against the concurrent insect pests P. operculella (Zeller) and Tecia solanivora (Povolny) (Lepidoptera: Gelechiidae) was evaluated. In warehouses, the best control efficiency was achieved with a powder formulate applied inside bags, which reduced injury over 70 % compared with the untreated controls. In the field, liquid and powder virus formulations significantly reduced injury between 56.2 and 81.7 % compared with the untreated controls, and were as efficient as chemical treatments. The efficiency of formulations stored at −20 °C for six months (liquid) or at ambient temperature for three months (powder) was maintained, but higher temperatures and/or longer exposure times resulted in loss of pathogenicity. The data presented here favor the inclusion of granulovirus formulations of PhopGV-CR1 in Integrated Pest Management programs against tuberworms in Costa Rica and give clues on storage conditions for the growers in this country.
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We are very grateful to Carlos Segura for supplying us with hundreds of kilograms of potatoes for the warehouse and field assays. This research was financed with funds from the Project Plantón-Pacayas (INTA, Costa Rica).
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Gómez-Bonilla, Y., López-Ferber, M., Caballero, P. et al. Granulovirus formulations efficiently protect stored and field potatoes from Phthorimaea operculella and Tecia solanivora in Costa Rica. BioControl 58, 215–224 (2013). https://doi.org/10.1007/s10526-012-9473-z
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DOI: https://doi.org/10.1007/s10526-012-9473-z