ISSN: 1659-2751



Evaluation of Four Natural Insecticides for the Control of Pineapple Fruit Borer, Strymon megarus Godart (Lepidoptera: Lycaenidae), in Pineapple


The insecticide carbaryl is currently one of the most commonly used insecticides for control of the pineapple fruit borer, Strymon megarus (Godart). To evaluate less toxic alternative control tactics, four natural biopesticides were evaluated for control of S. megarus. Beauveria bassiana, Metarrhizium anisopliae, Bacillus thuringiensis, and a plant extract from Quassia amara were compared with carbaryl and an untreated control. All treatments except carbaryl were applied seven times on a 7-day interval. Carbaryl was applied twice, with 10 days between the applications. The untreated control had over 50 % fruit damage from S. megarus. All other treatments had significantly less fruit damage than the untreated control. There were no significant differences in the level of fruit damage between carbaryl and B. thuringiensis. B. thuringiensis was themost economical treatment when applied mechanically. Based on the results of this study, B. thuringiensis appears to be an acceptable biological alternative to carbaryl for control of S. megarus on pineapple.

Key words: Bacillus thuringiensis, fruit borer, Beauveria bassiana, carbaryl, Metarrhizium anisopliae, pineapple cultivar MD2, Quassia amara, Strymon megarus, tecla.

Artículo en español (pdf) (1379)