Efficacy of Dermacor-X-100® Seed Treatment Against Diatraea saccharalis (Lepidoptera: Crambidae) on Rice
Keywords:
chlorantraniliprole, seed treatment, sugarcane borer, riceAbstract
The sugarcane borer, Diatraea saccharalis (F.) (Lepidoptera: Crambidae), which attacks sugarcane, corn, sorghum, sudan grass and rice, is a major agronomic pest in the southeastern United States. This study was conducted to investigate the efficacy of different rates of Dermacor-X-100® (active ingredient, chlorantraniliprole) seed treatments on D. saccharalis in rice in the laboratory, greenhouse and field. In laboratory assays using cut stems, Dermacor-X-100® resulted in 40-50% more mortality than in the control, while in greenhouse intact plant assays Dermacor-X-100® resulted in approximately 70-80% higher mortality compared to controls. In the field study, Dermacor-X-100® seed treatment resulted in significantly lower numbers of borer entry and exit holes per plant. Results from this study suggest that Dermacor-X-100® seed treatment could be used as a valuable component of integrated pest management program for stem borers in Louisiana rice. As the boring behavior of larvae, life cycle and injury caused by most stem borers are generally similar, and because the active ingredient in Dermacor-X-100® is highly efficacious against lepidopteran pests, results for D. saccharalis may extend to management of other stem boring species as well.
El barrenador de la caña, Diatraea saccharalis (F.) (Lepidoptera: Crambidae), que ataca la caña de azúcar, el maíz, el sorgo, el pasto sudán y el arroz, es una de las principales plagas agronómicas en el sureste de los Estados Unidos. Se realizó este estudio para investigar la eficacia de diferentes tasas de tratamientos de semillas con Dermacor-X- 100® (ingrediente activo, clorantraniliprol) contra D. saccharalis sobre el arroz en el laboratorio, invernadero y campo. En ensayos de laboratorio utilizando tallos cortados, Dermacor- X-100® resultó en una mortalidad del 40-50% más que en el control, mientras que en los ensayos de invernadero con plantas intactas, Dermacor-X-100® resultó en una mortalidad de aproximadamente del 70-80% mayor en comparación con los controles. En el estudio de campo, el tratamiento de semillas con Dermacor-X-100® resultó en un número significativamente más bajo de agujeros de entrada y salida de los barrenador por planta. Los resultados de este estudio sugieren que el tratamiento de semillas con Dermacor-X-100® podría ser utilizada como un componente valioso en un programa de manejo integrado de plagas para los barrenadores del tallo del arroz en Louisiana. Como el comportamiento de las larvas, el ciclo de vida y de daño causado por la mayoría de los barrenadores del tallo son generalmente similares, y debido a que el ingrediente activo en Dermacor-X-100® es altamente eficaz contra plagas de lepidópteros, los resultados de D. saccharalis puede extenderse al manejo de otras especies de barrenadores.
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