Evaluación bajo condiciones de laboratorio de semillas Mucilaginosas de ocho especies de plantas tropicales como control biológico de larvas de mosquito (Diptera: Culicidae: Culex corniger
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Fecha
1991
Autores
Gallardo Loria, Roberto
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Editor
Universidad Nacional (Costa Rica)
Resumen
El presente informe describe una técnica alternativa de control biológico de larvas de mosquitos culicinos (Culex corniger) con semillas mucilaginosas de 8 especies de plantas tropicales; explica el modo que opera y evalúa a nivel de laboratorio su potencial y limitaciones en el control de mosquitos. Se evalua el porcentaje de atrapamiento y retención larval de Salvia chia, Hyptis pectinata, Salvia albajaca, Lepidium costarricense, Plantago mayor, P.australis, Guazuma ulmifolia y Nicandra physaloides sobre larvas de Culex corniger de 2° y 3° estadío. Los ensayos de laboratorio de las semillas mucilaginosas de hyptis pectinata (97.50%), Lepidium costarricense (78.75%) y Salvia chia (65.0%) indican que son las mejores alternativas, dentro de las especies evaluadas, para el control biológico de larvas de Culex corniger. La mejor respuesta en atrapamiento y retención larval se observó en Hyptis pectinata, la cual conforme transcurrió el periodo de observación aumentó su atrapamiento. Se determina que el contenido de celulosa del mucílago de las semillas, como la variable que explica el atrapamiento y retención diferencial en las distintas especies evaluadas. Las especies de mayor contenido de celulosa fueron Hyptis pectinata, Salvia chia y Lepidium costarricense con 31.60%, 29.91% y 29.37% respectivamente. Se sugiere como una alternativa, el uso de las semillas mucilaginosas tratadas térmicamente para el control de larvas de mosquitos, que pueden ser utilizadas de forma combinada con otros sistemas de control (culturales, químicos y otros métodos de control biológico) sobre reservarios de agua bajo volumen, como bebederos para animales, piscinas en abandono, floreros y otros pequeños reservarios naturales o artificiales.
This report describes an alternative technique for the biological control of culicine mosquito larvae (Culex corniger) with mucilaginous seeds of 8 species of tropical plants; explains how it operates and evaluates its potential and limitations in mosquito control at the laboratory level. The percentage of larval entrapment and retention of Salvia chia, Hyptis pectinata, Salvia albajaca, Costa Rican Lepidium, Plantago mayor, P.australis, Guazuma ulmifolia and Nicandra physaloides on 2nd and 3rd stage Culex corniger larvae is evaluated. Laboratory tests of the mucilaginous seeds of hyptis pectinata (97.50%), Costa Rican Lepidium (78.75%) and Salvia chia (65.0%) indicate that they are the best alternatives, within the evaluated species, for the biological control of Culex larvae corniger. The best response in larval entrapment and retention was observed in Hyptis pectinata, which, as the observation period passed, increased its entrapment. The cellulose content of the seed mucilage is determined as the variable that explains the entrapment and differential retention in the different species evaluated. The species with the highest cellulose content were Hyptis pectinata, Salvia chia and Costa Rican Lepidium with 31.60%, 29.91% and 29.37% respectively. It is suggested as an alternative, the use of heat-treated mucilaginous seeds for the control of mosquito larvae, which can be used in combination with other control systems (cultural, chemical and other biological control methods) on low water reservoirs. volume, such as troughs for animals, abandoned pools, vases and other small natural or artificial reservoirs.
This report describes an alternative technique for the biological control of culicine mosquito larvae (Culex corniger) with mucilaginous seeds of 8 species of tropical plants; explains how it operates and evaluates its potential and limitations in mosquito control at the laboratory level. The percentage of larval entrapment and retention of Salvia chia, Hyptis pectinata, Salvia albajaca, Costa Rican Lepidium, Plantago mayor, P.australis, Guazuma ulmifolia and Nicandra physaloides on 2nd and 3rd stage Culex corniger larvae is evaluated. Laboratory tests of the mucilaginous seeds of hyptis pectinata (97.50%), Costa Rican Lepidium (78.75%) and Salvia chia (65.0%) indicate that they are the best alternatives, within the evaluated species, for the biological control of Culex larvae corniger. The best response in larval entrapment and retention was observed in Hyptis pectinata, which, as the observation period passed, increased its entrapment. The cellulose content of the seed mucilage is determined as the variable that explains the entrapment and differential retention in the different species evaluated. The species with the highest cellulose content were Hyptis pectinata, Salvia chia and Costa Rican Lepidium with 31.60%, 29.91% and 29.37% respectively. It is suggested as an alternative, the use of heat-treated mucilaginous seeds for the control of mosquito larvae, which can be used in combination with other control systems (cultural, chemical and other biological control methods) on low water reservoirs. volume, such as troughs for animals, abandoned pools, vases and other small natural or artificial reservoirs.
Descripción
Gallardo Loria, R. (1991). Evaluación bajo condiciones de laboratorio de semillas Mucilaginosas de ocho especies de plantas tropicales como control biológico de larvas de mosquito (Diptera: Culicidae: Culex corniger). [Tesis de Licenciatura]. Universidad Nacional, Costa Rica.
Palabras clave
SEMILLA, SEED, PLAGAS DE INSECTOS, MOSQUITOS, BIOLOGIC CONTROL, CONTROL BIOLOGICO, PLANTAS TROPICALES