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Evaluación de prácticas culturales para el control de Thrips palmi (Thysanoptera: Thripidae) en pimentón

Entomotrópica: Revista internacional para el estudio de la entomología tropical, ISSN 1317-5262, Vol. 19, Nº. 1, 2004, pags. 39-46
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ABSTRACT Pepino Cucumis sativus L., y caraota Phaseolus vulgaris L. como cultivos trampa; cáscara de arroz y plástico color plateado como coberturas inerte del suelo, así como pimentón asociado con pepino y con caraota, fueron evaluados para el control de Thrips palmi (Thysanoptera: Thripidae), en siembras experimentales de pimentón Capsicum annum L. Se utilizó un diseño experimental de bloques al azar, con siete tratamientos y cuatro repeticiones. Los resultados obtenidos indican que el tratamiento Pimentón asociado con Caraota como Cultivo Trampa (PACCT) presentó los menores promedios de larvas y adultos por hoja (0,48 y 0,25) seguido de la Cobertura Vegetal Seca (CVS) (0,55 y 0,29), Cobertura Plástica Plateada (CPP) (0,71 y 0,29), Pimentón Asociado con Pepino como Cultivo Trampa (PAPeCT) (0,79 y 0,22), sin diferencias significativas (p>0,05) entre ellos, pero si con el resto. Los mayores valores se registraron en Pepino como Cultivo Trampa (PeCT) (12,06 y 9,15), Caraota como Cultivo Trampa (CCT) (6,60 y 4,48) y el Testigo Siembra Tradicional (TST) (5,70 y 3,22), sin diferencias significativas (p>0,05) entre CCT Y TST, pero sí con PeCT. Los mismos tratamientos presentaron los menores promedios de larvas y adultos por flor y las mismas significaciones estadísticas, así como los tratamientos de mayores poblaciones. El CPP presentó el mayor rendimiento en kilogramos por hectárea (14 236), seguido de CVS (12 708), PACCT (11 153), PAPeCT (9 902) y TST (2 430) , sin observar diferencias significativas (p>0,05) entre los cuatro primeros tratamientos pero sí respecto al TST. El uso del pepino y la caraota como cultivos trampa, la cobertura plástica plateada y la cáscara de arroz como coberturas inertes, son alternativas viables y de bajo costo, muy convenientes para pequeños agricultores en el control de las poblaciones de Thrips palmi en pimentón y obtener rendimientos aceptables.

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