Uso de insecticidas contra Dioryctria horneana (Lepidóptera: Phycitidae)
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Abstract
En el presente trabajo se incluyen los resultados obtenidos con el uso de un grupo de insecticidas aplicados directamente al fuste, sin la eliminación de la resina característica de los ataques de D. horneana, y de un granulado sistemático aplicado al suelo. Se ensayaron los siguientes insecticidas y dosis (en porcentaje de sustancia activa): Bi-58 (0,3; 0,6; 1,2); malathion (1,0; 1,5; 2,5); parathion-methyl (0,3; 0,6; 1,2); y carbofuran 5 G, que se aplicó al suelo a razón de 70 y 100 g de producto comercial por planta y se enterró a 5 cm. de profundidad. Se trataron parcelas de Pinus cubensis Griseb de seis años de edad, establecidas en la meseta de Mayarí, provincia de Holguín. Se evaluó el incremento en el número de ataques por el insecto a los 15, 30 y 60 días. Para la última evaluación se precisó que las variantes con carbofuran mostraron los mejores resultados, mientras las otras variantes no resultaron efectivas. Se recomienda profundizar en el estudio del uso de carbofuran y de otros insecticidas sistémicos contra D. horneana.
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