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espanolEl estudio consistio en evaluar el efecto del extracto acuoso obtenido de ramas de cacao sanas y extracto etanolico de ramas infectadas por el hongo Moniliophthora perniciosa Stahel, sobre el follaje de siete malezas (cinco de hoja ancha y dos de hoja angosta). El porcentaje de necrosis en hojas se determino en base a una escala nominal (0-7). Para las malezas de hoja angosta el mejor tratamiento T6 al dia 15 presento una severidad de 4.38%, al dia 30 este valor desciende 4.29% para finalmente al dia 45 dar un valor de 3.44%, pese a que la planta en los primeros dia tiene una severidad alta, esta obtiene resistencia a medida que pasan los dias de evaluacion, asi mismo el T2 al dia 15 tiene una severidad 4.24% aumentando este valor a los 30 dias a 4.31%, pero a los 45 dias este valor disminuye a 4.16%. Para las malezas de hoja ancha el mejor tratamiento los primeros 15 dias fue el T1 4.05% este valor descendiendo a los 30 dias 4.01% y se mantiene hasta el dia 45, asi mismo la severidad en los 15 dias para los T3 (3.90%) y T5 (4.01), despues a los 30 dias aumento ligeramente T3 (3.93%) y T5 (4.06), pero a los 45 dias decrece T3 (3.88%) y T5 (3.25), en ambas malezas de hoja ancha y angosta se asume que la planta los primeros dias no tiene la capacidad de resistir el ataque causado por los extractos, pero a partir de los dias 30 y 45, este obtiene resistencia y se recupera posiblemente mediante mecanismos quimiotaxonomicos o fisiologicos. EnglishTThe study was to evaluate the effect of aqueous extract of cocoa branches ethanolic extract healthy and infected branches Moniliophthora perniciosa Stahel fungus on the foliage of seven weed (five-leaved and two narrow leaf). The percentage of necrosis on leaves was determined based on a nominal scale (0-7). To narrow leaf weeds the best treatment T6 at day 15 showed a severity of 4.38% at day 30 this value drops to 4.27% at day 45 finally give a value of 3.44%, although the plant in the early days has high severity, this resistance gets each passing day trial, also the day 15 T2 has a 4.24% severity increasing to 30 days 4.31%, but at 45 days this value decreases to 4.16%. For broadleaves the best treatment for the first 15 days was 4.05% Q1 this value down to 4.01% 30 days and maintained until day 45, and the severity thereof within 15 days for T3 (3.90%) and T5 (4.01), then at 30 days increased slightly T3 (3.93%) and T5 (4.06), but at 45 days decreased T3 (3.88%) and T5 (3.25), in both broadleaf and narrow is assumes the first day plant is not able to resist the attack caused by the extracts, but from day 30 and 45, and this resistance obtained is posible recovered by chemotaxonomic and physiological mechanisms.

EFECTO ALELOPÁTICO DE ESCOBA DE BRUJA (Moniliophthora perniciosa Stahel.) INOCULADAS EN SIETE ESPECIES DE MALEZAS