Distribución e identificación de especies hospedantes de heterodera glycines ichinohe raza 3 en el valle del cauca
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Quintero, Javier
Rebellón, Antonio
Varón de Agudelo, Francia
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1988-01-01
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Se dividió la parte plana del Valle del Cauca en tres zonas (norte, centro y sur), habiéndose visitado 33 fincas. En la zona norte las malezas con mayor porcentaje de frecuencia y distribución en los cultivos de soya fueron Digitaria horizontalis, Echinochloa colonum y Leptochloa filiformis; en la zona centro Ipomoea hirta, Amaranthus dubius y Echinochloa colonum y en la zona sur predominaron Ipomoea hirta, Portulaca oleracea Cyperus rotundus. Los análisis de muestras de suelo y raíces indicaron que H. glycines se encuentra distribuido en todo el Valle del Cauca, presentando la zona sur (Candelaria, Palmira y Puerto Tejada) las mayores poblaciones. Entre las especies evaluadas (malezas, cultivos, leguminosas forrajeras y silvestres), solamente Glycine max y Phaseolus vulgaris se consideraron como susceptibles a H. glycines raza 3. y P. angularis y P. multiflora permitieron muy poca infección y multiplicación del nemátodo.
A nematode recognition of Heterodera glycines was focused on crops of soybean. Valle del Cauca was divided in three zones (northen, central and southern) and 33 farms were visited. The results of the analysis on samples of soils and roots showe that Heterodera glycines is scattered throughout Valle del Cauca, being the southern zone (Palmira, Candelaria and Puerto Tejada) the one having the highest standards in nematode population. Weeds showing a greater frequency percentage were : Digitaria horizontalis, Echinochloa colonum and Leptochloa filiformis, in the northen zone; Ipomoea hirta, Amaranthus dubius and Echinochloa colonum, in the central zone, and Ipomoea hirta, Portulaca oleracea and Cyperus rotundus, in the southern zone , From among the whole species evaluated (weeds, crops, leguminous a n d fodder plants), Glycine max and Phaseolus vulgaris were considered to be susceptible to H. Glycines race 3. Phaseolus angularis y P. multiflora let low population levels.
A nematode recognition of Heterodera glycines was focused on crops of soybean. Valle del Cauca was divided in three zones (northen, central and southern) and 33 farms were visited. The results of the analysis on samples of soils and roots showe that Heterodera glycines is scattered throughout Valle del Cauca, being the southern zone (Palmira, Candelaria and Puerto Tejada) the one having the highest standards in nematode population. Weeds showing a greater frequency percentage were : Digitaria horizontalis, Echinochloa colonum and Leptochloa filiformis, in the northen zone; Ipomoea hirta, Amaranthus dubius and Echinochloa colonum, in the central zone, and Ipomoea hirta, Portulaca oleracea and Cyperus rotundus, in the southern zone , From among the whole species evaluated (weeds, crops, leguminous a n d fodder plants), Glycine max and Phaseolus vulgaris were considered to be susceptible to H. Glycines race 3. Phaseolus angularis y P. multiflora let low population levels.
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digitaria horizontalis ; Echinochloa colonum ; leptochloa filiformis ; ipomoea hirta ; amaranthus dubius ; echinochloa colonum ; portulaca oleracea ; cyperus rotundus ; Heterodera glycines ; digitaria horizontalis ; Echinochloa colonum ; leptochloa filiformis ; ipomoea hirta ; amaranthus dubius ; echinochloa colonum ; portulaca oleracea ; cyperus rotundus ; malezas ; especies hospedantes