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Doll, Jerry D.[Weed science at CIAT (Centro Internacional de Agricultura Tropica) and weed problems in Latin America]Weed science at CIAT (Centro Internacional de Agricultura Tropica) and weed problems in Latin America

In this study a new formulation of EPTC, the new products glyphosate and napropamide and high rates of butilate, vernolate and EPTC were tested in purple nutsedge (Cyperus rotundus L.). The slow release formulation of EPTC was more persistant than the regular EPTC. High rates (16 kgia/ha) of the ...


Piedrahíta Castañeda, WilsonDoll, Jerry D.[Aspectos recientes en el control del coquito (Cyperus rotundus L.)]Aspectos recientes en el control del coquito (Cyperus rotundus L.)

Some of the differences and similarities between the extension service agronomists and those of technical assistance were compared. Important differences in percent of time dedicated to weed control, sources of information and the importance that the farmers of each group assign to weed control w...


Doll, Jerry D.[La extensión agrícola y la asistencia técnica en el control de malezas en Colombia]La extensión agrícola y la asistencia técnica en el control de malezas en Colombia

Twenty-six herbicides were evaluated at 3 rates each in cassava (Manihot esculenta Crantz). For the 21 preemergence herbicides, planting was done before application in half the plot and then in the other half. After incorporating the 5 preplant-incorporated products, half the plot was ridged befo...


Doll, Jerry D.Piedrahíta Castañeda, Wilson[Margen de selectividad de varios herbicidas en la yuca]Margen de selectividad de varios herbicidas en la yuca

Cutting sedge (Scleria pterota Presl.) is a common weed in pastures. It grows vigorously and forms patches in poorly drained soils and appears uniformly dispursed in pastures on rolling land. It is unpalatable to cattle and is extremely competitive with pasture species. It was found that both diu...


Argel M., Pedro J.Doll, Jerry D.[Control de cortadera (Scleria pterota Presl.) y establecimiento de pasto]Control de cortadera (Scleria pterota Presl.) y establecimiento de pasto
Pidrahita C., WilsonMorales, LeopoldoDoll, Jerry D.[Coquito (Cyperus rotundus L.) morfología, crecimiento y desarrollo]Coquito (Cyperus rotundus L.) morfología, crecimiento y desarrollo
Doll, Jerry D.Piedrahíta Castañeda, Wilson[Effect of glyphosate on the sprouting of Cyperus rotundus L. tubers]Effect of glyphosate on the sprouting of Cyperus rotundus L. tubers

Since many farmers in the tropics plant crops in association, a study was conducted to determine the capacity of corn and edible beans (Phaseolus vulgaris) grown alone or in association to extract N, P and K. The effects of three soil types and three weed species on the absorptive capacity of the...


Morales, LeopoldoDoll, Jerry D.[Extracción de nutrimentos en la asociación maíz-frijol con tres especies de malezas]Extracción de nutrimentos en la asociación maíz-frijol con tres especies de malezas
Argel M., Pedro J.Doll, Jerry D.Piedrahíta Castañeda, Wilson[Observación del efecto de glifosato sobre la germinación de Paspalum virgatum]Observación del efecto de glifosato sobre la germinación de Paspalum virgatum

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