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Doll, Jerry D.Piedrahíta Castañeda, Wilson[Control químico de malezas en arroz de riego con semilla directa y semilla pregerminada]Control químico de malezas en arroz de riego con semilla directa y semilla pregerminada

A four-season trial was conducted using continuous maize (Zea mays L.) and soybeans (Glicine max (L.) Merr.) with the continuous use, rotation or combination of various herbicides to determine weed species shifts. No weed species increased in maize treated for four seasons with atrazine (2-chloro...


Doll, Jerry D.Piedrahíta Castañeda, Wilson[Herbicide and crop rotation effects on the weed complex]Herbicide and crop rotation effects on the weed complex

Doll, Jerry D.Piedrahíta Castañeda, Wilson[Methods of weed control in cassava]Methods of weed control in cassava

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

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

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