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Fischer, Albert J.[Resistencia a herbicidas y umbrales de acción para el manejo integrado de malezas]Resistencia a herbicidas y umbrales de acción para el manejo integrado de malezas

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.)

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
Camacho, A.J.Argel M., Pedro J.Doll, J.[Control de gramalote (Paspalum fasciculatum Willd.) con dalapon y glifosato y establecimiento de pasto Para (Brachiaria mutica)]Control de gramalote (Paspalum fasciculatum Willd.) con dalapon y glifosato y establecimiento de pasto Para (Brachiaria mutica)

Red rice (Oryza satlva L ) has been a serious problem in rice fields for hundreds of years and even now no effective control measure exist. In this study, new approaches were evaluated. Flooding for two weeks prior to seeding IR-22 eliminated 99 percent of the tall variety Bluebonnet 50, which ha...


Cheaney, Robert L.López, Rodrigo L.Doll, Jerry D.[Algunos métodos promisorios para el control de arroz rojo y arroz espontáneo de variedades indeseables]Algunos métodos promisorios para el control de arroz rojo y arroz espontáneo de variedades indeseables

An expt. was established in Esparza (Costa Rica), on the integrated management of web blight (Thanatephorus cucumeris) in common beans under the min. tillage system. Var. Porrillo 70 (intermediate resistance) and ICA Pijao (susceptible) were used. Herbicides gliphosate and paraquat (1.0 kg/ha) of...


Sánchez, H.M.Alfaro M., R.Morales G., A.MORA B., B.Gálvez E., Guillermo E.[Manejo integrado de mustia hilachosa causada por Thanatephorus cucumeris (Frank) Donk en frijol comun]Manejo integrado de mustia hilachosa causada por Thanatephorus cucumeris (Frank) Donk en frijol comun
Castaño Zapata, Jairo[Efecto de cuatro herbicidas y un fungicida sobre el crecimiento de Rhizoctonia solani Kuhn en condiciones de laboratorio]Efecto de cuatro herbicidas y un fungicida sobre el crecimiento de Rhizoctonia solani Kuhn en condiciones de laboratorio

In view of the lack of information on the use of herbicides in polycultures including non-commercial crop species, 2 expt. were designed to identify herbicides and doses suitable for crop associations including cassava. A total of 6 products were tested single or in mixtures having been chosen fo...


López M., J.Leihner, D.E.[Control quimico de malezas en policultivos con yuca (Manihot esculenta Crantz)]Control quimico de malezas en policultivos con yuca (Manihot esculenta Crantz)

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