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Information on some diseases and pests that attack cassava, as well as the symptoms induced by nutritional deficiencies and toxicities and damage resulting from the misuse of herbicides are given in this manual. Specific and general recommendations regarding the control of the described problems ...

En este manual se presenta informacion sobre algunas de las enfermedades y plagas que atacan a la yuca, como tambien los sintomas inducidos por deficiencias y toxicidades nutricionales y danos debidos al uso incorrecto de los herbicidas. Se incluyen recomendaciones generales y especificas para el...


Lozano, J.C.Bellotti, Anthony C.Reyes, J.A.Howeler, Reinhardt H.Leihner, D.E.Doll, J.[Problemas en el cultivo de la yuca]Problemas en el cultivo de la yuca

The herbicides dalapon, glyphosate, paraquat, MSMA, and diuron were evaluated for their postemergence selectivity in cassava (Manihot esculenta Crantz). Four methods of application were also tested: with a shield, directed without a shield, and hitting the lower 25 or 50 percent of the plant. In ...


Piedrahíta Castañeda, WilsonDoll, J.[Herbicidas postemergentes en yuca (Manihot esculenta Crantz) selectividad, metodos de aplicacion e interaccion con edad]Herbicidas postemergentes en yuca (Manihot esculenta Crantz) selectividad, metodos de aplicacion e interaccion con edad

Two studies were conducted to determine the best integrated weed control system for cassava (Manihot esculenta Crantz), in addition to the selectivity of preplant incorporated (PPI) herbicides and their interactions with the planting system. Three preemergence treatments followed by hand weeding ...


Piedrahíta Castañeda, WilsonMesia P., R.Doll, J.[Control integrado de malezas y uso de herbicidas PSI en yuca (Manihot esculenta Crantz)]Control integrado de malezas y uso de herbicidas PSI en yuca (Manihot esculenta Crantz)

A survey of weeds and weeding practices was carried out by a team of agricultural economists and agronomists on 283 farms in 5 cassava-growing regions of Colombia at 3 times during a cropping season. From 71-78 percent of the weed species present were broad- leaved species. As cassava grew older,...


Doll, J.Pinstrup-Andersen, PerDíaz, R.O.[An agro-economic survey of the weeds and weeding practices in cassava (Manihot esculenta Crantz) in Colombia]An agro-economic survey of the weeds and weeding practices in cassava (Manihot esculenta Crantz) in Colombia
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)

A survey was made of weed species, weed densities and common weeding practices on 3 visits during the growing season to some 300 farms in 5 cassava-growing regions of Colombia. Broadleaf weeds were the commonest in all regions (62-65 percent of the species); there was a shift to slightly more gra...


Díaz, R.O.Pinstrup-Andersen, PerDoll, J.[Las malezas y su control en el cultivo de la yuca en Colombia]Las malezas y su control en el cultivo de la yuca en Colombia

Information on some diseases and pests that attack cassava, as well as the symptoms induced by nutritional deficiencies and toxicities and damage resulting from the misuse of herbicides are given in this manual. Specific and general recommendations regarding the control of the described problems ...

En este manual se presenta informacion sobre algunas de las enfermedades y plagas que atacan a la yuca, como tambien los sintomas inducidos por deficiencias y toxicidades nutricionales y danos debidos al uso incorrecto de los herbicidas. Se incluyen recomendaciones generales y especificas para el...


Lozano, J.C.Bellotti, Anthony C.Reyes, J.A.Howeler, Reinhardt H.Leihner, D.E.Doll, J.[Field problems in cassava]Field problems in cassava

Tropical agroecosystems constitute diversified systems with crops arranged in polycultural patterns. Weeds are important components of these systems and condition insect diversity and stability. In an attempt to gather experimental evidence as a basis for tropical pest management strategies, 9 fi...


Altieri, Miguel A.Doll, J.Schoonhoven, Aart van[Interacciones entre insectos y malezas en mono y policultivos de maiz y frijol]Interacciones entre insectos y malezas en mono y policultivos de maiz y frijol

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