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Phyllody, previously unreported in Brazil, was observed in several cassava cv. and hybrids planted in exptl. plots of the Centro Nacional de Pesquisa de Mandioca e Fruticultura in Cruz das Almas. The effect of the disease on production is not known; however, it poses a serious threat to the cassa...


Fukuda, C.Paguio, O. de la R.Lozano, J.C.[Ocorrencia de "filodia" em mandioca]Ocorrencia de "filodia" em mandioca

Data on max. and min. severity of attacks by Xanthomonas campestris pv. manihotis, Choanephora cucurbitarum, and Sphaceloma manihoticola were gathered on commercial plantations located in 4 regions of Sucre, Colombia. Regional clones Venezolana and Preta were used. In the region of Bongo, neither...


Laberry, R.Lozano, J.C.[Efecto del origen del material de siembra y el sistema de cultivo en la severidad e incidencia del anublo bacterial, el anublo fungoso y el superalargamiento de la yuca]Efecto del origen del material de siembra y el sistema de cultivo en la severidad e incidencia del anublo bacterial, el anublo fungoso y el superalargamiento de la yuca

Greenhouse studies on pathogenic variability of Xanthomonas manihotis did not reveal the occurrence of distinct pathogenic races. The non-race status of the pathogen suggests that CBB could be well-controlled in the field by using known levels of genotype resistance in specific ecosystems and by ...


Elango, FritzLozano, J.C.[Pathogenic variability of Xanthomonas manihotis, the causal agent of cassava bacterial blight]Pathogenic variability of Xanthomonas manihotis, the causal agent of cassava bacterial blight

The predominant farming system in La Colorada (Magdalena, Colombia), where cassava is a subsistence crop, is briefly reviewed. The intensive land use has caused soil leaching and infestation with root pathogens such as Diplodia manihotis and Fusarium oxysporum and cassava production has decreased...


Laberry, R.Lozano, J.C.Acosta, A.El Sharkawy, M.[Sistema integral de produccion de yuca para La Colorada (Magdalena) una zona infestada de Diplodia manihotis y Fusarium oxysporum]Sistema integral de produccion de yuca para La Colorada (Magdalena) una zona infestada de Diplodia manihotis y Fusarium oxysporum

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

The symptoms caused in cassava by Scytalidium sp. and Diplodia manihotis are described and compared. NE Brazil and the northern coast and Valle del Cauca of Colombia are zones with appropriate ecological characteristics for an optimum disease development. Scytalidium sp. affected both roots and s...


Bejarano, C.A.Laberry, R.Orrego, A.Lozano, J.C.[La pudricion negra de la yuca (Manihot esculenta) causada por Scytalidium sp]La pudricion negra de la yuca (Manihot esculenta) causada por Scytalidium sp

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