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Isolates of Sphaceloma and Elsinoë spp. were collected from Euphorbia brasiliensis, Eu. heterophylla, Eu. pulcherrima, Jatropha aconitifolia var. papaya, Manihot carthaginensis, and M. esculenta in Mexico, Costa Rica, the Dominican Republic, and Colombia. M. carthaginensis and J. aconitifolia var...


Zeigler, Robert S.Lozano, J.C.[The relationship of some Elsinoë and Sphaceloma species pathogenic on cassava and other Euphorbiaceae in Central and South America]The relationship of some Elsinoë and Sphaceloma species pathogenic on cassava and other Euphorbiaceae in Central and South America

The incidence and severity of several diseases affecting cassava in monoculture and in association with maize and/or yam in the departments of Cordoba, Bolivar, Sucre, and Atlantico (Colombia) were assessed. Leaf spots (brown leaf spot, white leaf spot, blight leaf spot) and CBB were the most com...


Laberry, R.Lozano, J.C.[Enfermedades en cultivos de yuca asociados con maiz y name en Cordoba, Bolivar, Sucre y Atlantico]Enfermedades en cultivos de yuca asociados con maiz y name en Cordoba, Bolivar, Sucre y Atlantico

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

The existence of endophytes in cassava was suspected for the following reasons: (a) A wide range variation of root yield is frequent among disease-symptomless plants growing on the same plot; (b) root yield of low-yielding, virus-free plants of traditional clones can be increased by meristem cult...


Rivera, MFLaberry Saavedra, Rafael AlbertoLozano, J.C.[Evidences for endophytes parasiting traditional clones of cassava (Manihot esculenta Crantz)]Evidences for endophytes parasiting traditional clones of cassava (Manihot esculenta Crantz)

Recent investigations on cassava and its relationships with Pseudomonas fluorescens and P. putida have shown (a) Isolates with none or very mild inhibition of pathogenic bacteria and fungi; (b) isolates that strongly inhibit pathogenic bacteria, with none or very mild inhibition of fungi; (c) iso...


Lozano, J.C.Laberry Saavedra, Rafael Alberto[Biological control of cassava diseases using fluorescent pseudomonads]Biological control of cassava diseases using fluorescent pseudomonads

Lozano, J.C.Toro, Julio C.Castro Merino, A.Bellotti, Anthony C.[Produçao de material de plantio da mandioca]Produçao de material de plantio da mandioca

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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