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Identification of cassava diseases and scoring the susceptibility of the cultivars

By: Contributor(s): Material type: TextTextLanguage: English Publication details: Umudike, NG National Root Crops Research Institute (NRCRI) 1977Description: 9 pSubject(s): LOC classification:
  • 17118
Summary: Se discuten las 2 principales enfermedades de la yuca, CBB (Xanthomonas campestris pv. manihotis) y AMD. La severidad del CBB en yuca, la cual se caracteriza por una mancha foliar angular, exudacion gomosa, marchitamiento y muerte descendente, se mide por el grado de marchitamiento y de muerte, descendente observado. Este se clasifica en 5 grupos. El AMD se caracteriza por una clorosis, la cual alterna con zonas de tejido verde oscuro, por tanto, las hojas afectadas presentan un modelo de mosaico. En algunos casos hay malformacion y debilitamiento progresivo. La severidad con base en la clorosis y la malformacion tambien se clasifica en 5 grupos. (RA-CIAT)Summary: Two major diseases of cassava, CBB (Xanthomonas campestris pv. manihotis) and CAMD are discussed. The severity of CBB on cassava, which is characterized by angular leaf spot, gum exudation, wilting, and die-back is measured by the degree of wilting and die- back observed. This is graded into 5 classes. CAMD is characterized by chlorosis, which alternates with islands of deep green tissue thus giving the affected leaves a mosaic pattern. In severe cases there are malformation and stunting. The severity based on chlorosis and malformation is also graded into 5 classes. (AS)
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Books Books CIAT Library Document collection CINFOS Document Collection CINFOS 17118 (Browse shelf(Opens below)) c.1 Short Loan 100059742
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Se discuten las 2 principales enfermedades de la yuca, CBB (Xanthomonas campestris pv. manihotis) y AMD. La severidad del CBB en yuca, la cual se caracteriza por una mancha foliar angular, exudacion gomosa, marchitamiento y muerte descendente, se mide por el grado de marchitamiento y de muerte, descendente observado. Este se clasifica en 5 grupos. El AMD se caracteriza por una clorosis, la cual alterna con zonas de tejido verde oscuro, por tanto, las hojas afectadas presentan un modelo de mosaico. En algunos casos hay malformacion y debilitamiento progresivo. La severidad con base en la clorosis y la malformacion tambien se clasifica en 5 grupos. (RA-CIAT) spa

Trabajo presentado at NAFPP workhop, NRCRI, Umudike, Nigeria, 1977

Two major diseases of cassava, CBB (Xanthomonas campestris pv. manihotis) and CAMD are discussed. The severity of CBB on cassava, which is characterized by angular leaf spot, gum exudation, wilting, and die-back is measured by the degree of wilting and die- back observed. This is graded into 5 classes. CAMD is characterized by chlorosis, which alternates with islands of deep green tissue thus giving the affected leaves a mosaic pattern. In severe cases there are malformation and stunting. The severity based on chlorosis and malformation is also graded into 5 classes. (AS) eng

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