A total of 18 bean var. with different degrees of rust resistance in the field were subjected to 4 treatments, to obtain high severity of Uromyces phaseoli under low RH. Treatments were (1) greenhouse inoculation, with optimum temp. and RH for disease development, (2) field inoculation in infecti...
Castaño Zapata, Jairo
,
Jara, Carlos E.
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[Metodo para obtener alta severidad de la roya del frijol en areas con humedad relativa baja]
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Metodo para obtener alta severidad de la roya del frijol en areas con humedad relativa baja
Twenty-four Xanthomonas campestris pv. phaseoli and X. phaseoli var. fuscans isolates, obtained from different countries and isolated from different host plants (Phaseolus vulgaris and P. lunatus, among others), were compared with nonpathogenic isolates of Xanthomonas using the restriction fragme...
Otoya, María Mercedes
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Pastor Corrales, Marcial A.
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[Utilizacion de la tecnica de RFLP`s como herramienta para estudiar la diversidad genetica de los patogenos que causan la bacteriosis comun del frijol]
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Utilizacion de la tecnica de RFLP`s como herramienta para estudiar la diversidad genetica de los patogenos que causan la bacteriosis comun del frijol
Potato (Solanum tuberosum) production in Africa is rapidly expanding and becoming increasingly important. As its geographical production range broadens, so does its potential to host new pests and diseases. Following the discovery that potato can be affected by Scutellonema bradys, further studie...
Coyne, D.L.
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Akpheokhai, L.I.
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Adeniran, A.F.
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[The yam nematode (Scutellonema bradys), a potential threat to potato (Solanum tuberosum) production in West Africa]
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The yam nematode (Scutellonema bradys), a potential threat to potato (Solanum tuberosum) production in West Africa
El incremento y refrescamiento del germoplasma del Brachiaria se realiza, bajo condiciones de campo, en la estación Santa Rosa en las cercanías de Popayán por ser una localidad en donde la producción de semilla es buena. Sin embargo las condiciones de precipitación (más de 2000mm) y temperatura (...
García, S.X.
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Pineda López, Benjamín
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Salazar Erazo, SM
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[Presencia de la enfermedad del mal de azúcar (Sphacelia spp.) en tres especies del pasto Brachiaria (panicoidea, poaceae)]
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Presencia de la enfermedad del mal de azúcar (Sphacelia spp.) en tres especies del pasto Brachiaria (panicoidea, poaceae)
Xanthomonas oryzae pathovar oryzae (Xoo) and X. oryzae pv. oryzicola (Xoc) cause bacterial diseases in rice: leaf blight and leaf streak, respectively. Although both the Asian and the African strains of Xoo induce similar symptoms, they are genetically different, with the African Xoo strains bein...
Soto Suárez, M.
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González, C.
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Piegu, B
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Tohme, Joseph M.
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Verdier, Valérie
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[Genomic comparison between Xanthomonas oryzae pv.oryzae and Xanthomonas oryzae pv.oryzicola,usingsuppression-subtractive hybridization]
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Genomic comparison between Xanthomonas oryzae pv.oryzae and Xanthomonas oryzae pv.oryzicola,usingsuppression-subtractive hybridization
Isolates of Pseudomonas syringae pv. phaseolicola from Africa and other bean growing areas were categorized into nine races on the basis of their reactions to eight differential cultivars following artificial inoculation. Eight hundred and ninety-three isolates representing 303 disease occurrence...
Taylor, JD
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Teverson, D.M.
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Allen, David J.
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Pastor Corrales, Marcial A.
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[Identification and origin of races of Pseudomonas syringae pv. phaseolicola from Africa and other bean growing areas]
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Identification and origin of races of Pseudomonas syringae pv. phaseolicola from Africa and other bean growing areas
The fungus Sphaceloma manihoticola causes superelongation disease in cassava, a starchy root crop grown widely in the tropics. Isolates were collected from infected plants grown in six localities of Colombia. Morphological analyses of the fungus showed that colony growth and color are not stable ...
Álvarez, E.
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Molina, ML
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[Characterizing the Sphaceloma fungus, causal agent of superelongation disease in cassava]
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Characterizing the Sphaceloma fungus, causal agent of superelongation disease in cassava
Anthracnose, caused by Colletotrichum gloeosporioides, is the most important and widespread disease of Stylosanthes, a diverse tropical and subtropical forage legume naturally distributed in Central and South America. Although South American isolates of C. gloeosporioides are known to be variable...
Kelemu, Segenet
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Badel, JL
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Moreno, CX
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[Virulence spectrum of South American isolates of Colletotrichum gloeosporioides on selected Stylosanthes guianensis genotypes]
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Virulence spectrum of South American isolates of Colletotrichum gloeosporioides on selected Stylosanthes guianensis genotypes
La Antracnosis, causada por el hongo Colletotrichum gloeosporioides, ocasiona pérdidas hasta del 90% en huertos no tecnificados de guanábana. Para el control de la enfermedad se requiere conocer bien la sintomatología y las características del agente causal. Teniendo en cuenta que existe poca inf...
Álvarez, E.
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Ospina, CA
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Mejía De Los Rios, J.F.
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Llano Rodríguez, Germán Alberto
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[Caracterización morfológica, patogénica y genética del agente causal de la antracnosis (Colletotrichum gloeosporioides) en guanábana (Annona muricata) en el Valle del Cauca]
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Caracterización morfológica, patogénica y genética del agente causal de la antracnosis (Colletotrichum gloeosporioides) en guanábana (Annona muricata) en el Valle del Cauca
Con el objetivo de evaluar bajo condiciones de invernadero genotipos de plátano y banano frente a poblaciones de Mycosphaerella fijiensis Morelet de diferente virulencia y origen, se estableció una colección de 125 aislamientos monospóricos obtenidos en 10 departamentos de Colombia. Se selecciona...
Cuéllar Quintero, L.A.
,
Álvarez, E.
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Castaño Zapata, Jairo
,
[Evaluación de resistencia de genotipos de plátano y banano a la Sigatoka Negra (Mycophaerella fijiensis Morelet.)]
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Evaluación de resistencia de genotipos de plátano y banano a la Sigatoka Negra (Mycophaerella fijiensis Morelet.)