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Chacón Sánchez, María I.Jara, Carlos E.Castellanos, G.Posso G, CEBuruchara, Robin A.Cuasquer, Juan B.Pastor Corrales, Marcial A.[Genetic diversity and relation between common bean angular leaf spot fungus isolates from Africa and South America: genetic improvement implications]Genetic diversity and relation between common bean angular leaf spot fungus isolates from Africa and South America: genetic improvement implications

If we are to breed common bean (Phaseolus vulgaris L.) for durable resistance to diseases, we must understand pathogenic variation and find sources of resistance. Our first objective was to determine the patterns of pathogenic variation found among isolates of Phaeoisariopsis griseola (PG), the f...


Pastor Corrales, Marcial A.Jara, Carlos E.Singh, Shree P.[Pathogenic variation in, sources of, and breeding for resistance to Phaeoisariopsis griseola causing angular leaf spot in common bean]Pathogenic variation in, sources of, and breeding for resistance to Phaeoisariopsis griseola causing angular leaf spot in common bean

Fifty-three bean (Phaseolus vulgaris) accessions were evaluated for their reactions to infection by Macrophomina phaseolina under field and greenhouse conditions. A field nursery was established on an experimental farm near Santander de Quilichao, Colombia. All accessions were evaluated in paired...


Pastor Corrales, Marcial A.Abawi, G.S.[Reactions of selected bean accessions to infection by Macrophomina phaseolina]Reactions of selected bean accessions to infection by Macrophomina phaseolina

A Brazilian isolate of Fusarium oxysporum f. sp. phaseoli (F. o. f. sp. phaseoli) was used to determine the reactions of 66 lines of beans to the Fusarium yellows pathogen in greenhouse tests. The distal 1 cm of root tips of 1-wk-old seedlings grown in sterilized sand were removed, roots were dip...


Pastor Corrales, Marcial A.Abawi, G.S.[Reactions of selected bean germ plasm to infection by Fusarium oxysporum f. sp. phaseoli]Reactions of selected bean germ plasm to infection by Fusarium oxysporum f. sp. phaseoli

Over 150 bean (Phaseolus vulgaris) pure lines and accessions were evaluated in growth chamber and greenhouse trials for reactions to one or more populations of root-knot nematodes (Meloidogyne spp.) collected from Colombia or the United States. Bean pure lines and accessions were evaluated for ro...


Mullin, BAAbawi, G.S.Pastor Corrales, Marcial A.Kornegay, Julia L.[Reactions of selected bean pure lines and accessions to Meloidogyne species]Reactions of selected bean pure lines and accessions to Meloidogyne species
Singh, Shree P.Terán Santofimio, HenryGutiérrez, J.A.Pastor Corrales, Marcial A.Schwartz, Howard F.Morales, Francisco José[Registration of A 339, MAR 1, MAR 2, and MAR 3 angular-leaf-spot-and anthracnose-resistant common bean germplasm]Registration of A 339, MAR 1, MAR 2, and MAR 3 angular-leaf-spot-and anthracnose-resistant common bean germplasm

A total of 20,144 common bean (Phaseolus vulgaris) accessions were evaluated in the field at CIAT-Popayan, Colombia, with a mixture of local isolates of the anthracnose pathogen, Colletotrichum lindemuthianum. Of these, 4,939 (24.5%) accessions were resistant, and another 4,410(2l .9%) showed an ...


Pastor Corrales, Marcial A.Otoya, María MercedesMolina Castaneda, A[Resistance to Colletotrichum lindemuthianum isolates from middle America and Andean South America in different common bean races]Resistance to Colletotrichum lindemuthianum isolates from middle America and Andean South America in different common bean races
Silva, L.O. daMoraes, E.A. deAidar, HThung, Michael D.Gutiérrez, J.A.Terán Santofimio, HenryMorales, Francisco JoséPastor Corrales, Marcial A.Schwartz, Howard F.Singh, Shree P.[Registration of 'EMGOPA 201-ouro' common bean]Registration of 'EMGOPA 201-ouro' common bean

More than 60 accessions of tepary bean (Phaseolus acutifolius) and five cultivars of common bean (P. vulgaris) were evaluated for disease reactions to different races of wilt-causing Fusarium (F. oxysporum f. sp. phaseoli) under glasshouse conditions; 95% of the tepary accessions were resistant. ...


Salgado, MOSchwartz, Howard F.Brick, Mark A.Pastor Corrales, Marcial A.[Resistance to Fusarium oxysporum f. sp. phaseoli in tepary beans (Phaseolus acutifolius)]Resistance to Fusarium oxysporum f. sp. phaseoli in tepary beans (Phaseolus acutifolius)

A survey of root-knot nematodes associated with bean (Phaseolus vulgaris) roots and soils in the major bean production regions of Colombia and Peru was conducted during 1988 1989. Over 150 samples were processed for these parasites, and specimens from more than 100 of the collections were identif...


Mullin, BAAbawi, G.S.Pastor Corrales, Marcial A.Kornegay, Julia L.[Root-knot nematodes associated with beans in Colombia and Peru and related yield loss]Root-knot nematodes associated with beans in Colombia and Peru and related yield loss

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