The objective of this study was to characterize isolates of biovar 2 of Ralstonia solanacearum pathogenic to eucalyptus "urograndis" hybrid by means of biochemical tests, as well as evaluation of host range and identification by PCR with primers for species, biovar and phylotype. Carbohydrate utilization assays revealed that the eucalyptus isolates belong to phenotype Tropical of biovar 2 (2T). From artificial inoculations it was possible to reproduce symptoms or recover the bacterium from: eucalyptus, potato, tomato, eggplant, datura, geranium, turnip, mustard, nasturtium, beetroot, sunflower, bean, French marigold, horseradish tree, and cashew. The PCR assays confirmed that the isolates belong to biovar 2, phylotype II of the bacterium. The confirmation of new biovar naturally infecting eucalyptus indicates that R. solanacearum easily adapts to new hosts.

Foram estudadas cinco espécies de Uromyces sobre Bauhinia spp. e uma espécie nova em Galactia peduncularis. Uromyces bauhiniae foi encontrada pela primeira vez sobre B. holophylla, onde somente Uromyces floralis havia sido descrita. Uromyces floralis foi estudada sobre B. curvula, hospedeiro inédito no Brasil para esta espécie. Uromyces foveolatus, comum em B. acuruana var. nitida, no cerrado do Mato Grosso e U. goyazensis sobre B. dumosa var. viscidula foram encontradas somente na fase telial em todas as exsicatas examinadas. Uromyces viegasii foi estudada em B. forficata. Uromyces galactiae sp. nov. é o primeiro fungo fitopatogênico associado ao gênero Galactia.

Five Uromyces species were studied on Bauhinia spp. and a new species was described on Galactia peduncularis. Uromyces bauhiniae was found for the first time on Bauhinia holophyla, where only U. floralis had been previously described. Uromyces floralis was studied on B. curvula, inedited host in Brazil for that species. Uromyces foveolatus common in B. acuruana var. nitida in the Cerrado of Mato Grosso and U. goyazensis on B. dumosa var. viscidula were both found only in their teleomorphic phase in all exsicates examined. Uromyces viegasii was studied on B. forficata. Uromyces galactiae sp. nov. is the first plant pathogenic fungus found on the Galactia genus.

Oito espécies de Ravenelia descritas anteriormente foram revisadas e acrescentadas ilustrações inéditas das características morfológicas de alguns desses fungos causadores de ferrugem em Leguminosae. As espécies de Ravenelia estudadas foram: Ravenelia bezerrae sobre Enterolobium ellipticum ; R. densifera sobre Senna silvestris; R. dieteliana sobre Calliandra dysantha. var. dysantha; R. geminipora sobre Platymenia reticulata; R. lonchocarpi sobre Lonchocarpus campestris; R. mimosae-sensitivae sobre Mimosa radula var. imbricata; R. pileolarioides sobre Caesalpinia pyramydales e R. santos-costae, sobre Calliandra dysantha.

Eight previously described species of Ravenelia were reviewed and additional inedited illustrations from the following species were included. Ravenelia bezerrae on Enterolobium ellipticum; R. densifera on Senna silvestris; R. dieteliana on Calliandra dysantha var. dysantha; R. geminipora on Platymenia reticulata; R. lonchocarpi on Lonchocarpus campestris; R. mimosae-sensitivae on Mimosa radula var. imbricata; R. pileolarioides on Caesalpinia pyramydalis and R.. santos-costae on Calliandra dysantha.

Seis espécies de fungos causadores de ferrugem, Diorchidium copaiferae, Ravenelia hieronymi, Sphaerophragmium acaciae, Esalque holway, Uredo sp. e Uromyces neurocarpi foram estudadas e descritas com o acréscimo de detalhes adicionais e correções em suas descrições originais. Várias características morfológicas foram revisadas sendo a maioria delas ilustrada pela primeira vez em microscópio ótico e eletrônico de varredura. As exsicatas foram depositadas na Coleção Micológica de Referência da Universidade de Brasília

Six species of rust fungi Diorchidium copaiferae, Ravenelia hieronymi, Sphaerophragmium acaciae, Esalque holway, Uredo sp. and Uromyces neurocarpi were taxonomically studied. In addition, corrections were made in their original descriptions with morphological characteristics. Most of the species were new and illustrated for the first time in optical and scanning electron microscope. All exsiccates were deposited in the Micological Collection for Refference of the Universidade de Brasília.

Quatro espécies novas de Ravenelia foram descritas em leguminosas do Cerrado brasileiro, a saber: Ravenelia cerradensis sp. nov., R. chapadensis sp. nov., R. mineirosensis sp. nov. e R. emaensis sp. nov. sobre Chamaecrista clausenii var. cyclophylla, Chamaecrista conferta var. virgata, Anadenanthera colubrina var. colubrina e Anadenanthera sp., respectivamente.

Four new Ravenelia species were described on native leguminous hosts from the Brazilian Cerrado, as follows: Ravenelia cerradensis sp. nov., R. chapadensis sp. nov., R. mineirosensis sp. nov. and R. emaensis sp. nov. on Chamaecrista clausenii var. cyclophylla, Chamaecriista conferta var. virgata, Anadenanthera colubrina var. colubrina, and on Anadenanthera sp., respectively.