Davi Mesquita de Macedo

Universidade Federal de Viçosa (UFV) | UFV · Departamento de Fitopatologia

Perisporiopsidaceae includes species with superficial ascomata seated on a subiculum, and ellipsoidal oblong, one or more septate, hyaline ascospores. Taxonomy of species in this family has been based, mainly, on morphological characters and host/substrate associations. There is limited information about the taxonomic placement of Perisporiopsidace...

During surveys conducted in South America and Africa to identify natural fungal enemies of coffee leaf rust (CLR), Hemileia vastatrix, over 1500 strains were isolated, either as endophytes from healthy tissues of Coffea species or as mycoparasites growing on rust pustules. Based on morphological data, eight isolates—three isolated from wild or semi...

An amendment to this paper has been published and can be accessed via a link at the top of the paper.

A survey for species of the genus Trichoderma occurring as endophytes of Coffea, and as mycoparasites of coffee rusts (Hemileia), was undertaken in Africa; concentrating on Cameroon and Ethiopia. Ninety-four isolates of Trichoderma were obtained during this study: 76 as endophytes of healthy leaves, stems and berries and, 18 directly from colonized...

Mimosa caesalpiniifolia: Fabaceae (sansão‐do‐campo or sabiá, in Brazil) is a small tree or shrub native to the Brazilian semi‐arid forest and widely used as a hedge plant in Brazil. Although of economic relevance, little is known of fungal pathogens infecting this plant. Recently, plants growing in an urban situation at Ouro Preto, and also on the...

Novel species of fungi described in this study include those from various countries as follows: Antarctica: Cadophora antarctica from soil. Australia: Alfaria dandenongensis on Cyperaceae, Amphosoma persooniae on Persoonia sp., Anungitea nullicana on Eucalyptus sp., Bagadiella eucalypti on Eucalyptus globulus, Castanediella eucalyptigena on Eucalyp...

Dracaena braunii (lucky bamboo) is a plant of West Africa widely used as an ornamental. Recently individuals bearing anthracnose symptoms were found in Viçosa (state of Minas Gerais, Brazil). Morphology was typical of Colletotrichum dracaenophilum and sequence analyses indicated a high homology to the internal transcribed spacer region and Beta tub...

Pueraria phaseoloides (tropical kudzu) is a plant native from Southeast Asia, which is widely used in pastures. In 2014 individual plants with leaf spots were found in Viçosa (State of Minas Gerais, Brazil). Morphology of the causal fungus was typical of Corynespora cassiicola. ITS sequence analysis indicated a high homology with other sequences av...

Tradescantia fluminensis [Commelinaceae] (common name wandering Jew or trad), is a native Brazilian herbaceous plant, which has been introduced to be used as an ornamental in many warm areas of the world. In New Zealand and other countries it has become an aggressive invader of natural ecosystems, causing serious environmental disturbances and thre...

Rottboellia cochinchinensis (Lour.) W.D. Clayton, known as itchgrass, is an annual grass that is native to Asia and Africa. It is a serious weed problem, particularly of graminaceous crops (Holm et al. 1977). It was recently introduced to Brazil and is increasing in importance, particularly in sugarcane plantations (Freitas et al. 2004). During 200...

Background South American leaf blight (SALB) of rubber has been the main constraint to production in its neotropical centre of origin since commercial plantations were first established. The fungal causal agent was identified and described more than a century ago but its precise placement within the Ascomycota still remains uncertain. Indeed, such...

Sinapis alba (Brassicaceae), white mustard, is broadly cultivated for its seed used as component of table mustard (4). In June 2013, a group of diseased S. alba were observed in a vegetable garden on the campus of the Universidade Federal de Viçosa (municipality of Viçosa, state of Minas Gerais, Brazil). Foliage of diseased plants showed numerous c...

Lonicera japonica (Japanese honeysuckle), a plant of Asian origin introduced as an ornamental into many countries, has become an invasive weed in some exotic situations, such as in southern Brazil. Classical biological control (CBC) with natural enemies collected in the centre of origin is considered to be the best alternative for sustainable manag...

Acalypha wilkesiana (Euphorbiaceae), common names copperleaf or Jacob's coat (in Brazil, crista-de-peru), is a popular ornamental native from the Pacific islands. It is widely used in gardens in Brazil (4). In January 2012, a group of diseased A. wilkesiana was found in a nursery at the municipality of Itaboraí (state of Rio de Janeiro, Brazil). La...

Mesquita de Macedo, D., Pereira, O. L., Wheeler, G. S., and Barret, R. W. 2013. Corynespora cassiicola f. sp. schinii, a potential biocontrol agent for the weed Schinus terebinthifolius in the United States. Plant Dis. 97:496-500. Schinus terebinthifolius (Anacardiaceae), Brazilian peppertree (BP), is a major environmental weed in many tropical and...

Acca sellowiana (Myrtaceae), feijoa (in Brazil, goiaba da serra), is a native southern South America tree that produces edible fruits which, although only occasionally cultivated in South America, became a significant fruit crop in New Zealand. Recently, during surveys for fungal pathogens of feijoa in southern Brazil, several plants were found bea...

Meliola chilensis, M. rhois var. africana, and Irenopsis schini-terebinthifolii sp. nov. are described from the leaves of Schinus terebinthifolius (Anacardiaceae). Illustrations and a key to all Meliolaceae known to associate with species belonging to the genus Schinus are provided.

Pseudocercospora clerodendricola sp. nov. is described herein. The fungus was found causing leaf spots in Clerodendrum x speciosum (bleeding heart) and its pathogenicity was demonstrated. Inoculation with culture discs placed on healthy leaves resulted in typical leaf spots appearing 30 days after inoculation.

Corynespora cassiicola f. sp. schinii , um novo patótipo identificado no Brasil com potencial para o uso no controle biológico de aroeira ( Schinus terebinthifolius analysis has shown that this fungus belongs to Corynespora cassiicola . A host-range test involving 22 species, including 8 species in the Anacardiaceae, besides S. terebinthifolius has...

Impatiens walleriana, busy lizzy or balsam (local names in Brazil maria-sem-vergonha or beijo-de-frade), is an African member of the Balsaminaceae that has long ago been introduced and established in Brazil. It is now widely cultivated commercially as a potted plant and a popular garden plant (3). It also is a common weed along the coast and is par...

Botrytis cinerea is recorded for the first time causing gray mold on Clerodendron splendens in Brazil; flower blight and leaf spots were observed as a result of attack by the pathogen.

The new species Cercospora neomaricae was found causing leaf spot on Neomarica caerulea (walking iris or apostle plant) and is described. Pathogenicity to N. caerulea was also demonstrated. Additional keywordscercosporoid–íris-roxo–ornamental plant–plant-pathogenic fungi

A leaf spot disease was observed attacking some Magnolia aff. candollei plants grown in a private garden in the city of Rio de Janeiro, RJ, Brazil. Such leaf spots coalesced and led to extensive blight of foliage. A fungus was clearly associated to the disease symptoms and was identified as Botryosphaeria ribis. Its anamorph, Fusicoccum ribis, was...

A leaf spot disease was observed attacking some Magnolia aff. candollei plants grown in a private garden in the city of Rio de Janeiro, RJ, Brazil. Such leaf spots coalesced and led to extensive blight of foliage. A fungus was clearly associated to the disease symptoms and was identified as Botryosphaeria ribis. Its anamorph, Fusicoccum ribis, was...

These proceedings contain the full-length papers and abstracts of papers presented at the symposium. Subjects covered include: ecology and modelling in biological control of weeds; benefits, risks and cost analysis of biological weed control; target and biological control agent selection; pre-release specificity and efficacy testing; regulations an...

Isolou-se uma bactéria incitadora de podridão-mole em batata e procurou-se identificá-la em nível de espécie. Testes biológicos, bioquímicos e tintoriais permitiram posicionar o microrganismo em questão com pertencente à espécie Pseudomonas viridiflava. Procurou-se também investigar a suscetibilidade de diferentes órgãos de reserva de distintas esp...

Duosporium yamadanum (Matsuura) Tsuda & Ueyama is a pathogenic fungus that attacks purple nutsedge, Cyperus rotundus, L. in Brazil. Occasionally, it is found causing severe natural epiphytot-ics of leaf blight on that host in the field. Exploratory studies have already indicated that this fungus has potential for the development of a mycoherbicide....