Genetic variability in Brazilian castor (Ricinus communis) germplasm assessed by morphoagronomic traits and gray mold reaction.

The characterization and conservation of castor accessions in germplasm bank are essential in order to breeding programs achieve its goals. Despite Brazil having the 4th largest castor germplasm bank in the world, castor diversity in Brazil remains little explored. Thus, this study aimed at characterize castor accessions collected in different Brazilian regions by means of 31 morphoagronomic traits and gray mold reaction.

Claviradulomyces, a new genus of Odontotremataceae from West African rainforest.

A new genus, Claviradulomyces, morphologically typical of Odontotremataceae, is proposed to accommodate the new species Claviradulomyces dabeicola. The genus is characterised by its ornamented periphysoids, and long-cylindric, sigmoid, acuminate ascospores. Genetically, C.

Additions to the mycobiota of the invasive weed Miconia calvescens (Melastomataceae).

Miconia calvescens (Melastomataceae) is a shrub or small tree native to the Neotropics that has become one of the worst invaders of forest ecosystems, particularly in Pacific islands such as Hawaii and French Polynesia. It has been a target for biological control for more than 10 y, both with arthropod and pathogen natural enemies. Until now Colletotrichum gloeosporioides f.

Calidion bombacis, a new combination for Uredo bombacis with the record of Bombacopsis glabra (Bombacaceae) as a new host from Brazil.

The new combination Calidion bombacis is proposed for the rust species formerly known as Uredo bombacis. This nomenclatural change is based on the examination of newly collected material of this fungus from a new host, Bombacopsis glabra from Brazil, and reexamination of the isotype. Until now this fungus was only known to occur in Asia (China, India and Sri Lanka).

Description of the life-cycle of the pearl millet rust fungus--Puccinia substriata var. penicillariae with a proposal of reducing var. indica to a synonym.

Pearl millet (Pennisetum glaucum) is a major staple food crop in the drier parts of the old world, like Africa and India. Recently, its cultivation became more widespread in no-tillage crop farming systems in central Brazil, but it is also being used for cultivation during the dry season in other areas in Brazil. An emerging problem for the wider adoption of this crop in Brazil is the damage caused by the rust Puccinia substriata.