Plant pathogenic fungi in eight genera produce light-activated perylenequinone toxins that are toxic to plants via the generation of activated oxygen species, particularly singlet oxygen. Studies on the cercosporin toxin produced by Cercospora species have documented an important role for this toxin in pathogenesis of host plants. Cercosporin-generated active oxygen species destroy the membrane...

The third part of a series of monographic treatments of cercosporoid fungi (formerly Cercospora s. lat., Mycosphaerellaceae, Ascomycota) continues with a treatment of taxa on monocots (Liliopsida; Equisetopsida, Magnoliidae, Lilianae), covering asexual and holomorph species with mycosphaerella-like sexual morphs on true grasses (Poaceae), which were excluded from the second part. The species co...

Leaf spot symptoms were frequently observed on yam plants grown in the Yeoju area in Korea during a disease survey in 2008. A total of five isolates of Pseudophloeosporella sp. were obtained from the infected leaves of yam plants. All of the isolates were identified as Pseudophloeosporella dioscoreae based on their morphological and cultural characteristics. A phylogenetic tree derived from the...

Introducción. El tizón foliar por Cercospora y la mancha púrpura de semilla son enfermedades endémicas soja en Argentina. Objetivo. Evaluar prevalencia, incidencia severidad del Argentina durante dos años consecutivos, 2015 2016. Materiales métodos. Los muestreos se realizaron sobre un total 132 lotes. La evaluación campo etapa reproductiva R6. análisis prevalencia e realizó laboratorio. Result...

Fitopatógenos interferem de forma negativa na produção e qualidade final dos produtos agrícolas comercializados. O trabalho tem como objetivo verificar o controle alternativo fungos Cercospora beticola sacc, Phytophthora infestans Colletotrichum lindemuthianum, utilizando as doses 0,2; 0,4; 0,6; 0,8 µL mL-1 do óleo essencial guaçatonga, em comparação a testemunha com somente água. Avaliou- se i...

A simple synthetic liquid medium containing a single amino acid, glucose, salts, trace metals, and thiamine was developed for cultivation of Cercospora rosicola Passerini. Thiamine was shown to be important to growth. Culture of C. rosicola Passerini in a chemically defined medium makes possible studies of (+)-abscisic acid biosynthesis and regulation.

Genotyping-by-sequencing (GBS) was conducted on 333 Cercospora isolates collected from Beta vulgaris (sugar beet, table beet and swiss chard) in the USA and Europe. Cercospora beticola was confirmed as the species predominantly isolated from leaves with Cercospora leaf spot (CLS) symptoms. However, C. cf. flagellaris also was detected at a frequency of 3% in two table beet fields in New York. R...

A new Cercospora species, namely, C. neriicola Ershad on Nerium oleandercollected in Iran was described and illustrated. The new species was compared with C. nerii-indici, the other species on Nerium.