Powdery mildew of Ruta graveolens in Brazil caused by Oidiopsis haplophylli

Summa Phytopathologica

José Ricardo Liberato¹  Robert Weingart Barreto¹ 

[1] ,Universidade Federal de Viçosa Departamento de Fitopatologia Viçosa MG

关键词: Erysiphaceae;    Phyllactinioideae;    rue;    Leveillula taurica;    Erysiphaceae;    Phyllactinioideae;    arruda;    Leveillula taurica;   

DOI  :  10.1590/S0100-54052006000100012

来源: SciELO

【 摘 要 】

Oidiopsis haplophylli is described causing powdery mildew on Ruta graveolens for the first time in Brazil (Viçosa, MG). The fungus causes yellowing of infected leaves accompanied by the presence of a whitish mycelial colony abaxially. The following combination of characters typical of this species was observed on the specimens collected in Viçosa: mycelium hypophyllous, hemiendophytic (partly external and partly internal), entering the leaves through the stomata; conidiophores hypophyllous, produced from the internal mycelium emerging through the stomata, cylindrical, hyaline, smooth; conidia, isolate, dimorphic - primary conidia lanceolate, 66.5-91.5 x 11.0-20.0 mm l/w ratio 3.5-6.2, secondary conidia cylindrical with rounded ends, 57.0-81.5 x 13.5-20.0 mm, l/w ratio 3.1 - 5.3, aseptate, hyaline, smooth.

【 授权许可】

CC BY   
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