First Report of Powdery Mildew Caused by Erysiphe quercicola on Hevea brasiliensis in Viet Nam

Molecular identification of the powdery mildew fungus infecting rubber trees in China

“…Fresh diseased leaves were collected and gently pressed onto bronze phase leaves of 2-year-old mildly susceptible cultivar Reyan 7-33-97 rubber trees (Tam, Cuong, et al, 2016). The disease process was observed, and the symptoms on the inoculated leaves were compared to that on the naturally infected leaves.…”

“…). andTam, Cuong, et al (2016) classified rubber tree powdery mildew fungi from Brazil, Thailand and Malaysia, Vietnam to E. quercicola Liyanage et al (2017). These differences may be related to longterm survival and evolution at different geographical locations and under different climatic conditions Limkaisang et al (2005).…”

“…However, this name is still subject to controversy. Tam, Cuong, et al (2016) reported that rubber tree powdery mildew fungus in Vietnam belongs to E. quercicola. The rubber tree powdery mildew fungi in Sri Lanka have been classified into E. quercicola, Golovinomyces, Podosphaera or O. heveae (Liyanage et al, 2017).…”

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“…Percentage BS support values (1K replications; >50 %) are shown on branches. 28S rDNA sequences of powdery mildew on mango (Mangifera indica) determined in this study are shown in boldface along with the ones on mandarine (Citrus reticulate) and para-rubber tree (Hevea brasiliensis) which were defined in Vietnam in previous reports respectively by Tam et al [13,14].…”

“…In addition; it is necessary to carry out surveys of regions where little is known about powdery mildews with the object of publishing local checklists; host ranges and distribution data. Moreover; molecular techniques should be improved to prove the identity of anamorphic states; above all in case of new introductions and in regions such as the tropics and subtropics where they often have little inclination to form the teleomorph [10][11][12][13][14][15].…”