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First detection of Hollyhock leaf curl virus in Malvastrum coromandelianum in Pakistan.

Zia-Ur-Rehman, M. ; Iqbal, M. J. ; Hameed, U. ; Haider, M. S.

Plant Disease 2018 Vol 102 No. 1 pp. 256;

Abstract

Due to the importance of weed hosts in the epidemiology and evolution of begomoviruses, a widespread weed, Malvastrum coromandelianum, exhibiting leaf curl symptoms reminiscent of those caused by begomoviruses (Geminiviridae) were evaluated in Lahore, Pakistan, during 2012. Three symptomatic leaf samples were collected from different fields infested with the whitefly Bemisia tabaci. The presence of Hollyhock leaf crumple virus (HoLCV) was detected along with Kenaf leaf curl betasatellite (KLCuB) and Hollyhock leaf curl alphasatellite (HoLCA) based on various molecular analyses. This is thought to be the first report of HoLCV, KLCuB and HoLCA from M. coromandelianum showing that the weed harbours this disease complex and may act as a reservoir of these viruses, posing threat to vegetable and crop production in the area.