Abstract
Rosa indica L. (family: Rosaceae) is an important and widely grown plant in the
floriculture industry. Alternaria leaf spot disease of rose was observed in rose plantation
at College of Agriculture, University of Sargodha, Sargodha. The study was carried out
to isolate and purify the pathogen, which was identified as Alternaria alternata.
Additionally, in vitro efficacy of five fungicides; success, copper oxychloride,
metalaxyl+mancozeb, topsin M and kumulus against A. alternata were tested by using
food poisoning technique. Three concentrations (100, 200 and 300 ppm) of each
fungicide were used. Mycelial growth after 3rd, 5th and 7th day was measured. All the
fungicides significantly inhibited the mycelial growth of A. alternata. Among those,
metalaxyl+mancozeb was the most effective as compared to others. Maximum
inhibition was observed after 3rd (89%), 5th (91.6%)
Muhammad Asim, Yasir Iftikhar, Muhammad Arshad, Sonum Bashir, Faheema Bakhtawar, Saqib Bilal. (2019) Inhibitory effect of various fungicides on mycelial growth of Alternaria alternata; cause of Alternaria leaf spot disease on Rosa Indica L. in Pakistan, Asian Journal of Agriculture and Biology, Volume 7, Issue 3.
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