Testing of Eight Medicinal Plant Extracts in Combination with Kresoxim-Methyl for Integrated Control of Botrytis cinerea in Apples

Agriculture

Burtram C. Fielding¹  Cindy-Lee Knowles³  Filicity A. Vries²  Jeremy A. Klaasen³ 

[1] Molecular Biology and Virology Laboratory, Department of Medical BioSciences, Faculty of Natural Sciences, University of the Western Cape, Bellville 7535, South Africa; E-Mail:;Fruit, Vine and Wine Institute of the Agricultural Research Council, ARC Infruitec-Nietvoorbij, Private Bag X5026, Stellenbosch 7599, South Africa; E-Mail:;Plant Pathology Laboratory, Department of Medical BioSciences, Faculty of Natural Sciences, University of the Western Cape, Bellville 7535, South Africa; E-Mail:

关键词: Botrytis cinerea;    gray mold;    kresoxim-methyl;    medicinal plants;    plant extracts;    strobilurin;    fungicides;   

DOI  :  10.3390/agriculture5030400

来源: mdpi

【 摘 要 】

Botrytis cinerea is a fungus that causes gray mold on many fruit crops. Despite the availability of a large number of botryticides, the chemical control of gray mold has been hindered by the emergence of resistant strains. In this paper, tests were done to determine the botryticidal efficacy of selected plant extracts alone or combined with kresoxim-methyl. In total, eight South African medicinal plants viz Artemisia afra, Elyptropappus rhinocerotis, Galenia africana, Hypoxis hemerocallidea, Siphonochilus aetheopicus, Sutherlandia frutescens, Tulbaghia violacea andTulbaghia alliacea were screened. Allium sativum, a plant species known to have antifungal activity, was included in the in vivo studies. For the in vitro studies, synergistic interactions between the plant extracts and the kresoxim-methyl fungicide were tested with radial growth assays. Data indicated synergistic inhibitory effects between the fungicide and the plant extracts. Next, different doses of plant extracts combined with kresoxim-methyl were used for decay inhibition studies on Granny Smith apples. Synergistic and additive effects were observed for many of the combinations. Even though this study was done using only one strain of B. cinerea, results showed that the tested indigenous South African plant species possess natural compounds that potentiate the activity of kresoxim-methyl.

【 授权许可】

CC BY   
© 2015 by the authors; licensee MDPI, Basel, Switzerland.