African Journal of
Agricultural Research

  • Abbreviation: Afr. J. Agric. Res.
  • Language: English
  • ISSN: 1991-637X
  • DOI: 10.5897/AJAR
  • Start Year: 2006
  • Published Articles: 6576

Full Length Research Paper

Evaluation of different grape varieties for resistance to powdery mildew caused by Uncinula necator

  Hossein Karbalaei Khiavi1*, Haji Shikhlinskiy2, Asadollah Babaei Ahari3 and Mohammad Akrami4
  1Agriculture and Natural Resources Research Center of Ardebil Province, Ardebil, Iran. 2Azerbaijan National Academy of Sciences, Baku, Azerbaijan. 3Department of Plant Protection, College of Agriculture, University of Tabriz, Tabriz, Iran. 4University of Payam Noor, Tabriz, Iran.
Email: [email protected]

  •  Accepted: 27 June 2012
  •  Published: 31 July 2012

Abstract

 

Powdery mildew is one of the most serious and destructive diseases of grapes around the world, including Iran. Although the application of chemical pesticides is the most common control method, the use of resistant varieties may be the most effective and environmentally sound strategy for managing the disease. Fourteen grape varieties were evaluated for testing powdery mildew (Uncinula necator) resistance under natural infection conditions and artificial inoculation methods were used between 2007 and 2009 in Ardabil province of Iran. Disease severity on leaves and fruit (cluster) were evaluated by the following procedures: 0: immune, 1: highly resistant, 2: resistant, 3: tolerant, 4: susceptible, and 5: highly susceptible. Results of the experiments showed that Shahani, Yagothi and Tabrizkishmishi cultivars were immune, Sahibi cultivar was highly resistant, Agshilig and Tokoulgan were resistant, Kishmishi, Khalili and Tabarzeh cultivars were tolerant, Aldarag and Koupakbogan were susceptible and Garashilig, Seyrakpousteh and Rasmi cultivars were highly susceptible to the disease. In general, results of this study were promising and some immune, highly resistant and resistant cultivars to U. necator were identified and they may be used as a resistance genetic source for management of the disease in national and international programs.

 

Key words: Grape, Uncinula necator, powdery mildew, resistance.