EVALUATION SAINFOIN POPULATIONS IN REACTION TO POWDER MILDEW DISEASE IN DIFFERENT CLIMATE CONDITIONS OF IRAN
MOHAMMAD ALI ALIZADEH *1 AND ALI ASHRAF JAFARI 2
Research Institute of Forest and Rangelands, Tehran, Iran
* corresponding author: E- mail: Alizadeh202003@gmail.com
Agricultural and Natural resources research center of Zanjan, Lurestan and Esfahan province
In order to evaluation of the sainfoin populations, to powder mildew disease in different climate conditions, 40 populations were cultivated in the research stations including: Zanjan (Zanjan province) Semirom (Esfahan province), , Khoramabad (Lourestanprovince), Tabriz (East Azarbyjan), and Sanandaj (Kordestan province). The infected plants were selected and the fungi of Leveillula taurica was identified as agent of powder mildew disease. Result of disease severity index on the populations with natural infection showed that all populations had different degree disease severity index. Combined analysis of variance over locations showed that there were significant differences between locations, populations, populations x locations interaction effects for disease severity index , disease percentage rate and forage yield. Mean comparison of populations showed that disease severity index of two populations including: Poly cross and Oshnavieh were as 0 to 25% and both of them were considered as tolerant populations to powder mildew disease.
Key words: Powder mildew disease, Sainfoin , disease severity index