%0 Conference Proceedings %T classification and genetic variability of rhizoctonia isolates associatied with sugar beet in Iran %A -, - %A Falah Rastegar, Mahrokh %A Jafarpour, Behrooz %A Rouhani, Hamid %A Mahdikhani Moghadam, Esmat %J 61th international symposium oon crop protection %D 2009