TY - JOUR T1 - Phytophthora Crown and Root Rot Disease of Peach TT - بیماری پوسیدگی فیتوفترایی طوقه و ریشه هلو JF - yu-pps JO - yu-pps VL - 1 IS - 2 UR - http://yujs.yu.ac.ir/pps/article-1-42-en.html Y1 - 2012 SP - 46 EP - 52 KW - Disease KW - Rot KW - Crown KW - Peach KW - Phytophthora N2 - Root and crown rot is an important disease in Kohgiluyeh and Boyerahmad province peach orchards. Its signs are wilting, general weakness, loss of foliage and sometimes sudden wilt and death of the tree. To isolate the pathogen, used corn meal-agar with antibiotics, Delvasid, Ampicillin and rifampicin medium. Pathogen is Phytophthora cactorum. For pathogenesis test, 2 inoculation methods, to a tree branch or contaminated soil around the roots and crown of seedling is used. Inoculation roots and crowns of seedlings and saplings of six varieties of peaches with this pathogen, showed that Takheh is resistant, Alberta, Redhoon and Mashhad red peach are semi-resistant, Angiri and J.H.Hill are sensitive to the disease M3 ER -