نوع مقاله : مقاله پژوهشی
نویسندگان
1 مرکز تحقیقات کشاورزی و منابع طبیعی استان خراسان، مشهد، صندوق پستی 1148-91735
2 کارشناس مرکز تحقیقات کشاورزی و منابع طبیعی استان خراسان، مشهد، صندوق پستی 1148-91735
چکیده
کلیدواژهها
عنوان مقاله [English]
نویسندگان [English]
Powdery mildew has been accounted as the most important disease of Saxaoul plant species (Haloxylon spp.) in Khorassan Province and the other parts of Iran as well. Leveillula saxaouli (Sorok) Golovin has been determined as the causal agent of the disease. In this study, canied out in 1997, variations of conidia population during infection seasons, morphometeric variations of the fungus, infection rate of the disease as well as host range and histopathologic relation of host-pathogen were investigated. The results did not show any morphological differences between the fungus isolates collected from various areas. The highest number of conidia of L. saxaouli trapped on the microscopic slide placed near infected leaves of Saxaoul during 1998-1999 were 125.79 and 51.5 in square centimeter of the slide in early July for Gonabad and Sabzavar areas, respectively. Meanwhile, the lowest rate for these localities were 0.54 and 0.74 in late November. Rate of infection were 22.37%o and l4Yo in Sabzevar and Gonabad, respectivly.
کلیدواژهها [English]
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