نتایج جستجو برای: podosphaera pannosa on rosa sp

تعداد نتایج: 8489156  

2000
C. Rommens D. Laurier A. Merle-Szeremeta C. Drombry-Ringeard A. Sugier

1 Estimation of the Risk of Radiation-induced Leukaemia among Young People in the Vicinity of the La Hague Reprocessing Plant : Results from the Nord-Cotentin Radioecological Study C. Rommens, D. Laurier, A. Merle-Szeremeta, C. Drombry-Ringeard and A. Sugier Institute for Protection and Nuclear Safety, IPSN, B.P. 6, F-92265 Fontenay-aux-Roses, France Hémisphères, 18/20, av. E. Herriot, Bâtiment...

Journal: :Journal of nematology 1988
B A Mullin B B Brodie

The fecundity of Globodera rostochiensis (RA) females that developed on resistant Rosa and susceptible Katahdin potato cultivars were compared. Cysts collected from each cultivar were bulked, separated into four sizes (> 500 mum, 355-500 mum, 250-355 mum, and < 250 mum), and crushed to determine fecundity as measured by viable egg content (VEC). Fewer and generally smaller cysts developed on Ro...

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه یاسوج - دانشکده کشاورزی 1391

سفیدک های پودری قارچ های انگل اجباری هستند که خسارت شدیدی به گیاهان وارد می آورند. به منظور شناسایی این قارچ ها در استان کهگیلویه و بویراحمد، از گیاهان بیمار در مناطق مختلف این استان نمونه برداری گردید. با مطالعه ی کنیدیوم ها، کنیدیوم برها، آسکوکارپ، آسک ها و آسکوسپورهای این قارچ ها و با استفاده از کلید معتبر شناسایی گونه های این قارچ ها، 20 گونه سفیدک پودری متعلق به 6 جنس blumeria، erysiphe،...

حاتمی, بیژن , قهاری, حسن ,

The difficulties of control of greenhouse whitefly on crops and greenhouse plants make extensive studies and investigations necessary in different areas of Iran. Morphological and biological studies were carried out on a prevailing species of greenhouse whitefly, Trialeurodes vaporariorum Westwood, in Isfahan. In this study, six species of whiteflies T. vaporariorum on Althaea sp. and Lantana c...

2018
Zhuo Zhang Luyun Luo Xinqiu Tan Xiao Kong Jianguo Yang Duanhua Wang Deyong Zhang Decai Jin Yong Liu

Phyllosphere microbiota play a crucial role in plant-environment interactions and their microbial community and function are influenced by biotic and abiotic factors. However, there is little research on how pathogens affect the microbial community of phyllosphere fungi. In this study, we collected 16 pumpkin (Cucurbita moschata) leaf samples which exhibited powdery mildew disease, with a sever...

Journal: :Journal of nematology 1980
M G Bookbinder J R Bloom

Uromyces phaseoli, the causal agent of bean rust, suppressed shoot and root growth of three bean cultivars, reducing root weight more than shoot weight. The greatest suppression of root weight was on the cultivar that appeared most susceptible by visual ratings of shoot symptoms. Meloidogyne incognita suppressed shoot and root growth of all test cultivars; root weight reductions differed among ...

Journal: :Phytopathology 2008
D H Gent W W Turechek W F Mahaffee

The incidence of hop powdery mildew on leaves, caused by Podosphaera macularis, collected from 1,606 transects in 77 commercial hop yards in Oregon and Washington over 9 years was used to assess variability in heterogeneity of disease and the estimated binary power law parameters. Spatial analyses of data sets were conducted at the level of individual rows (row level) and multiple rows within a...

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