نتایج جستجو برای: damping off

تعداد نتایج: 206245  

Journal: :Phytopathology 2007
Charles R Howell

ABSTRACT Good quality seeds of cotton cultivars often escaped pre-emergence damping-off incited by Pythium spp. and Rhizopus oryzae, and they were resistant to postemergence damping-off incited by Rhizoctonia solani. Poor quality seeds, however, were highly susceptible to both phases of seedling disease and required seed treatment in order to survive. Pre-emergence damping-off incited by Pythiu...

Journal: :به زراعی کشاورزی 0
حسین نستری نصرآبادی دانشجوی کارشناسی ارشد گروه علوم باغبانی، دانشکده کشاورزی، دانشگاه فردوسی مشهد، مشهد - ایران حسین نعمتی استادیار گروه علوم باغبانی، دانشکده کشاورزی، دانشگاه فردوسی مشهد، مشهد - ایران علی رضا سبحانی استادیار مرکز تحقیقات کشاورزی و منابع طبیعی خراسان رضوی، مشهد - ایران حسین آرویی استادیار گروه علوم باغبانی، دانشکده کشاورزی، دانشگاه فردوسی مشهد، مشهد - ایران

using mulch to decrease and optimize water use, increase yield and fruit quality is known as a practical method. for this purpose, a split-factorial experiment based on complete block design with three replications on two melon cultivars was conducted in torbat-e-jam, iran. interval irrigation treatments in three levels (six, eight and 10 days) were considered as main plot and mulch (rice straw...

Journal: :چغندرقند 0
سامان سلطانی نژاد دانشجوی کارشناسی ارشد بیماری شناسی گیاهی دانشکده کشاورزی دانشگاه شهید چمران سید باقر محمودی استادیار مؤسسه تحقیقات چغندر قند رضا فرخی نژاد استاد دانشکده کشاورزی دانشگاه شهید چمران

during 2001-2005, 79 isolates of rhizoctonia from seed rot, seedling damping –off, root rot and dry rot canker of sugar beet were collected. based on morphological characteristics, number of nuclei per cell and hyphal diameter, isolates were classified in two groups, binucleate (4 isolates) and multinucleate (75 isolates). among 75 multinucleate isolates ,27 isolates were identified as  ag4, 28...

2017
T Humbert C Josserand Cyril Touzé Olivier Cadot T. Humbert C. Josserand C. Touzé O. Cadot

Thin plates vibrating at large amplitudes may exhibit a strongly nonlinear regime that has to be studied within the framework of wave turbulence. Experimental studies have revealed the importance of the damping on the spectra of wave turbulence, which precludes for a direct comparison with the theoretical results, that assumes a Hamiltonian dynamics. A phenomenological model is here introduced ...

2008
Yan Wei Jiang Siming Liu Vahé Petrosian Christopher L. Fryer

With the diffusion approximation, we study the cascade and damping of Alfvén-cyclotron fluctuations in solar plasmas numerically. Motivated by wavewave couplings and nonlinear effects, we test several forms of the diffusion tensor. For a general locally anisotropic and inhomogeneous diffusion tensor in the wave vector space, the turbulence spectrum in the inertial range can be fitted with power...

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