نتایج جستجو برای: phytophthora melonisو pythium aphanidermatum
تعداد نتایج: 9743 فیلتر نتایج به سال:
This experiment aims at establishing the ability of the endomycorrhizal fungus Glomus intraradices to suppress the plant pathogen Pythium ultimum in cherry tomato. A study published in Canadian Journal of Plant Pathology in 1994 showed that Glomus intraradices suppresses Pythium ultimum in Tagetes patula (french marigold) (St-Arnaud, Fortin, Caron, & Hamel, 1994). Pythium ultimum and other Pyth...
ABSTRACT A series of laboratory tests were conducted to investigate potential effects of fungus gnat (Bradysia impatiens) feeding damage on susceptibility of geranium seedlings (Pelargonium x hortorum) to infection by the root rot pathogen Pythium aphanidermatum. Effects were compared with those from similar tests in which the seedlings were mechanically wounded by severing the root tip with a ...
Burkholderia cepacia AMMDR1 is a biocontrol agent that protects pea and sweet corn seeds from Pythium damping-off in field experiments. The goal of this work was to understand the effect of B. cepacia AMMDR1 on Pythium aphanidermatum and Aphanomyces euteiches zoospore homing events and on infection of pea seeds or roots. In vitro, B. cepacia AMMDR1 caused zoospore lysis, prevented cyst germinat...
The kingdom Stramenopile includes diatoms, brown algae, and oomycetes. Plant pathogenic oomycetes, including Phytophthora, Pythium and downy mildew species, cause devastating diseases on a wide range of host species and have a significant impact on agriculture. Here, we report comparative analyses on the genomes of thirteen straminipilous species, including eleven plant pathogenic oomycetes, to...
Sixteen streams in middle and eastern Tennessee were surveyed for the sudden oak-death pathogen Phytophthora ramorum 2010-2012. Surveys were conducted in the spring and fall using healthy Rhododendron leaves, and a total of 354 oomycete isolates were recovered. Sequence analysis of the ITS region provisionally identified 151 Phytophthora, 200 Pythium, two Halophytophthora and one Phytopythium. ...
ABSTRACT: Methanolic crude extracts of 32 plant species belonging to 21 families collected from the west of Iran were screened for antifungal activity against three economically important phytopathogenic fungi, Phytophthora drechsleri, Pythium aphanidermatum and Rhizoctonia solani. Bioassay of the extracts was conducted by agar diffusion method on agar plate cultures with five replications. Twe...
قارچ های خاکزی هر ساله خسارت های جبران ناپذیری به گلخانه های محصولات جالیزی وارد می کننند که اامیست-های عامل بوته میری جالیز از جمله مهمترین آنها هستند. در این پژوهش برای شناسایی عوامل بیماریزا و تعیین میزان خسارت ناشی از آن گلخانه های متعددی در استان های اصفهان و یزد مورد بازدید قرار گرفت و تقریباً هیچ گلخانه ای بدون آلودگی دیده نشد. میزان خسارت در گلخانه های بازدید شده بین 75-5 در صد تخمین زده...
The ability of the microbial agent Pseudomonas (Ps.) chlororaphis Tx-1 to suppress Pythium aphanidermatum and Pythium dissotocum, and control root rot, was investigated as a function of time of agent application and pathogen inoculation in vegetativestage sweet peppers grown in single-plant hydroponic units. The agent was applied to the nutrient solution at 1 10 CFU/mL and roots were inoculated...
Twenty isolates of bacteria were successfully isolated from rhizosphere soil samples collected from different plant species growing at various locations in North Jeddah, Saudi Arabia to investigate their effects on Cucumis sativus L. cv. Marketmore growth and damping-off disease caused by Pythium aphanidermatum. The results of dual culture method showed that only three isolates out of twenty, w...
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