The oomycete pathogens Pythium porphyrae, causing red rot disease, and Olpidiopsis spp. Olpidiopsis-blight, cause serious economic losses to Pyropia sea farms in Korea. During the washing step for processing, these proliferate rapidly, significantly reducing quality of final product. To develop non-acidic treatments pathogens, various calcium salts were tested against infectivity P. porphyrae p...

Abstract Background Apple decline diseases, responsible for seedlings root and collar rot in nurseries, are an important disease. Different fungal bacterial antagonists were evaluated to control Pythium ultimum associated with this serious disease using vitro vivo greenhouse assays. Results The test of ten Aspergillus spp. Trichoderma harzianum isolates showed their efficacy reduce the radial g...

There is increasing evidence that microbial volatiles (VOCs) play an important role in natural suppression of soil-borne diseases, but little is known on the factors that influence production of suppressing VOCs. In the current study we examined whether a stress-induced change in soil microbial community composition would affect the production by soils of VOCs suppressing the plant-pathogenic o...

Leaf composts were studied for their suppressive effects on Pythium ultimum sporangium germination, cottonseed colonization, and the severity of Pythium damping-off of cotton. A focus of the work was to assess the role of fatty-acid-metabolizing microbial communities in disease suppression. Suppressiveness was expressed within the first few hours of seed germination as revealed by reduced P. ul...

Fungal phytopathogens are cause of many plant diseases and much loss of crop yields, especially in tropical and subtropical regions. Chemical fungicides are extensively used in agriculture. However, these products may cause problems such as environmental pollution and affect human health. Microorganisms as biocontrol agents have high potential to control plant pathogens and no effect on the env...

An ozonization system (Ozomax OZO 6VTT, IGT limited, Ontario, Canada) was installed in a commercial plastic-covered greenhouse in Danville, Quebec, Canada (www.savoura.com) to study the effects of the disinfection and recirculation of the nutrient solution in a tomato crop. The ozonization system was compared to a conventional growing system where the nutrient solution was not treated, neither ...

Root exudates play a significant role in influencing the rhizosphere microbes. Fungi are an important group of microbes that influenced by plant root exudates. As invasive alien species secretes several allelochemicals and impact soil microbes, this study compared fungal community one weeds Ageratina adenophora with native (Rubus ellipticus, Shorea robusta Imperata cylindrica) far-western Nepal...