Tobacco cyst nematode (Globodera tabacum solanacearum) isolates were collected from 11 locations in Virginia, 3 in North Carolina, and 1 in Maryland. Isolates from each location were maintained and increased on flue-cured tobacco, Nicotiana tabacum cv K326. Plants of flue-cured tobacco cultivars K326 (susceptible) and NC567 (resistant) were each inoculated with 6,000 G. t. solanacearum eggs/pla...

sunflower downy mildew, caused by plasmopara halstedii, is one of the most important diseases of this crop in west-azarbaijan, urmia. it causes economic yield losses during favorable environmental conditions. the pathogen is a polycyclic one, and it is likely that physiological changes occur in its population and subsequent appearance of new physiological races. hence, identification of the exi...

The cucumber (Cucumis sativa L.) is often subjected to several fungal diseases. Rhizoctonia solani-induced damping-off and root rot are the most common diseases reported from commercial greenhouses of eastern area Saudi Arabia. objective current study explore antagonistic activity four Trichoderma species against R. solani in vitro vivo. Ten isolates (eight belonging AG-4 two AG-A AG2-1) were s...

We have used a Mediterranean hot spot of biodiversity (the Island of Sardinia) to investigate the impact of abiotic factors on the distribution of species of the common soil fungus Trichoderma. To this end, we isolated 482 strains of Hypocrea/Trichoderma from 15 soils comprising undisturbed and disturbed environments (forest, shrub lands and undisturbed or extensively grazed grass steppes respe...

Trichoderma harzianum is a ubiquitous species in the environment and is effective in the biological control of plant-pathogenic fungi. T. harzianum has not been linked unequivocally to its sexual state nor has its phylogeny been studied in detail. It has been suggested that T. harzianum is a species complex based on the phenotypic and genotypic variability encountered. On the basis of morpholog...

The production of new generation of wood preservatives (without addition of a co-biocide) in combination with an exchange of wood poles on identical sites with high fungal inoculum, has resulted in an increase of premature failures of wood utility poles in the last decades. Wood destroying basidiomycetes inhabiting sites where poles have been installed, have developed resistance against wood pr...

The presence of high concentrations of arsenic (As) decreased the shoot and root dry weight, chlorophyll and P and Mg content of Eucalyptus globulus colonized with the arbuscular mycorrhizal (AM) fungi Glomus deserticola or G. claroideum, but these parameters were higher than in non-AM plants. As increased the percentage of AM length colonization and succinate dehydrogenase (SDH) activity in th...

Trichoderma spp. are fungus considered one of the most attractive for biological control due to its different mechanisms action against plant pathogens and promote growth productivity. The molecular characterization this group antagonists is great importance conducting studies in area biodiversity identifying selecting possibility their use control. Objective work was identify 29 isolates based...

A pot experiment was conducted with the single and combined doses of fungicides, plant extracts antagonist for management nine rice pathogens. total 13 treatments including controls or without inocula pathogen were tested. Amongst all only T6 (Bavistin + Azadirachta indica Trichoderma harzianum) showed highest percentage seed germination seedling vigor index seeds inoculated Alternaria alternat...

Abstract Background Powdery mildew was found in most of the sunflower fields Egypt, causing severe yellowing blade, petiole, stem and calyx, as well a considerable defoliation during summer season 2018. Out fungal mycelium from infected leaves, collected four Egyptian Governorates (Kafr El-Sheikh, Gharbia, Giza El-Beheira), five isolates powdery pathogen were obtained identified using morpholog...