feijoa as a fruit crop and ornamental tree is cultivated in the subtropics and warm temperate areas of the world including brazil, united states, new zealand and japan. a new disease with brown rot symptom on fruit occurred in feijoa orchards of northern iran in which it has become popular as a fruit crop. the objective of the present study was isolation and identification of the causal pathoge...

Broad-spectrum disease resistance against two or more types of pathogen species is desirable for crop improvement. In rice, Xanthomonas oryzae pv. oryzae (Xoo), the causal bacteria of rice leaf blight, and Magnaporthe oryzae, the fungal pathogen causing rice blast, are two of the most devastating pathogens. We identified the rice BROAD-SPECTRUM RESISTANCE 1 (BSR1) gene for a BIK1-like receptor-...

pantoea ananatis is an important pathogen causing bacterial center rot in onion. isolated strains from onion soft rot bulbs based on morphological characteristics were tested for hypersensitivity reaction on tobacco. pathogenic strains underwent some biochemical tests which detected the presence of p. ananatis, based on rna16s sequencing, this result was confirmed. symptoms were reproduced by i...

abstract common root rot induced by bipolaris sorokiniana, is one of the most important diseases of wheat. chemical control of this disease is difficult because of it is a soil-born pathogen, so that, application of other methods is useful to reduce disease level especially resistance cultivars. in this research, were examined reaction of some wheat cultivars and lines against common root rot i...

in order to detect hydrogen cyanide gene and to determine pseudomonas fluorescent efficiency in producing hydrogen cyanide for controlling the growth of rhizoctonia solanipathogen (the causal agent of sugar beet root and crown rot), samples were collected from sugar beet rhizosphere in sabzevar fields. after soil sampling and purification, 31 pseudomonas spp. isolates were separated on specific...

in order to characterizeblackleg and soft rot agent of potatoin ardabil province, samples showing mentioned symptoms were gathered from fields and storages during 2012 and 53 pectolytic isolates were obtained in primary purification. after confirming their pathogenicity, phenotypic features were investigated and compared to those of the reference strains. rotting severityof isolates and infecti...