regarding the importance of bacillus thuringiensisisolates in microbial control, we attempted to collect native isolates and study their virulence on diamondback moth, plutella xylostella. more than 148 samples were collected from guilan, mazandaran, west azarbaijan and alborz provinces. experimental samples including soil samples from forest, fruit gardens, agricultural fields, diseased and de...

during the years 2007 and 2008, samples of winter jasmine (jasminum nudiflorum) with symptoms of galls on shoots were collected from shiraz, fars province, iran. gram and oxidase negative, aerobic bacterium that produced fluorescent pigment on kingۥs b medium was isolated from galls of infected trees. all isolates produced a hypersensitive reaction in tobacco. they were negative in arginine dih...

During the years 2007 and 2008, samples of winter jasmine (Jasminum nudiflorum) with symptoms of galls on shoots were collected from Shiraz, Fars province, Iran. Gram and oxidase negative, aerobic bacterium that produced fluorescent pigment on Kingۥs B medium was isolated from galls of infected trees. All isolates produced a hypersensitive reaction in tobacco. They were negative in arginine dih...

During the investigation of fungi associated with black (sooty) head mold of wheat and barley in different regions of Golestan, Alborz and Qazvin provinces (Iran) in growing seasons of 2014–15, several isolates with typical characteristics of the genus Harzia Costantin were collected. Based on the morphological characteristics, all isolates were identified as H. acremonioides (Harz) Costantin. 

abstract some agricultural fields of razevi and north khorasan provinces were sampled for identification and resistance to metalaxyl of pythium ultimum species isolates. isolation was done between years of 2007 to 2009. van der plaats- niterink key to species of pythium and specific its region of rdna were used for morphological and molecular identification respectively. micrometric characteris...

the botrytis cinerea is one of the most important agents of strawberry fruit rot. in order to identify the pathogenicity potential of the isolates on fruits and the antifungal effect of anise essence on this fungus, forty one isolates of b. cinerea was collected from different areas of mazandaran province on strawberry showing symptoms of gray rot on fruits. following the purification of the fu...

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...

samples were collected from soil and as well from phyllosphere of rice plant and subjected to dilution plate technique on rbsf trichoderma selective medium. a total of 202 trichoderma isolates were obtained from rice fields at different geographical locations distributed all over mazandaran province. single spore isolates were obtained and genomic dna extracted from all the isolates using dna e...