formation and expantion of informal settlements are concequences of urban growth and zanjan isn't an exception to this regulation. najaf abad informal settlement has been formed and expanded on the bases of uncontrolled and exceeding rural immigration. this study aims to investigate role of social security in empowerment as well as elimination district problems of zanjan najaf abad. in the empo...

The aim of this study was to assess the effect of Trichoderma harzianum R3P2 biocontrol agent on soil microbial community in tobacco monoculture. To this end, we studied the changes in soil metabolic diversity with cell suspensions methodology using Biolog (Inc., Hayward, CA.) GN2 MicroplatesTM. Principal ® component analysis showed that functional abilities of the soil microbial community in t...

Most biocontrol agents for plant diseases have been isolated from sources such as soils and plants. As an alternative source, we examined the feces of tertiary larvae of the herbivorous rhino beetle, Allomyrina dichotoma for presence of biocontrol-active microbes. The initial screen was performed to detect antifungal activity against two common fungal plant pathogens. The strain with strongest ...

The antifungal mechanism of mycoparasitic fungi involves fungal cell wall degrading enzymes such as chitinases. Trichothecium roseum is an important mycoparasitic fungus with significant antifungal ability, but studies on chitinases of T. roseum were poor. Here, we report a novel chitinase cDNA isolated from T. roseum by PCR amplification based on conserved chitinase sequences. Southern blot an...

Individual nematodes were isolated from American chestnut blight-controlled cankers to determine if they were carriers of biocontrol (hypovirulent) isolates of the chestnut blight fungus, Cryphonectria parasitica. These hypovirulent isolates have a white fungal colony phenotype due to infection by the virus CHV1. Of 1,620 individual Aphelenchoides hylurgi isolated, 29.4% carried propagules of t...

Palumbo, J. D., Yuen, G. Y., Jochum, C. C., Tatum, K., and Kobayashi, D. Y. 2005. Mutagenesis of β-1,3-glucanase genes in Lysobacter enzymogenes strain C3 results in reduced biological control activity toward Bipolaris leaf spot of tall fescue and Pythium damping-off of sugar beet. Phytopathology 95:701-707. Lysobacter enzymogenes produces extracellular lytic enzymes capable of degrading the ce...