biological efficacy of trichoderma species may differ due to variations in ecosystems. this study was conducted to assess the biocontrol efficacy of some native trichoderma isolates against fusarium oxysporum, an important causal agent of potato wilt disease under laboratory and greenhouse conditions in shahrood agricultural research center, shahrood, iran during 2006-2007. fourteen isolates we...

application of trichoderma species is a harmless method in controlling soil borne plant diseases thus reducing hazardous pesticide use and environmental pollution. some trichoderma isolates performing proper inhibitory effect against fusarium oxysporum f. sp. tuberosi under laboratory and green house conditions were screened against wilt disease of potato caused by this pathogen under field con...

the aphid species, cinara pini (linnaeus, 1758) reported in our previous work as a new aphid on pinus trees for iran, was described using the classic method and through analysis of coi gene sequence. in the next step, we addressed the efficiency of the entomopathogenic fungus, lecanicillium longisporum (zimm.) zare and gams strain lrc 190, on the aphid. the fungus was administered to the second...

insect growth regulators and spinosyns which are physiologically and ecologically selective, respectively, have been investigated as replacements or complements to non-selective conventional insecticides. the effects of diflubenzuron, hexaflumuron, profenofos, spinosad and thiodicarb were assessed on the 1st instars of cotton bollworm, helicoverpa armigera (hã¼bner) using dietary and leaf disc ...

A large number of factors associated with the agent and habitat can be manipulated when making a biocontrol release. Yet, it is only recently that an experimental approach has been taken, particularly with the release of arthropod weed biocontrol agents, for example examining factors such as release size to test ideas originating from theoretical or retrospective studies. For release size, both...

BACKGROUND This study aimed to develop a biocontrol system for ginseng root rot caused by Fusarium cf. incarnatum. METHODS In total, 392 bacteria isolated from ginseng roots and various soils were screened for their antifungal activity against the fungal pathogen, and a bacterial isolate (B2-5) was selected as a promising candidate for the biocontrol because of the strong antagonistic activit...

The intensive use of pesticides to control pests in agriculture has promoted several issues relating to environment. As chemical pesticides remain controversial, biocontrol agents originating from fungi could be an alternative. Among them, we highlight biocontrol agents derived from the fungi genus Trichoderma, which have been documented in limiting the growth of other phytopathogenic fungus in...

For most of the half century that aflatoxigenic species have been intensively studied, these molds were known only to reproduce asexually, with parasexuality found only in the laboratory between certain mutant strains. Therefore, the fairly recent discovery of their sexual (teleomorphic) states creates a new wrinkle in our understanding of the field behavior of these agriculturally significant ...

The Pseudomonas fluorescens strain UM270 was isolated form the rhizosphere of wild Medicago spp. A previous work has shown that this pseudomonad isolate was able to produce diverse diffusible and volatile compounds involved in plant protection and growth promotion. Here, we present the draft genome sequence of the rhizobacterium P. fluorescens strain UM270. The sequence covers 6,047,974 bp of a...

Studies on actinobacterial diversity in limestone habitats are scarce. This paper reports profiling of actinobacteria isolated from Hundung limestone samples in Manipur, India using ARDRA as the molecular tool for preliminary classification. A total of 137 actinobacteria were clustered into 31 phylotypic groups based on the ARDRA pattern generated and representative of each group was subjected ...