Asian Journal of Microbiology, Biotechnology & Environmental Sciences Paper

Vol 16, Issue 3, 2014; Page No.(561-574)

DELETERIOUS RHIZOBACTERIA AS WEED BIOLOGICAL CONTROL AGENT: DEVELOPMENT AND CONSTRAINTS

MARYAM SHIRDASHTZADEH

Abstract

The various regions of the world are plagued by weed problems which continue to threaten the productivity of agricultural lands and natural areas and there are not adequate, cost-effective control measures presently for many weeds (Sforza and Jones, 2007). Chemical herbicides are the main solution to weed problems; however, the high costs of developing chemical herbicides and their environmental problems, have prompted researchers to investigate biological approaches of weed control. Plant–bacterial interactions in the rhizosphere play an important role in the plant health and soil fertility. Deleterious rhizobacteria (DRB), as free-living soil bacteria deleterious to the plant growth, colonize the plant root and inhibit the weed growth. Therefore, DRB have used as weed control agents in contemporary agriculture(Kremer and Kennedy, 1996). Bacterial compounds such as phytotoxins can be used in biological control of weeds, so their chemistry and interaction with host tissues appear to be effective for reduction of synthetic chemicals (Carvalho et al., 2007). This paper aims to provide an overview of different aspects of DRB and their potential to use as bioherbicides, with considering the constraints for the bioherbicide commercialization.

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