Studies on the effects of xenobiotic on radial growth and dry weight biomass of the soil fungus Trichoderma sp.

摘要

Plant growth and development are greatly influenced by soil edaphic factor and microbial community present in the rhizosphere. Although some microorganisms are important, some can cause disease in plants and lead to the death of the plant. Trichoderma sp. is an important soil fungus which has the potential to control other soil-borne plant pathogens. To measure the bio-efficacy of Trichoderma sp. in integrated pest management, its compatibility along with other pesticides has to be assessed. GLV-71 (nitrosoglyphosate) and Elpida (emamectin benzoate) are the two commonly used herbicides and insecticides worldwide. We investigated the application of these two pesticides with their effect on the growth of Trichoderma sp. Different concentrations (half dose, field recommended dose and double dose) of the two pesticides were tested on the growth of the selected fungal species in vitro. The result shows that nitrosoglyphosate and emamectin benzoate have concentration dependent effect on the growth of Trichoderma sp. Between the two pesticides, GLV-71 shows greater effect on the growth of the microorganism. This experiment shows that Elpida exhibit more compatibility along with Trichoderma sp. as a potential bio-control agent rather than GLV-71.