["Effects of culture conditions on productivity, germinability and bioactivity of Trichoderma atroviride LU132 conidia were assessed to identify the factors affecting conidium 'fitness' (quantity and quality) and to withstand variable environmental conditions, increase conidial productivity, and perform optimum bioactivity.", 'The interaction effects of temperatures (20 or 30°C) vs hydrocarbon types (dextrose or sucrose in constant C\xa0:\xa0N 5\xa0:\xa01) were assessed for bioactivity and colonization potential in pot experiments with ryegrass in the presence of pathogen, Rhizoctonia solani. Trichoderma atroviride produced in different culture conditions increased some growth parameters of ryegrass plant and also reduced the pathogenicity effects of R.\xa0solani. For example, Trichoderma colony produced at 20°C with sucrose increased all plant growth parameters and conidia produced at 20°C with dextrose gave the greatest bioactivity.'] Do culturing conditions affect biological control activity of Trichoderma atroviride against Rhizoctonia solani in ryegrass?