مهار زیستی نماتد ریشه گرهی Meloidogyne incognita توسط قارچTrichoderma harzianum Iran2375c در خیار

Biocontrol of nematodes is now a priority in order to reduce the harmful effects of chemicals, including human health and environmental pollution. In this research, four leaf seedling were inoculated with a concentration of 106 spores and after 10 days of inoculation of the soil by the fungi, 3000 eggs and juvenile stage two of Meloidogyne incognita nematode per a kilogram were inoculated to the root of seedling. Experiment were carried out in greenhouse condition in completely randomized design with four treatment in ten replications. Two month after inoculation of nematode, plant growth indices and indices related to nematode were measured. According to the results of analysis of variance of stem length in nematode treatment at 5% level, stem fresh weight in fungul treatment at 1% level, stem dry weight at 1% level, in nematode treatment and 5% in fungal treatment, root length in treatment of fungi and nematode treatment at 1% level, in treatment of fungi and nematode at 5%T root fresh wight in nematode treatment, treatment of fungi and nematode at 1% level and root dry weight in nematode treatment at 1% level to control was meaningful. According to the analysis of variance, all indices realated to the nematode (population of juvenile stage two in 200 g of soil, number of gall and egg mass per gram of root, number of eggs in each egg bag) showed a significant difference at 1% level. The results of this study indicts the potential of this fungus in biological control of this nematode and improve plant growth.