مدیریت زیستی نماتدهای ریشه‌گرهی (Meloidogyne incognita) و زخم ریشه (Pratylenchus sp.) توسط اکتینومیست آنتاگونیست Streptomyces sp. در شرایط آزمایشگاه

Root-knot nematodes and root-lesion nematodes are among the most important plant parasitic nematodes that cause significant damage to the root system of plants. Management of nematodes is difficult because of their wide host range and survival in diverse environmental conditions. Due to the extensive use of pesticides and their deleterious effects on the environment and human health, their use has been limited. Hence, using eco-friendly methods like biological control has attracted special attention. This research used the actinomycete bacterium Streptomyces sp. isolated from the rhizosphere of kiwifruit. The potential of this bacterium in the mortality rate of second-stage juveniles (J2s) of Meloidogyne incognita and mixed stages of Pratylenchus sp. were assessed in the form of a completely randomized design in five replications and at three time-points including 24, 48 and 72 hours after treatment in laboratory conditions. For this purpose, one ml of the suspension of this bacterial isolate (108 CFU/ml) was added to 1 ml of J2s of root-knot and 50 mixed stages of lesion nematodes and were kept at room temperature. The results showed that this isolate by producing pectinase, chitinase, cellulase, and amylase, increased the mortality rate of second-stage juveniles (J2s) of M. incognita by 54, 62 And 76%, and juveniles and adults of Pratylenchus sp. by 46, 55 And 71%, respectively, compared to the control. Thus, this isolate with effective plant-growth promoting traits can be a promising bio-control agent and a suitable biopesticide candidate for microbial formulation in the biological control of important plant parasitic nematodes.