استحثاث المقاومة الجهازية في الطماطم البندورة لنيماتودا تعقد الجذور باستخدام الفطر bassiana Beauveria و خليط من فطور المايكورايزا

Abstract EN

This study aimed to estimate the efficiency of Beauveria bassiana and a mixture of mycorrhizal fungi in inducing systemic resistance in tomato against root knot nematodes Meloidogyne javanica.

Two application methods were used, the first was seed treatment with a fungal mixture (B.

bassiana + mycorhizal fungi) and the second was spraying plant shoots with B.

bassiana only.

Treatment with B.

bassiana at 1011 spores/ml was superior when sprayed on plant shoots as it led to the least number of second generation juveniles (64 Juveniles) that were able to penetrate the roots, followed by seed treatment with the same fungal concentration (87 juveniles), compared with 787 juveniles in the control treatment.

B.

bassiana shoot treatment produced the least galling index of 3, as compared to 9 for the control treatment.

Seed treatment with 1011 spores/ml significantly increased root fresh and dry weight (1.657 g and 0.148 g, respectively) compared with the control treatment (0.673 g and 0.066 g, respectively), and significantly increased shoot fresh and dry weight (5.060 g and 0.319 g, respectively), as compared to the control (1.650 g and 0.103 g, respectively) treatment.

Such results demonstrated the high efficiency of B.

bassiana in inducing systemic resistance in tomato plants against infection with the root knot nematodes and in the increase of plant growth parameters.

Keywords: Meloidogyne javanica, induced systemic resistance, Beauveria bassiana, mycorrhizal fungi.