Synergistic Effectivity of Arbuculus Mychorrizal Fungi and Mychorriza Helper Bacteria againts Pratylenchus Coffeae

Abstract

controlled. Method of control in accordance with Green Economy concept is biological control. One of biological control agents that potentially useful in controlling nematodes is mycorrhiza. Increasing the effectiveness of mycorrhiza can be obtained through the addition of Mychorriza Helper Bacteria [MHB]. Objectives: to examine the synergistic effect of arbuculus mycorrhizal [AM] fungi and MHB [B. subtillis and P. diminuta] in controlling P. coffeae in the Arabica coffee seedlings and analyze its mode of action. Results: The results showed that addition of both B. subtillis and P. diminuta were able to improve the ability of AM fungi Glomus spp. in reducing populations of P. coffeae, canopy damage scores, and root damage scores. P. coffeae population declined about 87.4% to 97.02% compared to controls. Applications those MHB also improved plant peroxidase activity. Conclusion: MHB was able to synergize with AM fungi in reducing populations of P. coffeae while enhancing the growth of Arabica coffee seedlings.