Utlization of microbial antagonisms in lawn grass maintenance

A preventive against Rhizotonia Large Patch with microbial activities

Abstract

The results of the experiment certified the effectuality microbial antagonist applied to Rhizoctonia Large Patch broken out in Manillagrass (Zoysia matrella M.) and Japonese lawngrass (Zoysia japonica L. var. duriuscla).
(1) In the area where the microbial antagonists were applied after spiking the lawn and then water sprinkling was performed after rubbing it into the lawn grass, the Rhizoctonia infected patches disappeared completely in 16-18 days and the healthy lawn could be recovered.
(2) In the area where the microbial antagonists were applied after spiking but no water sprinkling was performed, the patches did not disappear.
(3) Some of fluorescent Pseudomonas were, separated from the microbial antagonists. Besides the above, it is probable that there is Siderophore, because color of the lawn in the area where the microbial material was applied has been much deeper than that in the peripheral area with out the microbial mateial, These two observations shows us that the antagonism of fluorescent Pseudomonas has probably an effectuality against Rhizoctomia Large Patch.