BLIGHT CONTROLLING AGENT FOR USEFUL PLANT OF FAMILY GRAMINEAE USING WEED PATHOGEN AND CONTROLLING METHOD

摘要

PURPOSE: To obtain a blight controlling agent free from environmental pollution problem and applicable without giving adverse effect on useful plants by using a specific microorganism having blight controlling activity on useful plants of the family Gramineae. ;CONSTITUTION: This blight controlling agent contains microorganism belonging to Exserohilum rostratum known as a pathogen of weed and having blight controlling action on useful plants of the family Gramineae. The especially preferable microorganisms are Exserohilum rostratum Ku-1 (FERM BP-5131) and/or Exserohilum rostratum Ku-2 (FERM BP-5131). Rice blight and other blights are controlled by scattering the blight controlling agent to the useful plant of the family Gramineae. The microorganism is usually used in the form of conidiospore and its concentration is 10³ to 10⁷/mL in the case of solution. The agent is applied to a field at a rate of 10⁸ to 10¹² conidiospores per 10 are of the field. The blight to be controlled by the agent is rice blast, helminthosporium leaf spot, bacterial leaf blight, sheath blight, etc.;COPYRIGHT: (C)1997,JPO