00291nam a2200109 a 450000500170000008200160001710000180003324500580005126000300010930000220013963000200016120251202164143.0  a581.21bMAH  aMahadevan, A.  aGrowth regulators, microorganisms and diseased plants  aDelhibOxford & IBHc1984  axii, 466p, 22 cm.  aPlant pathology