Authors : M.N. Bhajbhuje
Page Nos : 62-66
Description :
Response of some plant growth regulators was studied in-vitroagainst leaf blight pathogen of cauliflower, Alternaria brassicae (Berk.) Sacc. All test chemical inducers significantly reduced spore germination and germling growth of pathogen at 10-2to10-4Mconc. Test pathogen exhibitedsensitive response against 10-2 conc. of naphthalene acetic acid, reducing spore germination by 86% and germ tube growth by 14% over untreated control. Moreover, all test chemical inducers at 10-1M conc had absolute inhibitory effect on spore germination of pathogen. Indol-3-acetic acid had least inhibitory effect against test pathogen of these parameters undertaken. The results revealed possibility of usage plant growth regulators in inducing phytoalexin compound in susceptible plant cultivars, results to increase resistance against the leaf blight causing pathogen.
