Population of Trichoderma harzianum strains in rice rhizospheresat different interval after seed sowing

When Trichoderma harzianum strains were applied to rice seed as seed biopriming and such seed were sown in the pots containing soil and population dynamics of each respective strain were measured in the rice rhizosphere, maximum recovery of CFUs were noticed in case of T. harzianum strain IRRI-1 followed by IRRI-6, IRRI-2 and IRRI-4 at 21 day, 32 days and 45 days after sowing. The population of T. harzianum could be only noticed up to 45 days after sowing, because due to drought exposure to these rice plants, they could not survived beyond 45 days, hence observation beyond 45 days was not possible. During present studies also, T. harzianum population in the rhizosphere of rice was at its highest at 45 days after sowing of T. harzianum treated seed.