Population dynamics of root inhibiting and invading micro-flora in citrus rhizosphere

Abstract

Present investigation was carried out during 2014 - 2015 at Department of Plant Pathology, All India Co-ordinated Research Project on Fruits, Dr. P. D. K. V. Akola and Department of Soil Science and Agricultural Chemistry, Post Graduate Institute. Dr. Panjabrao Deshmukh Krishi Vidyapeeth, Akola (M.S.) by collecting soil samples from Akola (AK), Amravati (AM1 & AM2), Wardha(WR), Washim (WA),Yavatmal (YA), Nagpur (NA1&NA2) and Buldhana (BU) sampling site of Vidarbha region, to study the population dynamics of micro-flora in rhizosphere soil ecosystem of citrus. The maximum c.f.u. population of healthy rhizosphere was recorded in Wardha (WR) sampling sites i.e.99.22×105-cfu g-1 dry soil while in diseases, it was recorded in Amravati (AM2) i.e. 83.66 c.f.u. g-1 dry soil. The maximum fungal colonies i.e. 33.11×103 in healthy rhizosphere soil was recorded in Yavatmal (YA) sampling sites. The prospect of manipulating crop rhizosphere microbial populations by inoculation of beneficial organisms i.e. Pseudomonas fluorescence and Trichoderma spp. and managing soil physico-chemical properties of soil, increases plant growth and control of many soil borne diseases has shown considerable promise in laboratory and field.