Estimation of Different Carbon and Nitrogen Sources against Fusarium oxysporum f. sp. vasinfectum (FOV) Causing Wilt Disease of Cotton

Abstract

Cotton (Gossypium hirsutum L.) is a major fiber crop that contributes significantly to global economic and social development. It is often referred to as "The White Gold" or "The King of Fibers". Cotton is a major cash crop in our country and belongs to the family Malvaceae. Cotton is a historically important commercial commodity, next to food grains, and serves as the primary raw material for the thriving textile industry. Cotton production, processing, textiles, and allied industries employ approximately 42 million people and sustain their livelihoods. In this present study, seven different carbon and nitrogen sources were tested for their suitability for the growth and sporulation of F.oxysporum f. sp. vasinfectum of cotton. Fusarium wilt caused by F. oxysporum f. sp. vasinfectum (FOV) is one of the most important and serious diseases. This disease is capable to cause tremendous loss to this crop in no time.  Among the different carbon source, the maximum growth was observed in glucose (345.20mg), which was followed by galactose (306.15mg), mannitol (281.10mg), fructose (270.34mg), sucrose (268.16mg), starch (257.91mg) and lactose (172.10mg).While, the poor growth was observed in control (85.38mg). For sporulation category, it was found that the fungus showed abundant (++++) sporulation in glucose, galactose and mannitol. Among the different nitrogen source, the maximum growth was observed in potassium nitrate (310.13mg)which was followed by calcium nitrate (302.30mg), urea (298.37mg), sodium nitrate (288.58mg), ammonium nitrate (272.57mg), ammonium chloride (183.45mg), ammonium oxalate (162.30mg). While, the poor growth was observed in control (59.11mg). For sporulation category, it was found that the fungus showed abundant (++++) sporulation in potassium nitrate and sodium nitrate.