Physiological Response of Zea mays to NaCl Stress with Respect to Azotobacter chroococcum and Streptomyces niveus

Abstract

Ability of biocontrol agent Streptomyces griseus to control the F. oxysporum f. sp. lycopersici. (FOL) induced fusarium wilt disease in tomato was studied. Talc-based formulation of Streptomyces griseus either single or with or without chitin were developed and tested under greenhouse conditions. Self life of S. griseus in talk based formulation showed stable up to 105 day with 122 x 10 , 118 x 10 cfu/g after storage at 30°C th 7 7 and 4°C correspondingly. The various formulations of S. griseus were assessed for their efficiency in controlling F. oxysporum incidence in greenhouse conditions. The treatments were imposed as seed treatment and seedlings dip. A significant lowest disease severity on treatment of self fusant (SFSg 5) S. griseus suspension (root dipping) and chitin amended S. griseus (root dipping) was recorded compared with chitinase enzyme preparation of the same. For effective disease control, S. griseus introduced to root system before Fusarium oxysporum infestation than that of seed treatment.