Antgonistic Potential of Bioagents Against Alternaria alternata and Corynespora cassiicola Causing Leaf Blight Disease of Cotton

Alternaria leaf spot affect cotton crop leading to yield loss. Present investigation deals with its management study using biocontrol agents and organic inputs under in-vitro condition. All of them showed inhibitory effect on mycelial growth of the pathogens. Among them Trichoderma harzianum was highly antagonistic followed by T. asperellum. Cow urine at 20 % concentration showed inhibition of mycelial growth. The results indicated antagonistic potential of Trichodermaharzianum and cow urine and suggested their suitability for managing leaf blight disease in cotton.