Evaluation of the Growth Parameters with Respect to Bio-control Agents with Chemical Fungicides against Cercospora Leaf Spot of Okra (Abelmoschus esculentus L.) Moench

Abstract

Okra (Abelmoschus esculentus L.) is one of the fore most vegetable crop grown during kharif as well as summer seasons. Cercospora leaf spot incited by Cercospora spp. is one of the emerging disease in all regions wherever okra is grown. C. abelmoschi causes sooty black, angular spots and cause severe defoliation common during humid seasons. An experiment was conducted to evaluate the efficacy of bioagents and chemicals viz., T0 – Untreated control,T1 Mancozeb (1%) + Trichoderma (4%), T2 - Mancozeb (1%) + Pseudomonas (4%), T3 Mancozeb (1%) + Bacillus subtilis (4%), T4 - Mancozeb (1%) + Trichoderma(2%) + Pseudomonas(2%) ,T5 - Mancozeb (1%) + Pseudomonas (2%) + Bacillus subtilis (2%), T6 Mancozeb (1%) + Bacillus subtilis (2%) + Trichoderma (2%), T7 - Mancozeb (1%) against Cercospora leaf spot of okra. Studies revealed that minimum disease intensity , Maximum plant height , maximum no. of branches per plant and Maximum no. of fruits was observed in T4 - Mancozeb (1%) + Trichoderma (2%) + Pseudomonas (2%) and is hereby considered as the best treatment.