Vol. 11, Issue 2 (2022)

Author(s):
Geethika Yarasani and Sunil Zacharia

Abstract:
Mustard (Brassica juncea L.) is one among the major oil seed crops in India grown during Rabi season. Alternaria blight caused by Alternaria brassicae is one of the commonly found pathogen in mustard. The pathogen can affect host species at all stages of growth, including seed. A field experiment was conducted at Central Research Field, Department of Plant Pathology, SHUATS, Prayagraj, Uttar Pradesh during Rabi 2020- 2021 to evaluate the effect of selected bio-agents and botanicals in-vivo by foliar spray on Alternaria blight incidence. Maximum plant height (166.73 cm), maximum number of branches per plant (13/plant), maximum number of number of siliques (217.46), maximum number of seeds per siliques (7.73), minimum disease intensity (%) (48.8), maximum test weight (4.48 gm) and maximum yield (1.356 t ha-1) were recorded in the treatment T₁ – Trichoderma viride @10g/l followed by T₂ – Pseudomonas fluorescens@10g/l, T₄ – Mycel @ 250 gm/acre and T₃ – leaf extract of Lantana camara @10% as compared to T₅ – mancozeb @0.2% and untreated control T₀. Higher gross return value (Rs. 54240 ha-1), net return value (Rs. 24640 ha-1), and B: C ratio (1.83) was found in the treatment T₁ – Trichoderma viride @10g/l as compared to T₅–Mancozeb and T₀–control.