Vol. 12, Issue 9 (2023)

Author(s):
Bikram Keshari Pani, Bhakta Charan Dhir and Dibyaranjan Mishra

Abstract:
Field trial were conducted to manage a variety of sesame diseases, especially the Macrophomina stem and root rot (MSR) by few bio-control agents like Trichoderma viride and Pseudomonas fluoroscens vis-a-vis two chemical checks. Among the organics, seed treatment with T. viride @ 10 g/kg + Furrow application (FA) of enriched T. viride (2.5 kg of T. viride + 100 kg vermicompost) @ 250 kg/ha followed by rhizosphere inoculation of T. viride at thinning and spray at flowering and capsule stage @ 5 g/l (T₃) was found most effective in inducing lowest incidence of MSR (12.85%), Cercospora leaf spot(14.38 PDI), Phytophthora blight (12.20 PDI) as well as sustaining highest seed yield (460.65 kg/ha) and maximum BC ratio (2.01). It was further recorded that the organics could reduce 25.45 to 51.12% MSR infection with a corresponding 15.53 to 27.53% increase in yield over control. However, both the chemical checks were superior in minimizing disease incidence resulting in higher grain yield vis-à-vis the organic treatments. Among all the treatments, ST with carbendazim @ 3 g/kg + spray of tebuconazole 50% + trifloxystrobin 25% @ 0.5 g/l at flowering initiation stage (45 DAS) followed by a spray at capsule formation stage (60 DAS) recorded minimum incidence (10.29%) of stem and root rot as well as maximum yield (492.6 kg/ha).