Vol. 11, Special Issue 7 (2022)

Author(s):
Roshan Salam, Kripalini N, RK Imotomba Singh, L Supriya and Kangjam Bumpy

Abstract:
Chilli (Capsicum annum L.) also known as morok in Manipur is a spice crop consume all over the world. Infected chilli plants showing the CLS symptom were isolated. The disease samples were collected during September 2018-2019 & 2020-2021 from Imphal East district (viz., Keirao Bitra Lairembi Leikai, Keikhu Makha Leikai, Khurai Kongpal Chingangbam Leikai, Huikap Mayai Leikai, Wangkhei Keirungbam Leikai, Khongman Zone 5 & Langdum Lamkhai). Average Disease Incidence of the surveyed sites was found highest in Keirao Lairembi Leikai with 55.42% whereas the least disease incidence was found in Langdum Lamkhai (20.35%). Averaged disease severity was found highest in Keirao Bitra Lairembi Leikai with 28.50% whereas the least disease severity was observed in Khongman Zone 5 with 14.63%. The organism produced white- grey- olivaceous brown uniformly dense colonies on PDA media after incubation at 25˚C±1 for 15 days. In vitro evaluation of plant extracts resulted that the highest inhibition of growth & sporulation under 10% conc. was observed in garlic extract with 100% inhibition & turmeric extract was observed lowest inhibition with 5.55%. Similarly, under 15% conc. highest inhibition was observed in garlic extract with 100% inhibition & the lowest inhibition was observed in onion extract with 10.18% inhibition. The best biocontrol agent against the test fungus was found to be Trichoderma harzianum with 80.66% inhibition and the least effect against the test fungus was found in Trichoderma viride with 75.52% inhibition. In vitro evaluation of fungicides resulted that 100%inhibition of mycelial growth was found in four fungicides viz, Carbendazim 0.1% conc., Tebuconazole at 0.2% conc., (Carbendazim 12% WP+ Mancozeb 63% WP) at 0.2% conc. and mancozeb at 0.1% conc. & the least inhibition was observed in Captan at 0.2% conc. (inhibit85.22%).