Effect of plant extracts and fungicides on associated pathogens of capsicum (Capsicum annum) seed in storage

Abstract

The effects of seed treatment on the prevalence of seed borne pathogens and quality of capsicum seed was studied with Autostin 50 WP (Carbendazim), Dithane M-45 (Mancozeb) @ 2.2 g/kg, Rovral50 WP (Iprodione) @ 2.0 g/kg, Provax-200 WP (Carboxin+ Thiram) @ 3.0 g/kg, Garlic extract @ 1:1, Garlic extract @ 1:2 , Neem leaf extract @ 1:1, Neem leaf extract @ 1:2, Zinger rhizome extract @ 1:1, Zinger rhizome extract @ 1:2 under storage condition. Prevalence of seed-borne pathogens, seed germination, speed of germination and vigour index of seedling were recorded at 0 day, 75 days and 150 days after storage.The fungi Alternaria sp., Aspergillus sp., Fusarium sp., Carvularia sp., Colletotrichum sp., Penicillium sp. and Rhizopus sp. were identified from the treated seeds during different storage periods, where the untreated control showed maximum prevalence of the pathogens throughout the storage period. Provax-200WP (Carboxin + Thiram) treated seeds were free from infection though Garlic extract @ 1:1 w/v, Zinger rhizome extract @ 1:2 w/v and Zinger rhizome extract @ 1:1 w/v gave better germination, speed of germination, seedling dry weight and vigour index.

Bangladesh J. Agril. Res. 48(4): 421-431, December 2023