SCREENING OF SELECTED GARLIC VARIETIES AGAINST FUSARIUM ROT DISEASE CAUSED BY Fusarium proliferatum

Abstract

A field experiments was carried out to study the screening of selected garlic varieties in field and isolation, identification and pathogenicity test of Fusarium rot caused by Fusarium proliferatum was also done. The experiment was conducted in central farm and plant pathology lab, Sher-e-Bangla Agriculture university, Dhaka-1207 with RCBD (Randomized Complete Block Design) with three replications. The entire experimental plot was divided into three blocks, each of which then divided into 24-unit plots. A total eight varieties viz. BAU Rashun-1, BAU Rashun-2, BARI Rashun-1, BARI Rashun-2, BARI Rashun-3, BARI Rashun-4, Local Deshi and Local Indian was selected to conduct the study. In the following study the highest pre emergence mortality was observed in BAU Rashun-1 garlic variety with 31.35% germination failure and the lowest were found in BARI Rashu-1 with 14.19%. The maximum result was found for the post emergence mortality in BARI Rashun-3 with 13.22% mortality rate after germination and minimum result were found in Local Indian variety 6.15%. Leaf height showed negative correlation with the entire yield parameters considered and become significant at 0.01% level of probability and number of leaves showed positive correlation with all the yield defining characters except clove diameter (-.859). For disease incidence BARI Rashun-4 showed the highest susceptibility to Fusarium rot and maximum disease severity of garlic variety was observed in BARI Rashun-4. Maximum radial mycelial growth of Fusarium proliferatum was observed in BAR3I (9mm). The minimum radial mycelial growth was BAR2I (5.2mm). Pathogenicity test was done with only one susceptible variety BARI Rashun-4 in in-vivo condition by inoculating Fusarium proliferatum as soil inoculation. 27 pots were considered as test pot, 29.62% pre emergence mortality and 49.37% dead seedling was observed in in- vivo condition.