Response of transplanted and direct seeded onion (Allium cepa L.) to the presence of globe fingerush weed [Fimbristylis miliacea (L.) Vahl] [manuscript]
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Date
2019
Authors
Kaiser Angelo A. Morla
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Abstract
Infestation of F. milliacea in onion communities bring impact on onion plant. Determining the competitive ability through crop weed competition provides information on weed control measure appropriate to used.
The study was conducted to determine the yield loss of onion due to infestation of F. miliacea and the degree of their competitiveness. The study was composed of five treatments that were replicated four times in Randomized Complete Block Design arrangement. All the data gathered were subjected to analysis of variance (ANOVA) using Statistical Tool for Agricultural Research (STAR, 2013) while treatment means were compared using least significant difference (LSD) at 5% level of significance.
Different densities of F. miliacea (10, 15, 20 and 25) negatively affected the yield parameters of onion bulb particularly the weight of bulbs. Except the bulb weight, agronomic parameters of transplanted onions were not significantly affected by the presence of F. miliacea percent yield loss on transplanted onion ranged from 11 to 38%. Meanwhile, F. miliacea significantly affected the plant height at 70 to 91 DAS, and number of leaves at 43 to 91 DAS for direct seeded onion. Biomass and dry weights of bulb and leaves and leaf length were also significantly reduced. Yield loss on direct seeded onion due to competition by F. miliacea at different densities (10, 15, 20 and 25) were 76 to 90%.