Effect of Azadirachta indica A. Juss var indica, Nicotiana tabacum L., and Derris elliptica (Roxb.) on Growth of Duckweed

Abstract:

The study was designed to evaluate the inhibitory effects of selected herbs on plant growth. Three insecticides containing plants (leaf of Azadirachta indica A. Juss var indica (AI), Nicotiana tabacum L. (NT), and root of Derris elliptica (Roxb.) (DE) were selected for various solvent extractions. Five extraction solvents: methanol, hexane, dichloromethane, butanol and aqueous were used in this study. The test method was lemna phytotoxicity assay which measured the inhibitory effect on duckweed, Lemna minor growth. This toxicity test proved to be a practical bioassay method because this method is simple, sensitive and cost effective. Butanol extracts of AI were shown to have more inhibition activity on duckweed growth than NT (% inhibition growth rate is 66.08, 27.08 respectively). Butanol extracts of AI had inhibitory effect (EC₁₀) of 40.87 μg/ ml while dichloromethane extracts had EC₁₀ of 131.72 μg/ ml. It could therefore be concluded that butanol extracts of AI showed the greatest inhibitory effects. The results from this study suggest that butanol extracts of AI were the most promising candidates for biological weed control and might be used as potential natural herbicides or as alternatives for the reduction of chemical herbicides. The study is worthy of further investigation since this could provide potential bioherbicide and may lead to the discovery of new effective and applicable bioherbicide.

• Periodical: Advanced Materials Research (Volume 1060)
• Pages: 211-214
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.1060.211
• Online since: December 2014
• Authors: Patamawan Phuagphong*, Srisombat Nawanopparatsakul, Nudchanart Kitcharoen
• Keywords: Azadirachta indica A. Juss var indica, Bioherbicide, Derris elliptica (Roxb.), Nicotiana tabacum L., Phytotoxicity

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