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Herbicidal activity of Pennisetum purpureum (Napier grass)

机译：狼尾草（Napier grass）的除草活性

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This study?investigates potential herbicidal effects of?Pennisetum purpureum?extracts on two selected weed bioassay species. Ethyl acetate extract of?P. purpureum?was able to suppress germination of bioassay species by 41%. Although, it had no phytotoxic activity on the root or shoot growth of bioassay species, it had caused?leaf discs of bioassay species to turn dark brown. Chromatographic separation of ethyl acetate extract yielded nine fractions. The highest suppressive ability was exhibited by fraction five where the shoot and root growth of bioassay species was inhibited markedly, while the colour of leaf discs changed from green to dark brown. The germination of the bioassay species is particularly sensitive to the fraction five, exhibiting approximately 20% reduction in germination, relative to the control. These results imply that?P. purpureum?contains phytotoxic compounds that can be developed as natural herbicide.
机译：这项研究调查了紫草提取物对两种选定的杂草生物测定物种的潜在除草作用。 P的乙酸乙酯提取物。紫癜能够抑制生物测定物种发芽41％。尽管它对生物测定物种的根部或枝条生长没有植物毒性活性，但它已使生物测定物种的叶盘变成深褐色。色谱分离乙酸乙酯萃取物，得到九个馏分。第五部分表现出最高的抑制能力，在第五部分中，生物测定物种的芽和根生长受到明显抑制，而叶盘的颜色从绿色变为深棕色。生物测定物种的发芽对馏分五特别敏感，相对于对照，其发芽减少约20％。这些结果表明？紫草含有可作为天然除草剂开发的植物毒性化合物。

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