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Cyperus entrerianus: A Little Known Aggressive Sedge in the Southeastern United States

机译：莎草（Cyperus entrerianus）：美国东南部鲜为人知的攻击性莎草

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摘要

Four of the world's worst weeds are in the genus Cyperus. These are smallflower umbrella sedge (C. difformis L.), yellow nutsedge (C. esculentus L.), riceflatsedge (C. iria L.), and the world's worst weed, purple nutsedge (C. rotundus L.) (7). Fourteen additional Cyperus species are listed in the Composite List of Weeds. Cyperus is in the sedge family (Cyperaceae) which consists of about 600 species found mostly in tropical to warm-temperate regions around the world (9). Cyperus entrerianus Bockeler is an aggressive, robust, fast growing, tenacious pest that produces large numbers of seeds (4). Apparently, it was introduced into the southeastern United States from temperate South America or Mexico (2). Presently, it is found in the southeastern United States from southeastern Texas to southern Georgia (4). The senior author has observed severe infestations of this weed in ditches, pastures, and fallow fields in southwestern Louisiana and southeastern Texas. Our objectives are to alert weed scientists, agronomists, and others concerned to the potential of this species and to discuss its biology, distribution, ecology, and taxonomy.
机译：莎草属是世界上最严重的四种杂草。这些是小花伞莎草（C. difformis L.），黄色坚果（C. esculentus L.），稻米草（C. iria L.）和世界上最糟糕的杂草紫色坚果（C. rotundus L.）（7） 。在杂草的综合清单中列出了另外14种莎草属物种。莎草属莎草科（莎草科），大约有600种，主要分布在世界各地的热带到温带地区（9）。莎草（Cyperus entrerianus Bockeler）是一种侵略性强壮，快速生长的顽强害虫，可产生大量种子（4）。显然，它是从温带的南美或墨西哥引入美国东南部的（2）。目前，它在美国东南部从得克萨斯州东南部到乔治亚州南部的地区被发现（4）。资深作者在路易斯安那州西南部和得克萨斯州东南部的沟渠，牧场和休耕地中观察到了这种杂草的严重侵染。我们的目标是提醒杂草科学家，农艺家和其他有关人员注意该物种的潜力，并讨论其生物学，分布，生态学和分类学。

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