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看麦娘和日本看麦娘,这两种杂草是油菜轮作区和麦田危害最严重的杂草,为杂草群落优势种,以麦田防除最为困难。两种看麦娘的形态特征与区别。看麦娘为一年生禾本科杂草,秆多数丛生;叶鞘疏松抱茎,叶舌长约2毫米;穗圆锥形,花序呈细棒状,小穗长2~3毫米;颖膜质,近基部连合,沿脊有纤毛,侧脉下部具短毛;外稃膜质,等长或稍长于颖,下部边缘联合;从外稃中部以下伸出长2~3毫米的芒,中部稍膝曲,常无内稃;花药橙黄色,果时颖和稃包被颖果。幼苗第一片真叶呈带状后披针形,长1.5厘米,具直出平行脉3条,叶鞘也
Anemarrhenae and Anemarrhena asphodeloides, the two weeds are the weeds most affected by crop rotation and wheat field, are the dominant species of weed community and the most difficult to control by wheat field. Two kinds of morphological characteristics and differences of Ophthalmology. Ophiopogon japonicus is a weed with annuals, most of stalks covered; leaf sheath loosely clasped, ligule ca. 2 mm; spike conic, inflorescences finely rodlike, spikelet 2-3 mm; Calyx, along the ridge ciliate, lateral veins with short hairs; hissing membranous, equaling or slightly longer than the Ying, lower edge of the joint; extending from the lower part of the lemmas 2mm to 3 mm long central, Often no nephew; anthers orange-yellow, fruit and Ying Ying Ying Ying Ying package. The first leaf of the seedling was lanceolate and lanceolate with a length of 1.5 cm with 3 parallel straight veins,