本药剂能有效地防治近百种一年生及多年生杂草。
The agent can effectively prevent hundreds of species of annual and perennial weeds.
美洲多年生粗杂草，茎穿过巨大的叶子，花紫色或暗红色。
Coarse weedy American perennial herb with large usually perfoliate leaves and purple or dull red flowers.
选用24%氨氯吡啶酸水剂，对林地一年生及多年生阔叶杂草、灌木进行防除试验。
The controlling test was carried out to the annual and perennial broadleaved weed and shrub on forestland with 24% picloram Sc.
结果表明，放牧能明显抑制一年生禾本科杂草及播种多年生禾本科牧草的生长，但对白三叶和草地有害植物的生长都有促进作用。
The results showed that grazing restrained the growth of annual gramineae weeds and perennial gramineae grass, but accelerated the growth of white clover and noxious plants.
农田杂草由开垦初期以多年生草本植物占优势到开垦多年以后以一年生草本植物占优势。
In the reclaimed farmland, the weeds dominated by perennial herbs in the initial stage of reclamation are replaced by the weeds dominated by annual herbs after reclamation for some years.
农田杂草由开垦初期以多年生草本植物占优势到开垦多年以后以一年生草本植物占优势。
In the reclaimed farmland, the weeds dominated by perennial herbs in the initial stage of reclamation are replaced by the weeds dominated by annual herbs after reclamation for some years.
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