perennial weed
美 [pəˈreniəl wiːd]英 [pəˈreniəl wiːd]
- 多年生杂草
perennial weed-
Chemical control of perennial grassy weed in grassy carpet
禾本科草坪多年生禾本科杂草的化学防除方法
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Perennial latifolious weed stage ;
多年生阔叶杂草占优势的草坪杂草阶段；
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The controlling test was carried out to the annual and perennial broadleaved weed and shrub on forestland with 24 % picloram Sc.
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。
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