多年生杂草

草甘膦是一种施用于叶片的、广谱的、非选择性的、后现性的有机磷类除草剂，它对于许多一年生和多年生杂草和双子叶植物都有极强的控制能力。

Glyphosate is a foliar applied , broad spectrum , post-emergence herbicide capable of controlling annual and perennial grasses and dicotyledonous weeds .

多年生杂草比一年生杂草多；

More of the weeds are perennials .

美国东南部的一种多年生杂草，具有白边的花序；原来被用作民间的医药。

Perennial herb of southeastern United States having white-rayed flower heads ; formerly used as in folk medicine .

选用50%莠去津WP4个不同施用浓度，对玉米地一年生杂草和多年生杂草进行药效试验，探索不同浓度的防除效果。

Different concentrations of 50 % atrazine WP were tested to investigate the weed control effect to annual and perennial weeds .

在欧洲中部和南部的山上长的小穗的多年生杂草，具有非常小的花，通常枝干无叶。

Small tufted perennial herb of mountains of central and southern Europe having very small flowers of usually leafless stems ; sometimes placed in genus Lepidium .

抛秧前须用药剂封闭，抛秧前期（抛秧后10天以内）施用，以防除一年生杂草为主；中期（水稻分蘖期）施用，以防除多年生杂草为主。

Throwing before 5045 pharmacy closed early , throwing ( throwing within 10 days after ) application to control annual weeds ; mid ( tilling ) application to control perennial weeds .

草甘膦能防除绝大多数一年生及多年生杂草，但由于其非选择性，在杀死杂草的同时对农作物也具有毒害作用。

The glyphosate could control most of weeds , but it had poisoning effect on the crops when it controled weeds , because of its non-selective so as to limit its wide application .

本文分别从化学除草机理的研究进展，一年生杂草、多年生杂草、阔叶杂草化学防除和用药安全性的研究进展几方面对草坪杂草化学防除的研究状况进行了综述；

The progress of annual , perennial and broadleaf lawn weeds chemical control , the mechanism of weeds chemical control as well as the safety of herbicides applying is surveyed in this paper .

多年生阔叶杂草占优势的草坪杂草阶段；

Perennial latifolious weed stage ;

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.

芳氧苯氧丙酸酯（简称APP）类化合物是近二十年发展起来的活性很好的新型除草剂，用于防除一年或多年生禾本科杂草。

Aryloxyphenoxypropionate ( APP ) derivatives have been found to be one kind of effective herbicides for the control of annual and perennial grasses in broadleaf crops in recent twenty years .

禾本科草坪多年生禾本科杂草的化学防除方法

Chemical control of perennial grassy weed in grassy carpet

高寒牧区初建多年生禾草人工草地杂草群落特性的研究

Characteristics of Weed Community of Preliminary Established Artificial Grassland of Perennial Grass in Alpine Region

草甘膦是一种非选择性广谱除草剂能有效得去除一年生及多年生深根恶性杂草，在作物生产中得到广泛应用。

Glyphosate is a non-selective , broad-spectrum herbicide that is very effective against both annual and perennial weeds . It is widely applied to crop planting .

每亩用有效量1克即可防除和强烈抑制麦田二十多种一年生和多年生的双子叶杂草，杀草效果可达90～100%，杂草鲜重减退率达95%以上。

Applying one gram effective amount per mu can control and strongly inhibit more than twenty annual and perennial dicot weeds , with weed control effect up to 90 ~ 100 % and weed green weight decrease up to over 95 % .

结果发现，多年生的菊科、蓼科、葡萄科和部分多年生禾本科杂草对草甘膦具有较强的耐药性，同种杂草成株的耐药程度明显高于苗期。

The results showed that the perennial weeds of Compositae , Vitaceae and Gramineae had high glyphosate tolerance . The tolerance of adult weeds was higher than at seedling stage .