查询词典 herbicidal

Preliminary bioassay showed that most of title compounds had better herbicidal activity,for example,5a,5b,5c,5e,5f and 5g exhibited more than 80% inhibition to broad-leaved weeds,such as Abutilon theophrasti,Chenopodium album L.,Amaranth...

初步生物活性测定结果表明，该类化合物对阔叶杂草具有较好的芽后除草活性，如5 a、5b、5 c、5 e、5 f、5g等化合物在75 g/hm2剂量下，茎叶处理对苘麻、藜、凹头苋等阔叶杂草的抑制率达80%以上。

Preliminary bioassay showed that most of title compounds had good herbicidal activity, for example, 9a, 9b, 9c, 9f, 9g and 9h exhibited more than 90% inhibition aganist dicotyledon weeds, such as Abutilon theophrasti Medic and Amaranthus spinosus at an active ingredient 75 g/hm2 in post-emergence treatment.

初步生物活性测定结果表明，该类化合物具有一定的除草活性，如9a， 9b， 9c， 9f， 9g和9h在有效成分75 g/hm2剂量下，茎叶处理对苘麻、刺苋等双子叶杂草的抑制率达90%以上。

Quantitative structure-activity relationship studies showed that when the test grass was rape, their herbicidal activity was mainly related with substituent molar refractivity; when the test grass was barnyard grass, their herbicidal activity was mainly related with the electronic parameters of the substituents at the para-position of benzene ring.

定量的结构与活性关系研究表明，当作用对象为油菜时，化合物的活性可能主要与取代基R的摩尔分子折射常数有关；当作用对象为稗草时，化合物的活性可能主要与取代基R的电性参数有关。1-位为氢时，有利于对油菜生长的抑制；1-位为甲基时，有利于对稗草生长的抑制。

Using six monocotyledonous and dicotyldonous weeds and the plant shoots and soils as materials, all the compounds were tested indoors on the herbicidal activities. The results showed that one or two compounds have a definite herbicidal activity.

2所有化合物在室内分别对单子叶和双子叶的六种杂草，采用茎叶和土壤两种处理方法，进行了除草活性试验，结果有1—2个新化合物显示一定的除草活性。

The results of bioassay suggest that 2-methylthio-6-methyl-4-substituted pyrimidine and 4, 6-dimethoxy-2-substituted pyrimidine derivatives show herbicidal activity. In these target compounds, 4, 6-dimethoxy-2-substituted pyrimidine benzylamine and 4, 6-dimethoxy-2-Substituted pyrimidine benzylidene amine exhibit good herbicidal activity, and the herbicidal will be affected by the substituents in the benzene ring.

对分子库中的目标分子进行了生物活性筛选研究，发现其中的2-甲硫基-6-甲基-4-取代嘧啶衍生物和4，6-二甲氧基-2-取代嘧啶类化合物显示出除草活性，其中4，6-二甲氧基-2-取代嘧啶苄胺类化合物和4，6-二甲氧基-2-取代嘧啶亚苄胺类化合物具有较好的除草活性，而且其活性和苯环上的取代基有关。

The pyrimidine lead compound is obtained via herbicidal activity screen. The optimization of lead compound leads to find the good pyrimidine benzylamine candidates with highly effective herbicidal activity. The novel herbicidal mechanism of pyrimidine benzylamine is put forward. N-(2-bromophenyl)-2-(4, 6-dimethoxypyrimidin-2-yloxy)benzylamine (103-1) has potential as a new selective post-emergent herbicide in oilseed rape.

通过系统的研究工作，发现了具有除草活性的嘧啶先导结构，经结构优化，筛选出具有高除草活性的嘧啶苄胺类优选结构，发现并提出了此类化合物的除草作用新机理，最终经田间试验证实了N-(2-溴苯基)-2-(4，6-二甲氧基-2-嘧啶氧基)苄胺(103-1)可作为超高效油菜田除草剂进行工业性的研究与开发。

The results of the herbicidal effects study display that 1,4-dioxoquinoxaline formaldehyde-salicylic aldehyde dihydrazone and 1,4-dioxoquinoxaline formaldehyde acetone dihydrazone have obvious herbicidal activity.

研究结果表明1，4-二氧喹喔啉-2-甲醛-水杨醛双腙和1，4-二氧喹喔啉-2-甲醛-丙酮双腙表现较明显的活性，在500mg/L浓度时对稗草的株防效分别为51.3%和55.0%；对油菜株防效较弱，分别只有33.5%和17.5%。

Because of the herbicidal activities found in all the acrylate derivatives(3),they may be regarded as the lead herbicidal compounds to study further.

所合成的目标化合物3在2000g ai/hm2的剂量下均具有一定的除草活性，可作为除草活性的新型先导化合物供进一步优化研究。

More detailed in vivo and in vitro herbicidal activity was determined for 01806, 01808. The results showed that they have excellent herbicidal activity, and they could find use in soybean and wheat field.

对初期发现的两个有一定苗头的化合物01806和01808进行详细的体外和体内除草活性测试，大幅改进了合成方法，发现二者都是超高效除草剂，首次提出其适用作物及用量，并已申请专利。

The Botrytis cinerea BC1 isolate from Tagetes patula has been studied on the fubgicidal, herbicidal activity and cultural condition, isolation and identification of herbicidal components in this paper.

本论文是以花卉万寿菊上分离得到的灰葡萄孢BC1 菌株为出发菌株，研究了其代谢产物的杀菌、除草活性及培养条件，并对其除草活性成分进行了分离和结构解析。

Neither the killing of Mr Zarqawi nor any breakthrough on the political front will stop the insurgency and the fratricidal murders in their tracks.

在对危险的南部地区访问时，他斥责什叶派民兵领导人对中央集权的挑衅行为。

In fact,I've got him on the satellite mobile right now.

实际上 我们已接通卫星可视电话了