除草剂

The aim was to compare the weeding effect of several kinds of herbicides.

［目的］比较几种除草剂的除草效果。

Objective］ The aim was to compare the weeding effect of several kinds of herbicides.

［目的］比较几种除草剂的除草效果。

A white powdered poisonous trioxide of arsenic; used in manufacturing glass and as a pesticide and weed killer.

一种白色有毒的粉末状砷的三氧化物，用于制造玻璃，用作杀虫剂和除草剂。

They concluded that the farmers' soybean yield gap were due to low quality seed, no application of herbicide, chemical fertilizer, coupled with inadequate available P in soil and poor production technology.

他们指出农民大豆产量差距是由不良种子、不使用除草剂、化肥、土壤有效磷不足和生产技术不良造成的。

Imino-1, 3-thiazetidines is the basic structure of a kind ofbioactive herbicide and insecticide. Our method has advantage in synthesis highly substituted2-imino-1, 3-thiazetidines, therefore it has practical value to some extent. We also researched the reactions catalyze by active zinc dust.

提供了成四员噻吖丁啶杂环衍生物的方法。2-亚胺基-1，3-噻吖丁啶是一类具有生物活性的除草剂及杀虫剂的核心结构，我们的方法在合成多取代的2-亚胺基-1，3-噻吖丁啶方面有一定的优越性，从而具有一定的实用价值本文另一部分的工作是探讨锌粉催化的反应。

Acenaphthene: Intermediate for naphthalic acids, naphthalic anhydride and for acenaphthylene; Intermediate for dyes, soaps, pigments, pharmaceuticals, insecticide, fungicide, herbicide and plant growth hormones.

苊： 萘酸/萘酐/亚苊的中间体，染料/肥皂/颜料/药品/杀虫剂/：//，/////杀真菌剂/除草剂和植物生长激素的中间体。

Basta SL had wide weed control spectrumand it could control most weeds of Gramineae, Compositae, Amaranthaceae and Cruciferae effectively.

结论用200g/L Basta SL对茎叶进行喷雾处理能够灭除番茄地的绝大部分杂草，是一种理想的灭生性除草剂。

The comparison of the effects on the two plants indicated that Ranunculusjaponicus, Aconitum sinomontanum,Ⅰ pomoea cairica, Aconitum gymnandrum and Anaphalis lactea showed significant effects on the two plants (their M values were separately -0.87,-0.82, 0.71,-0.68 and 0.62) and consequently these five plants were hopeful to be developed into new herbicides of plant origin.

综合比较对2种植物的综合化感效应指数差异，毛茛、高乌头、五爪金龙(Ⅰpomoea cairica)、露蕊乌头和乳白香青作用效果显著（其M差值分别是：-0.87、-0.82、-0.71、-0.68和-0.62），这5种植物有望开发新型植物源除草剂。

While two herbicides had no significant effects on the growth of three cyanobacteria at low concentrations (0.01~0.001mg/L), they made damage to cells and affect cyanobacteria's growth at high concentrations (10~100mg/L). EC_(50) values of three cyanobacteria were showed below: Anabaena azollae, 3.172 mg/L; Anabaena azotic, 3.654 mg/L and Anabaena flos-aquae, 3.377mg/L Nitrogenase activities of three species also showed different tolerant capabilities to the two herbicides under 10% vol.

在低浓度(0.01~0.001mg/L)的2种除草剂的作用下，3种固氮蓝藻的生长没有受到明显的影响，而在高浓度下(10~100mg/L)，固氮蓝藻藻细胞在形态上出现受损症状，同时生长速率也受到明显的抑制。120h时，满江红鱼腥藻，水华鱼腥藻及固氮鱼腥藻的EC_(50)值分别为3.172， 3.654及3.377mg/L。

"Sometimes I ate, sometimes I didn't have food," she says, sitting in her corrugated-tin house - the equivalent of a middle-class home in Basta.

有时候，我吃了，有时候，我没有食物，她说，坐在她的瓦楞纸-田楼-相当于一个中产阶层家庭在除草剂B asta。

The split between the two groups can hardly be papered over.

这两个团体间的分歧难以掩饰。

This approach not only encourages a greater number of responses, but minimizes the likelihood of stale groupthink.

这种做法不仅鼓励了更多的反应，而且减少跟风的可能性。