查询词典 pyrethrum insecticide

Series of β-sitosterol derivative are synthesized in order to select the more effective insecticide and to study the relationship between molecular structure and insecticidal activity.

为筛选更有效的杀虫剂，探明β谷甾醇的分子结构与杀虫活性之间的关系，合成了一系列的β谷甾醇衍生物。

Chemical insecticide showed some effects on controlling the stem borer.

化学农药的使用对IR72水稻螟害控制有一定的作用，但控害效果不如TT9-4。

Influence of sublethal insecticides on the behavior of aphid could be one cause of the insecticide-induced resurgence of the pest insects.

亚致死剂量杀虫剂对桃蚜行为学上的影响可能是诱致蚜虫再猖獗的原因之一。

Dihydrosafrol is mainly used to synthesize piperonyl butoide which is a widely used insecticide synergist.

二氢黄樟油素主要用于合成高效、用途广泛的农药增效剂———胡椒基丁醚。

I produced fertilizer, plant hormone, agricultural synergist, insecticide, fungicide, herbicide six series over 100 varieties, with its reliable quality, beautifully packaged in the agricultural industry has won a very good reputation.

我公司生产的叶面肥、植物激素、农用增效剂、杀虫剂，杀菌剂、除草剂六大系列100多个品种，以其可靠的质量，精美的包装在农资行业赢得了很好的盛誉。

This results in an increasing concentration of insecticide in organismsat the higher trophic levels.

这就导致在更高营养级上的有机体中，农药的浓度增加。

We have developed new types of pesticide with broad spectrum,high efficiencyand low poison.At present,we have six TC including insecticide,weedicide,bactericide and four series intermediates used in medicine,pesticide and dyestuff.

大力发展广谱、高效、低毒的新型农药，目前已形成前后一体化产品体制，包括杀虫、除草、杀菌六大原药以及用于医药、农药和染料的四大系列的中间体产品。

The conclusion was important for making further research of insecticide plant Zanthoxylum bungeanume.

此结论对杀虫植物青花椒的进一步研究利用有重要意义。

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。

You can do some assertiveness training.

你可以进行一些自信训练。

We were well on the path to making a rear-wheel-drive global platform," says Mays."

我们正致力于建立一个后轮驱动的平台，"Mays这样说道。"