查询词典 Pieris

The benzene fraction of the liquid-liquid partitioning was found to be the most active against the larvae of Plutella xylostella and Pieris rapae, with the rate of antifeeding, at ×50 dilution, of 97.7%and 97.3%, respectively, after 12 h exposure.

液—液分配法中，苯提取物的拒食活性最高，在50倍稀释浓度下，小菜蛾Plutella xylostella和菜粉蝶Pieris rapae幼虫对其拒食率分别为97.7%和97.3%。

Effects of control Plutella xylostella,Pieris rapae were 75.9%～83.5% and 46.9%～57.1% of Myzus persicae was controlled at same time.Rectify effect of control Aphis me...

在低浓度时对天敌生物影响更小，是高毒高残留农药理想的替代品种，可以大面积推广应用。

Matrine had broad-spectrum killing pesticide activity to acaridae, Pieris rapae L.

苦参碱具有广谱杀虫活性，对叶螨、菜青虫、蚜虫均具有活性。

New research on the virus enhance the Bt pesticide formulations to improve efficiency than Bt 15 to 20 percent, faster effect for 12 hours, killing spectrum from DBM, such as Pieris rapae mainly extended to rice stem borers, Spodoptera litura, beet armyworm, etc. Important pests, and declared a national invention patents.

研究的新型生物农药病毒增强Bt较Bt制剂增效15~20%，作用速度加快了12小时，杀虫谱由小菜蛾、菜青虫等为主扩展到水稻螟虫、斜纹夜蛾、甜菜夜蛾等重要害虫，并申报了国家发明专利。

The experiment was to measure the controlling effect with the extracts from Meliaazedrach Linn,Artemisia annua Linn and Ginkgo biloba on Pieris rapae in the field.

引言在高新科学技术发展的今日，农业害虫的防治概念已发生了变化，这种变化就是要从大量的快速杀死害虫转变为控制害虫种群增长，综合考虑生态效益、环境质量和长远的经济效益。

Of applications to clean ·马 Ruyou Caiqingchong Pieris rapae, the field of medicinal test, the test results showed : 20% of clean ·马 Ruyou Caiqingchong have good preventing and controlling effect, albeit one day after 1500 Beiye, 2000 Beiye, 2500 amounted to 96.45% Beiye-effective, 91.94%,89.45%; medicine after three days of anti-drug effect after seven days, respectively, to 99.02%,95.85%,92.94%; 98.56%,92.62,87.42% respectively.

应用20%氰·马乳油防治菜青虫Pieris rapae的田间药效试验，试验结果表明：20%氰·马乳油对菜青虫具有良好的防治效果，施药后1天1500倍液，2000倍液，2500倍液防效达96.45%，91.94%，89.45%；药后3天的防效分别达99.02%，95.85%，92.94%；药后7天分别为98.56%，92.62，87.42%。

Based on a systematic field investigation and laboratory experiments, the structures of arthropod communities and the evalution of dominant predatory enemies in cabbage fields of different seasons were studied. The main results were as follows:1 The structures and their dynamics of arthropod communities in cabbage fields1.1 Species composition and population dynamics of each species of the arthropodcommunities in the cabbage fieldsThe research results showed that the occurrence of Pieris rapae in spring cabbage fields was relatively grave.

本文在田间系统调查和室内试验的基础上，对不同季节甘蓝田节肢动物群落结构及捕食性天敌优势种的评价进行了研究，主要结果如下：1甘蓝田节肢动物群落结构及其动态1.1节肢动物群落物种构成和各种群数量动态研究结果表明，春甘蓝田菜青虫的发生比较严重，菜青虫在调查期间种群数量呈上升趋势，5月初高峰期平均每株甘蓝接近20头；菜蚜与小菜蛾的发生相对较轻，菜蚜在5月中旬有个明显高峰。

The antifeedant activity of extract from Heynea trijuga against Pieris rapae larvae,and AshE activity and proteases activity of the highest antifeedant activity of H.

测试了海木提取物对菜青虫幼虫的拒食活性，并对拒食活性高的部分进行了乙酰胆碱酯酶活性、蛋白水解酶活性等测定。

The occurrence of Pieris rapae was significantly lighter in autumn cabbage fields than in spring cabbage fields, but the occurrence of Lipaphis erysimi was relatively grave, which rose steadily during the investigation period from October 9 to November 5, until the cabbage was ripe. In 13 species of predatory enemies there were 3 species of predatory insects and 10 species of spiders.

但菜青虫的发生量较春季明显较轻；菜蚜发生较重，在10月9日至11月5日的整个(来源：Ae8BC论文网www.abclunwen.com)调查过程中是稳步上升，由于该年秋季气温较高雨水较少有利于菜蚜的发生，直到甘蓝成熟其发生量均较大。

The field tests indicated that: The lowest effective dosage of the gra-nulosis virus from Pieris brassicae in the control of the small white butterfly, Artogeia rapae was in a range of 2.3 × 1010- 3.4 × 1010 GIB/mu.

田同试验结果表明：大菜粉蝶颗粒体病毒防治甘蓝地上菜粉蝶幼虫的最低有效剂量在2.3×10~(10)～3.4×10~(10)颗粒体/亩之间；病毒的喷布应在寄主卵与低龄幼虫的高峰期进行，春夏季以在田间寄主卵孵化率近20％时使用为宜。

A historical region of southwest France between the Pyrenees and the Garonne River. The duchy of Aquitaine was joined with France after the marriage of Eleanor of Aquitaine to King Louis VII in1137, but its possession was disputed after her subsequent marriage to Henry II of England.

阿基坦法国西南部一个历史地区，位于比利牛斯山和加隆河之间，在1137年阿基坦的埃莉诺与国王路易斯七世结婚之后阿基坦公国加入法国，但当她再嫁英国亨利二世后，其归属权便受到争议

There are moments when I look at the smiling , happy faces of my expectant staff and wonder how they will cope when confronted by an outraged housemaster along with an unrepentant and recalcitrant bleached blond teenager in 18 years ' time .

有时候，我看着那些满怀期待的员工微笑，幸福的脸，想着当他们遇到一位愤怒的宿舍管理员和一位不知悔改，叛逆，而且将头发染成白色的18岁少年时，他们会如何处理。