高效液相色谱法测定20%高效氯氰菊酯·胺菊酯乳油中氯氰菊酯和胺菊酯的含量

采用高效液相色谱法 ,使用正相色谱柱 (ZORBAXRX SIL)和紫外检测器 ( 2 40nm)同时测定高效氯氰菊酯和胺菊酯。流动相为正己烷 +乙酸乙酯 ( 93+7) ,该方法的标准偏差为 0 .0 7%和 0 .0 9% ,变异系数为0 .69%和 0 .9% ,回收率为 99.1%～ 10 1.3%和 99.7%～ 10 1.2 %。     

不同药剂对天麻地下害虫的田间防治效果的评价

[目的]筛选出有效防治天麻地下害虫的药剂。[方法]将2%吡虫啉颗粒剂、1%噻虫胺颗粒剂、3%辛硫磷颗粒剂、5%二嗪磷颗粒剂、1%氟氯氰菊酯颗粒剂、2%联苯菊酯·噻虫胺颗粒剂、25%高效氯氟氰菊酯·噻虫胺微囊悬浮剂、2%噻虫胺·氟氯氰菊酯颗粒剂、5亿PIB/g甘蓝夜蛾核型多角体病毒颗粒剂、10亿孢子/g金龟子绿僵菌颗粒剂这10种药剂对天麻地下害虫进行田间试验。[结果]供试的10种药剂对天麻地下害虫都有好的防治效果，其中25%高效氯氟氰菊酯·噻虫胺微囊悬浮剂的剂量为18.0 kg/hm2时，对天麻地下害虫防治效果最好(90.13%)，产量为6.4 kg/m2，增产率为28.0%；当剂量为30.0 kg/hm2时，联苯菊酯·噻虫胺颗粒剂和2%噻虫胺·氟氯氰菊酯颗粒剂对天麻地下害虫防治效果次之，产量分别为6.0、6.2 kg/m2，增产率分别为20.0%和24.0%。其他药剂对天麻地下害虫的防治效果均较差。[结论]25%高效氯氟氰菊酯·噻虫胺微囊悬浮剂是防治天麻地下害虫的理想药剂，不仅能有效防治天麻地下害虫的为害，还可以提高其产量。     

WHO推荐可用于防治卫生害虫及其媒介的农药名单

一、菊酯类 (共 2 5个 )1.氯氰菊酯ｃｙｐｅｒｍｅｔｈｒｉｎ2 .顺式氯氰菊酯ａｌｐｈａ -ｃｙｐｅｒｍｅｔｈｒｉｎ3 .Ｚｅｔａ -氯氰菊酯ｚｅｔａ -ｃｙｐｅｒｍｅｔｈｒｉｎ4.溴氰菊酯ｄｅｌｔａｍｅｔｈｒｉｎ5 .氯菊酯 ｐｅｒｍｅｔｈｒｉｎ6.胺菊酯ｔｅｔｒａｍｅｔｈｒｉｎ7.右旋胺菊酯ｄ -ｔｅｔｒａｍｅｔｈｒｉｎ8.氰戊菊酯ｆｅｎｖａｌｅｒａｔｅ9.Ｓ -氰戊菊酯ｅｓｆｅｎｖａｌｅｒａｔｅ10 .醚菊酯ｅｔｏｆｅｎｐｒｏｘ11.联苯菊酯ｂｉｆｅｎｔｈｒｉｎ12 .炔丙菊酯 ｐｒａｌｌｅｔｈｒｉｎ13 .四氟苯菊酯ｔｒａｎｓｆｌｕｔｈ…     

多种菊酯类农药在茶叶中的残留量分析方法研究

采用SPBTM- 6 0 8(30m× 0 .2 5mm× 0 .2 5 μm)毛细管柱为分离柱 ,ECD检测 ,测定了茶叶中甲氰菊酯、功夫菊酯、氟氯氰菊酯、氯菊酯、氯氰菊酯、氰戊菊酯和溴氰菊酯等的残留。本方法对 7种农药的回收率范围为 85 .90 %～ 92 .5 3% ,变异系数为 1.10 %～ 7.0 5 % ,最小检出量为 0 .4～ 1.0×10 - 1 1 g。     

气雾杀虫剂的气相色谱分析

采用气相色谱法,选用４％ＳＥ３０＋４％ＯＶ１０１的填充柱,以邻苯二甲酸二戊酯为内标,在２３０℃柱温下,用ＦＩＤ检测器对气雾杀虫剂的胺菊酯,氯菊酯和氯氰菊酯进行定量分析。该法的线性相关系数分别为：胺菊酯ｒ＝０．９９９８,氯菊酯ｒ＝０．９９５０氯氰菊酯ｒ＝０．９９９９;该法的标准偏差分别为：胺菊酯０．０７３,氯菊酯０．０２８,氯氰菊酯０．０１１。     

5%氯氟醚菊酯·高效氟氯氰菊酯悬浮剂正相高效液相色谱分析

建立了高效液相色谱法同时测定5%氯氟醚菊酯·高效氟氯氰菊酯悬浮剂中有效成分的分析方法。采用内装LunaSilica填充物的不锈钢色谱柱和紫外可变波长检测器,以正己烷+乙酸乙酯为流动相,在270nm波长下同时测定试样中氯氟醚菊酯和高效氟氯氰菊酯的含量。分析结果表明,氯氟醚菊酯和高效氟氯氰菊酯的标准偏差分别为0.023和0.040,变异系数分别为2.21%和0.97%,平均回收率分别为99.18%和99.37%。该方法具有较高的精密度与准确度,操作简便,分离效果好。     

20种药剂对苹果黄蚜室内毒力测定及安全性评价

通过20种药剂对苹果黄蚜室内毒力测定及对脊椎动物选择毒性比较表明:氯噻啉表现出了对苹果黄蚜极高的活性,高效氯氟氰菊酯、氟氯氰菊酯和高效氯氰菊酯次之,乙酰甲胺磷、毒死蜱、氟硅菊酯对苹果黄蚜活性最低;氯噻啉对苹果黄蚜具有极高的选择性,其次为氟氯氰菊酯、烯啶虫胺、高效氯氰菊酯、高效氯氟氰菊酯等,毒死蜱、三唑磷、甲胺磷等药剂的选择性则明显较差.综合试验结果及在田间观察,菊酯类农药杀伤天敌比较严重,推荐防治苹果黄蚜药剂为氯噻啉、烯啶虫胺、吡虫啉、啶虫脒等.     

正相色谱法分析菊酯类微乳剂

[目的]建立菊酯类微乳剂的正相色谱法分析,分别对氯氰菊酯、高效氯氰菊酯、高效氯氟氰菊酯微乳剂进行分析。[方法]采用无水硫酸钠为干燥剂,通过正相色谱法对样品进行分离和定量检测,外标法定量。[结果]氯氰菊酯、高效氯氰菊酯、高效氯氟氰菊酯5次平行测定的标准偏差分别为±0.03、±0.05和±0.03,回收率分别为95.9%~102.0%、98.5%~101.0%、97.9%~102.2%。[结论]该方法操作简单,准确度和精密度高,能够满足菊酯类微乳剂农药产品有效成分的检测。     

0.4%氯菊酯·氯氰菊酯水乳剂的液相色谱分析

介绍了用高效液相色谱法,采用Hypersil SiO2色谱柱,以异辛烷+1,4-二氧六环为流动相,在230nm下检测,外标法定量分析氯菊酯和氯氰菊酯的方法.方法的标准偏差分别为0.0084和0.0084,变异系数分别为4.0%和3.8%,回收率分别为99.31%～100.36%和98.32%～100.09%.     

6%高效氯氰菊酯·氯菊酯水乳剂的高效液相色谱分析

采用高效液相色谱法,使用正相硅胶柱和可变波长紫外检测器,以石油醚-乙酸乙酯混合溶剂为流动相,用外标法对6%高效氯氰菊酯·氯菊酯混配制剂中的有效成分进行同柱定量分析.方法的标准偏差分别为0.038、0.020,变异系数分别为1.35%、1.22%,平均回收率均为99.0%.     

Insect antifeedant properties of anthranoids from the genusVismia

Vismiones and ferruginins, representatives of a new class of lypophilic anthranoids from the genusVismia were found to inhibit feeding in larvae of species ofSpodoptera, Heliothis, and inLocusta migratoria.     

Methyl 2,4,6-decatrienoates Attract Stink Bugs and Tachinid Parasitoids

Halyomorpha halys (Stål) (Pentatomidae), called the brown marmorated stink bug (BMSB), is a newly invasive species in the eastern USA that is rapidly spreading from the original point of establishment in Allentown, PA. In its native range, the BMSB is reportedly attracted to methyl (E,E,Z)-2,4,6-decatrienoate, the male-produced pheromone of another pentatomid common in eastern Asia, Plautia stali Scott. In North America, Thyanta spp. are the only pentatomids known to produce methyl 2,4,6-decatrienoate [the (E,Z,Z)-isomer] as part of their pheromones. Methyl 2,4,6-decatrienoates were field-tested in Maryland to monitor the spread of the BMSB and to explore the possibility that Thyanta spp. are an alternate host for parasitic tachinid flies that use stink bug pheromones as host-finding kairomones. Here we report the first captures of adult and nymph BMSBs in traps baited with methyl (E,E,Z)-2,4,6-decatrienoate in central Maryland and present data verifying that the tachinid, Euclytia flava (Townsend), exploits methyl (E,Z,Z)-2,4,6-decatrienoate as a kairomone. We also report the unexpected finding that various isomers of methyl 2,4,6-decatrienoate attract Acrosternum hilare (Say), although this bug apparently does not produce methyl decatrienoates. Other stink bugs and tachinids native to North America were also attracted to methyl 2,4,6-decatrienoates. These data indicate there are Heteroptera in North America in addition to Thyanta spp. that probably use methyl 2,4,6-decatrienoates as pheromones. The evidence that some pentatomids exploit the pheromones of other true bugs as kairomones to find food or to congregate as a passive defense against tachinid parasitism is discussed.     

2005～2006年国外塑料工业进展

收集了2005年7月～2006年6月国外塑料工业的相关资料，介绍了2005—2006年国外塑料工业的发展情况。提供了世界塑料产量、消费量及全球各类树脂生产量以及各国塑料制品的进出口情况。作为对比，介绍了中国塑料的生产情况。按通用热塑性树脂（聚乙烯、聚丙烯、聚苯乙烯、聚氯乙烯、ABS树脂）、工程塑料（聚酰胺、聚碳酸酯、聚甲醛、热塑性聚酯、聚苯醚）、通用热固性树脂（酚醛、聚氨酯、不饱和树脂、环氧树脂）、特种工程塑料（聚苯硫醚、液晶聚合物、聚醚醚酮）的品种顺序，对树脂的产量、消费量、供需状况及合成工艺、产品开发、树脂品种的延伸及应用的扩展作了详细的介绍。     

2007～2008年世界塑料工业进展

收集了2007年7月～2008年6月世界塑料工业的相关资料,介绍了2007～2008年国外塑料工业的发展情况,提供了世界塑料产量、消费量及全球各类树脂的需求量及产能情况.按通用热塑性树脂(聚乙烯、聚丙烯、聚苯乙烯、聚氯乙烯、ABS树脂)、工程塑料(尼龙、聚碳酸酯、聚甲醛、热塑性聚酯、聚苯醚)、特种工程塑料(聚苯·硫醚、液晶聚合物、聚醚醚酮)、通用热固性树脂(酚醛、聚氨酯、不饱和聚酯树脂、环氧树脂)不同品种的顺序,对树脂的产量、消费量、供需状况及合成工艺、产品应用开发、树脂品种的延伸及应用的进一步扩展等技术作了详细介绍.     

Inorganic/organic nanocomposite coatings: The next step in coating performance

Inorganic/organic hybrid materials have considerable promise and are beginning to become a major area of research for many coating usages, including abrasion and corrosion resistance. Our primary approach is to prepare the inorganic phase in situ within the film formation process of the organic phase. The inorganic phase is introduced via sol-gel chemistry into a thermosetting organic phase. By this method, the size, periodicity, spatial positioning, and density of the inorganic phase can be controlled. An important aspect of the inorganic/organic hybrid materials is the coupling agent. The initial task of the coupling agent is to provide uniform mixing of the oligomeric organic phase with the sol-gel precursors, which are otherwise immiscible. UV-curable inorganic/organic hybrid systems have the advantages of a rapid cure and the ability to be used on heat sensitive substrates such as molded plastics. Also, it is possible to have better control of the growth of the inorganic phase using UV curing. It is our ultimate goal to completely separate the curing of inorganic and organic phases to gain complete control over the morphology, and hence optimization of “all” the coating properties. Thus far, it has been found that concomitant UV curing of the inorganic and organic phases using titanium sol-gel precursors afforded nanocomposite coatings which completely block the substrate from UV light while maintaining a transparent to visible light. Also, it has been found that the morphology of the inorganic phase is highly dependent on the concentration and reactivity of the coupling agent. Presented at the 82nd Annual Meeting of the Federation of Societies for Coatings Technology, October 27–29, 2004, in Chicago, IL.     

Ethanol and (−)-α-Pinene: Attractant Kairomones for Some Large Wood-Boring Beetles in Southeastern USA

Ethanol and α-pinene were tested as attractants for large wood-boring pine beetles in Alabama, Florida, Georgia, North Carolina, and South Carolina in 2002–2004. Multiple-funnel traps baited with (−)-α-pinene (released at about 2 g/d at 25–28°C) were attractive to the following Cerambycidae: Acanthocinus nodosus, A. obsoletus, Arhopalus rusticus nubilus, Asemum striatum, Monochamus titillator, Prionus pocularis, Xylotrechus integer, and X. sagittatus sagittatus. Buprestis lineata (Buprestidae), Alaus myops (Elateridae), and Hylobius pales and Pachylobius picivorus (Curculionidae) were also attracted to traps baited with (−)-α-pinene. In many locations, ethanol synergized attraction of the cerambycids Acanthocinus nodosus, A. obsoletus, Arhopalus r. nubilus, Monochamus titillator, and Xylotrechus s. sagittatus (but not Asemum striatum, Prionus pocularis, or Xylotrechus integer) to traps baited with (−)-α-pinene. Similarly, attraction of Alaus myops, Hylobius pales, and Pachylobius picivorus (but not Buprestis lineata) to traps baited with (−)-α-pinene was synergized by ethanol. These results provide support for the use of traps baited with ethanol and (−)-α-pinene to detect and monitor common large wood-boring beetles from the southeastern region of the USA at ports-of-entry in other countries, as well as forested areas in the USA.