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10种杀虫剂对甘薯蚁象的毒力测定 总被引:1,自引:0,他引:1
《农药》2015,(10)
[目的]筛选对甘薯蚁象的高效药剂。[方法]采用浸虫、浸薯法,测试10种杀虫剂的毒力,并在盆栽试验中测定各药剂的杀虫效果和持效期。[结果]以高效氯氟氰菊酯、甲氨基阿维菌素苯甲酸盐、阿维菌素的触杀毒力最高;以甲氨基阿维菌素苯甲酸盐、辛硫磷、毒死蜱的胃毒毒力最高。盆栽试验施药后2 d,辛硫磷、毒死蜱、高效氯氟氰菊酯、高效氯氰菊酯、吡虫啉和高浓度甲氨基阿维菌素苯甲酸盐对植株的保护作用达到100%;施药后20 d,吡虫啉和高效氯氟氰菊酯各处理的防治持效期最长。[结论]辛硫磷、毒死蜱、高效氯氟氰菊酯、高效氯氰菊酯、甲氨基阿维菌素苯甲酸盐和吡虫啉对植株具有较好保护效果,吡虫啉和高效氯氟氰菊酯对植株保护作用的持效期最长。 相似文献
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[目的]筛选防治点蜂缘蝽的高效杀虫剂,明确河北省不同地区田间种群对杀虫剂的敏感性。[方法]采用食料浸渍法测定了13种杀虫剂对点蜂缘蝽的生物活性和田间种群对5种杀虫剂的敏感性。[结果]溴氰菊酯和高效氯氟氰菊酯对点蜂缘蝽2龄若虫的室内生物活性最高,LC50分别为0.25、0.94 mg/L。不同地区的点蜂缘蝽2龄若虫对高效氯氟氰菊酯和甲维盐的敏感性较高,且不同地区种群间对同一药剂的敏感性无显著差异。[结论]推荐优先选用以溴氰菊酯、高效氯氟氰菊酯等为主要成分的杀虫剂,作为防治点蜂缘蝽的应急防控药剂。 相似文献
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[目的]比较22%噻虫·高氯氟微囊悬浮-悬浮剂、21%噻虫嗪悬浮剂和25 g/L高效氯氟氰菊酯微囊悬浮剂对星天牛Anoplophora chinensis (Forster)的防治效果。[方法]通过室内点滴法和室外喷雾法比较了各药剂对天牛成虫的触杀效果和毒杀效果。[结果]22%噻虫·高氯氟微囊悬浮-悬浮剂对成虫具有更好的触杀效果和毒杀效果,分别在施药2、3 d后成虫全部死亡。[结论]22%噻虫·高氯氟微囊悬浮-悬浮剂对星天牛成虫防治效果表现出明显的增益效果,建议推广使用。 相似文献
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6种杀虫剂对花椒橘蚜的室内毒力及田间药效试验 总被引:2,自引:0,他引:2
[目的]为保证花椒产量,筛选出适于防治主要害虫的高效且安全的杀虫剂,在室内和田间测定了6种药剂对花椒橘蚜的活性.[结果]室内毒力测定结果表明:6种药剂在较低的质量浓度下对橘蚜都有较高的毒性,尤其是2%阿维菌素EC和2.5%三氟氯氰菊酯EW的活性最为显著,LC50值分别为0.21、0.35 mg/L;田间药效试验结果表明:6种药剂对花椒橘蚜有较好的防治效果,药后5d,防治效果均在90%以上.[结论]建议2%阿维菌素EC、2.5%三氟氯氰菊酯EW可优先用于花椒橘蚜的防治,其他几种药剂可间隔轮换使用. 相似文献
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高效氯氟氰菊酯微乳剂的制备及其液径尺寸 总被引:1,自引:0,他引:1
[目的]为了考察微乳剂和乳油剂型的液径(MDS)尺寸和稀释喷洒后的农药形态,使用复合乳化剂和乙酸丁酯溶剂,制备了质量分数为3.0%的高效氯氟氰菊酯微乳剂(ME).经测试,各项性能达到国家标准.[方法]用激光光散射仪研究了不同水稀释倍数对3%高效氯氟氰菊酯微乳剂的MDS、多分散指数(PDI)和Zata电位值的影响,以2.5%高效氯氟氰菊酯乳油(EC)作为对比.[结果]研究发现MDS随不同稀释倍数稍微增大,且微乳剂的MDS/小于乳油剂型.放置时间对其液径的影响显示21后微乳剂不同稀释倍数的液径均在100 nm以下.对2种剂型的30 mg/L稀释液,经喷施和干燥后进行扫描电镜观察.[结论]微乳剂形成棒状或块状结晶,晶体尺寸在几微米到十几微米范围;而2.5%高效氯氟氰菊酯乳油则形成树枝状结晶,晶体尺寸在50 μm以上,这对药效发挥不利. 相似文献
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几种药剂对黑绒鳃金龟成虫的药效评价 总被引:1,自引:0,他引:1
[目的]近年河北省太行山区黑绒鳃金龟成虫对苹果幼树为害严重,筛选其有效控制药剂十分迫切和必要.[方法]采用浸虫法和饲喂法在室内测定了8种药剂对黑绒鳃金龟的生物活性.[结果]480 g/L毒死蜱乳油、20%丁硫克百威乳油和2.5%高效氯氟氰菊酯乳油有较高的药效;进一步毒力测定结果显示:48 h胃毒毒力的LC50值分别为0.3699、0.1860、0.0498 g/L;触杀毒力为0.0379、0.0693、1.6494 g/L.[结论]以上3种药剂有较好防治效果,可用于目前黑绒鳃金龟成虫的防治. 相似文献
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苯乙烯是重要的石油化工原料。本文介绍了国内外苯乙烯生产的发展概况,合成乙苯,苯乙烯所用的催化剂种类,并就苯乙烯生产及催化剂的发展趋势提出了自己的观点。 相似文献
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《国际聚合物材料杂志》2012,61(1-4):113-122
Abstract Kinetics and mechanisms of oxidation of 6 acetals by molecular oxygen and ozone in liquid phase have been studied. Reaction with molecular oxygen (70°C, 15–16 hr) leads to the formation monoethers of the corresponding glycols with 68–90% selectivity. Salts of metals and complexes with crown-ethers have increased the reaction rate significally. Ozone have reacted with acetals with formation similar products. The mechanisms of intermediate stages have been proposed. 相似文献
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The variation of the Au 4f binding energy of Au clusters with the cluster size has been established by measuring the binding energies of clusters whose size distributions were independently determined by HREM and STM. The binding energy increases significantly when the cluster size is less than 2 nm. Au-Cu bimetallic clusters of the composition Cu3Au have been deposited for the first time on carbon substrates. The shifts in the core level binding energies of the bimetallic clusters show the effect of alloying in the case of large clusters, but show effects of both alloying and cluster size in the case of the small clusters. The interaction of CO with Cu3Au clusters is stronger than with a bulk Cu metal. The interaction of CO with small Cu clusters also seems to be stronger than with bulk Cu or with large Cu clusters. 相似文献
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对用甘油锌作光稳定剂的光稳定作用进行了测试,并与光稳定剂NBC,BZ进行了比较。研究了甘油锌,NBC和BZ与双酚A的复配效果。研究结果表明,甘油锌是一种性能优良的光稳定剂。 相似文献
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责任是人应主动承担的角色义务和对其因过失所造成后果应承担的责罚.有两层涵义:一是义务;二是后果.责任心是个体自觉做好分内事务和履行道德义务的心理倾向,是个性心理品质成分中自我特征维度上的重要内容.责任心具有两个方面的涵义:一是角色分内职责;二是角色道德义务.责任心是一种通过责任认知、责任个性和责任适应的动态形式表现出来的静态品质,责任心是责任心过程结构与责任心关系结构相互制约、相互影响的统一体. 相似文献
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Antioxidative activity and phenolic composition of pilot-plant and commercial extracts of sage and rosemary 总被引:5,自引:0,他引:5
Marie-Elisabeth Cuvelier Hubert Richard Claudette Berset 《Journal of the American Oil Chemists' Society》1996,73(5):645-652
Eight sage (Salvia officinalis) and twenty-four rosemary (Rosmarinus officinalis) extracts, originating from pilot-plant or commercial sources, had different antioxidative activities as measured by accelerated
autoxidation of methyl linoleate. Twenty-seven compounds were characterized in the Labiatae family extracts by high-performance
liquid chromatography (HPLC) coupled with mass spectrometry, equipped with an atmospheric pressure chemical ionization interface,
and by HPLC coupled with a photodiode array spectrophotometer. Twenty-two compounds were identified, including phenolic acids,
carnosol derivatives, and flavonoids. The extracts showed great variation in their HPLC profiles, and no correlation was apparent
between their antioxidative efficiency and their composition, in twenty specific phenols. Data indicated that the most effective
compounds were carnosol, rosmarinic acid, and carnosic acid, followed by caffeic acid, rosmanol, rosmadial, genkwanin, and
cirsimaritin. 相似文献