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天然化合物蛇床子素防治草莓白粉病 总被引:10,自引:0,他引:10
60gg/ml蛇床子素在处理草莓白粉菌24h后完全抑制其分生孢子的萌发。田间小区药效试验表明,1%蛇床子素水乳剂80~125μg/ml对草莓白粉病的防效达68.7%-79.5%,对照药剂10%,苯醚甲环唑水分散粒剂100μg/ml防效达72.9%,15%三唑酮可湿性粉剂187.5μg/ml防效仅为45.6%。DMRT分析结果表明,1%蛇床子素水乳剂对草莓门粉病的防效与10%苯醚甲环唑水分散粒剂的防效相当,极显著高于15%三唑酮可湿性粉剂的防效。 相似文献
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[目的]为明确20%呋虫胺SG对棉盲蝽象的防治效果,开展了该药的田间药效试验.[结果]20%呋虫胺SG450、300、225、150 g a.i./hm2和50%马拉硫磷EC 750 mL a.i./hm2对棉盲蝽象的防效,药后ld依次为100%、80%、81.82%、75%和50%,药后3d的防效依次为100%、100%、94.29%、80.25%和46.45%;药后7d的防效依次为100%、95.15%、95%、80.11%和41.86%.[结论]20%呋虫胺SG防治棉盲蝽象具有速效、持效且对棉花安全的特点,是防治棉盲蝽象理想药剂.在中等偏轻发生年份用量为150~225 g a.i./hm2,在中等以上发生程度年份用量为225~300 g a.i./hm2. 相似文献
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枸杞黑果病是枸杞产区的主要病害.发病后造成黑花、黑蕾和黑果,使枸杞产量降低,品质变劣。为探明四种杀菌剂对枸杞黑果病的防治效果及最佳剂量,2003年对下述四种杀菌剂进行了田间药效对比试验,调查防效结果如下:20%三苯基醋酸锡WP450~281g/hm^2(以有效成分计,下同),20%氟硅唑EC21.08g/hm^21.5%噻霉酮EW16、88~21.08g/hm^2、40%氟硅唑EC450g/hm^2和70%甲基托布津WP787.5g/hm^2对枸杞黑果病防效均在88.25%以上。经LSD检验各处理间防效无显著差异。 相似文献
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苯磺隆与吡草醚混用防除麦田杂草 总被引:3,自引:0,他引:3
苯磺隆75DF9g/hm2 吡草醚2SCl50m1/hm2桶混具相加作用,对芥菜、婆婆纳株防效分别达62.2%、100%,鲜重防效分别达88.7%、96.9%。 相似文献
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在温室条件下,以进口样品做对照,研究沈阳化工研究院40%三甲苯草酮水分散粒剂对禾本科杂草的防除效果及对小麦的安全性.结果表明:看麦娘,早熟禾对三甲苯草酮很敏感,在150 g a.i./hm2剂量下防效可达90%~100%;野燕麦的敏感性次之,在150 g a.i./hm2剂量下防效达85%,在300 g a.i./hm2剂量下防效达95%;稗草对三甲苯草酮的敏感性最差,在300 g a.i./hm2剂量下防效为60%,在600 g a.i./hm2剂量下防效为90%~95%.沈阳化工研究院样品与进口样品活性和安全性基本一致. 相似文献
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大型管磨机启停时电压会波动,常规方法是采用一台液体电阻启动器来保证电机启动过程平滑、无冲击。而在小电网下,此法却不尽人意。在越南某水泥粉磨站的水泥磨主电机的供电系统中,成功地将I.L.B装置与液体电阻启动器结合起来,收到事半功倍的效果。 相似文献
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用(超)临界液相色谱法分析了单萜烯混合物。该方法操作简单、灵敏度较高、重复性好,在单萜烯的研究中有一定的参考价值。 相似文献
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介绍了湿式电滤器的工作原理以及该系统在生产中出现的工艺和电气等方面的问题,并从多方面提出了改造措施. 相似文献
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ABSTRACT: The yellow- and red-emitting CdSeS nanocrystals (NCs) synthesized through one-step organometallic synthesis method are uniformly assembled in polymethyl methacrylate (PMMA). A higher-energy emission band originates from band-edge excitonic state appeared at low temperature. With the Se dopant concentration increasing, the luminescent spectra of CdSeS NCs have a red-shifted emission peak and a shorter luminescent lifetime, which is attributed to the existence of trapping state caused by surface defect and Se dopant. CdSeS NC shows a shorter luminescence lifetime and higher energy emission peak in PMMA matrix than that in toluene, indicating that the former is more favorable to transfer energy through exciton-phonon coupling. The upconversion luminescence (UCL) is observed using 800nm femtosecond laser excitation. The pump power dependence demonstrated UCL spectra of yellow-emitting CdSeS NCs has a slope of 2.2, while that of red-emitting CdSeS NCs has a slope of 1.4. The results demonstrate that the two-photon absorption plays a dominating role when Se concentration of CdSeS NCs is lower, while phonon-assisted UCL by one-photon excitation gradually takes place with the amount of Se dopants increasing. 相似文献
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目的观察大剂量纳洛酮配合机械通气雾化戊乙奎醚救治急性有机磷中毒中间综合征(IMS)的效果。方法在内科综合治疗基础上,以大剂量纳洛酮(商品名:苏诺)配合机械通气雾化戊乙奎醚(商品名:长效托宁)救治IMS患者57例,计算病死率,并与国内外文献报道病死率进行比较。结果病死率为40.36%,明显低于国内外文献报道62.5%死亡率(P<0.05)结论:本疗法可提高抢救成功率,是救治急性有机磷中毒中间综合征的新途径,值得临床推广应用。 相似文献
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阐述了磷酸三纳生产中关键岗位工艺指标的控制及为降低产品消耗采取的主要措施。通过工艺控制与降低消耗,使产品一级品率达到了100%,纯碱消耗344kg/t(100%),烧碱消耗169mg/t(100%)。 相似文献
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Compound classes in coal liquids were investigated by thin-layer chromatography coupled with a flame ionization detector (t.l.c.-f.i.d.). Individual t.l.c. peaks for coal liquids were identified as paraffins, aromatics, polar compounds and more strongly polar compounds or asphaltenes in order of increasing Rf values by comparison with specific compounds separated previously by conventional liquid chromatography. Concentrations of compound classes for a series of samples obtained by varying the hydrogenation time were estimated and good agreement was found with the results obtained by the USBM-API 60 liquid chromatography procedure. By using the t.l.c.-f.i.d. method, the relation of distribution of compound classes to the reaction conditions of coal hydrogenation could be derived quantitatively with relative ease. 相似文献
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