[目的]明确1%苦参碱·藜芦碱水剂对枸杞瘿螨田间防治效果及适宜应用的药剂量,评价该药剂对作物的安全性。[方法]采用茎叶喷雾法检测药剂防治效果;以邓肯氏新复极差法检验差异显著性;采用药害评价法测定1%苦参碱·藜芦碱水剂对...[目的]明确1%苦参碱·藜芦碱水剂对枸杞瘿螨田间防治效果及适宜应用的药剂量,评价该药剂对作物的安全性。[方法]采用茎叶喷雾法检测药剂防治效果;以邓肯氏新复极差法检验差异显著性;采用药害评价法测定1%苦参碱·藜芦碱水剂对枸杞生长使用安全性。[结果]喷施1%苦参碱·藜芦碱水剂5 d后,剂量处理16.65 g a.i./hm2、11.10 g a.i./hm2、8.33 g a.i./hm2对枸杞瘿螨的防治效果分别为72.44%、68.93%、61.56%;10 d后对枸杞瘿螨的防治效果分别为66.59%、61.22%、55.41%。1%苦参碱·藜芦碱水剂对枸杞树的叶、花、果实均无药害产生,田间使用安全。[结论]1%苦参碱·藜芦碱水剂在枸杞瘿螨发生初期防治效果较好,建议使用剂量以11.10~16.65 g a.i./hm2为宜。试验药剂各处理对枸杞树生长安全,无药害产生,可在生产中推广应用。展开更多
为比较1%苦参碱可溶液剂、2.5%鱼藤酮乳油和5%阿维菌素乳油对水稻稻纵卷叶螟的防治效果,于2016年进行上述3种生物药剂对水稻稻纵卷叶螟的田间药效试验。结果表明,可采用1%苦参碱可溶液剂1 800 m L/hm^2、2.5%鱼藤酮乳油3 750 m L/hm^2...为比较1%苦参碱可溶液剂、2.5%鱼藤酮乳油和5%阿维菌素乳油对水稻稻纵卷叶螟的防治效果,于2016年进行上述3种生物药剂对水稻稻纵卷叶螟的田间药效试验。结果表明,可采用1%苦参碱可溶液剂1 800 m L/hm^2、2.5%鱼藤酮乳油3 750 m L/hm^2或5%阿维菌素乳油375 m L/hm^2防治稻纵卷叶螟,且各种药剂对水稻安全。展开更多
[目的]探寻既不影响生态环境又能有效控制栎黄掌舟蛾[Phalera assimilis(Bremer et Grey)]虫口数量增长的有效方法与措施.[方法]运用喷烟技术在闽粤栲林分中研究了1%苦参碱可溶性液剂(喷烟型)、1.2%烟碱·苦参碱乳油和1.8%...[目的]探寻既不影响生态环境又能有效控制栎黄掌舟蛾[Phalera assimilis(Bremer et Grey)]虫口数量增长的有效方法与措施.[方法]运用喷烟技术在闽粤栲林分中研究了1%苦参碱可溶性液剂(喷烟型)、1.2%烟碱·苦参碱乳油和1.8%阿维菌素乳油对栎黄掌舟蛾幼虫的防治效果.[结果]1.2%烟碱·苦参碱乳油、1%苦参碱可溶性液剂及1.8%阿维菌素乳油对栎黄掌舟蛾3~4龄幼虫药后4d的防治效果都达到85%以上.[结论]供试3种药剂可作为防治栎黄掌舟蛾幼虫的药剂.展开更多
AIM: To investigate the potential mechanism of Arg- Gly-Asp (RGD) peptide-labeled liposome loading oxy- matrine (OM) therapy in CCI4-induced hepatic fibrosis in rats. METHODS: We constructed a rat model of CCh- ...AIM: To investigate the potential mechanism of Arg- Gly-Asp (RGD) peptide-labeled liposome loading oxy- matrine (OM) therapy in CCI4-induced hepatic fibrosis in rats. METHODS: We constructed a rat model of CCh- induced hepatic fibrosis and treated the rats with dif- ferent formulations of OM. To evaluate the antifibrotic effect of OM, we detected levels of alkaline phospha- tase, hepatic histopathology (hematoxylin and eosin stain and Masson staining) and fibrosis-related gene expression of matrix metallopeptidase (MMP)-2, tis- sue inhibitor of metalloproteinase (TIMP)-I as well as type I procollagen via quantitative real-time poly- merase chain reaction. To detect cell viability and apop- tosis of hepatic stellate cells (HSCs), we performed 3-(4,5)-dimethylthiahiazo(-z-yl)-3,5-diphenytetrazoli- umromide assay and flow cytometry. To reinforce the combination of oxymatrine with HSCs, we constructed fluorescein-isothiocyanate-conjugated Arg-Gly-Asp peptide-labeled liposomes loading OM, and its targeting of HSCs was examined by fluorescent microscopy. RESULTS: OM attenuated CCh-induced hepatic fibro- sis, as defined by reducing serum alkaline phosphatase (344.47± 27.52 U/L vs 550.69 ± 43.78 U/L, P 〈 0.05), attenuating liver injury and improving collagen deposits (2.36% ± 0.09% vs 7.70% ±0.60%, P 〈 0.05) and downregulating fibrosis-related gene expression, that is, MMP-2, TIMP-1 and type I procollagen (P 〈 0.05). OM inhibited cell viability and induced apoptosis of HSCs in vitro. RGD promoted OM targeting of HSCs and en- hanced the therapeutic effect of OM in terms of serum alkaline phosphatase (272.51 ± 19.55 U/L vs 344.47 ± 27.52 U/L, P 〈 0.05), liver injury, collagen deposits (0.26%± 0.09% vs 2.36% ± 0.09%, P 〈 0.05) and downregulating fibrosis-related gene expression, that is, MMP-2, TIMP-1 and type I procollagen (P 〈 0.05). Moreover, in vitro assay demonstrated that RGD en- hanced the effect of OM on HSC viability and apoptosis. CONCLUSION: OM attenuated hepatic fibrosis by in- hibiting viability and inducing apoptosis of HSCs. The RGD-labeled formulation enhanced the targeting effi- ciency for HSCs and the therapeutic effect.展开更多
文摘[目的]明确1%苦参碱·藜芦碱水剂对枸杞瘿螨田间防治效果及适宜应用的药剂量,评价该药剂对作物的安全性。[方法]采用茎叶喷雾法检测药剂防治效果;以邓肯氏新复极差法检验差异显著性;采用药害评价法测定1%苦参碱·藜芦碱水剂对枸杞生长使用安全性。[结果]喷施1%苦参碱·藜芦碱水剂5 d后,剂量处理16.65 g a.i./hm2、11.10 g a.i./hm2、8.33 g a.i./hm2对枸杞瘿螨的防治效果分别为72.44%、68.93%、61.56%;10 d后对枸杞瘿螨的防治效果分别为66.59%、61.22%、55.41%。1%苦参碱·藜芦碱水剂对枸杞树的叶、花、果实均无药害产生,田间使用安全。[结论]1%苦参碱·藜芦碱水剂在枸杞瘿螨发生初期防治效果较好,建议使用剂量以11.10~16.65 g a.i./hm2为宜。试验药剂各处理对枸杞树生长安全,无药害产生,可在生产中推广应用。
文摘为比较1%苦参碱可溶液剂、2.5%鱼藤酮乳油和5%阿维菌素乳油对水稻稻纵卷叶螟的防治效果,于2016年进行上述3种生物药剂对水稻稻纵卷叶螟的田间药效试验。结果表明,可采用1%苦参碱可溶液剂1 800 m L/hm^2、2.5%鱼藤酮乳油3 750 m L/hm^2或5%阿维菌素乳油375 m L/hm^2防治稻纵卷叶螟,且各种药剂对水稻安全。
文摘[目的]探寻既不影响生态环境又能有效控制栎黄掌舟蛾[Phalera assimilis(Bremer et Grey)]虫口数量增长的有效方法与措施.[方法]运用喷烟技术在闽粤栲林分中研究了1%苦参碱可溶性液剂(喷烟型)、1.2%烟碱·苦参碱乳油和1.8%阿维菌素乳油对栎黄掌舟蛾幼虫的防治效果.[结果]1.2%烟碱·苦参碱乳油、1%苦参碱可溶性液剂及1.8%阿维菌素乳油对栎黄掌舟蛾3~4龄幼虫药后4d的防治效果都达到85%以上.[结论]供试3种药剂可作为防治栎黄掌舟蛾幼虫的药剂.
基金Supported by National Natural Science Foundation of China,No. 30600848
文摘AIM: To investigate the potential mechanism of Arg- Gly-Asp (RGD) peptide-labeled liposome loading oxy- matrine (OM) therapy in CCI4-induced hepatic fibrosis in rats. METHODS: We constructed a rat model of CCh- induced hepatic fibrosis and treated the rats with dif- ferent formulations of OM. To evaluate the antifibrotic effect of OM, we detected levels of alkaline phospha- tase, hepatic histopathology (hematoxylin and eosin stain and Masson staining) and fibrosis-related gene expression of matrix metallopeptidase (MMP)-2, tis- sue inhibitor of metalloproteinase (TIMP)-I as well as type I procollagen via quantitative real-time poly- merase chain reaction. To detect cell viability and apop- tosis of hepatic stellate cells (HSCs), we performed 3-(4,5)-dimethylthiahiazo(-z-yl)-3,5-diphenytetrazoli- umromide assay and flow cytometry. To reinforce the combination of oxymatrine with HSCs, we constructed fluorescein-isothiocyanate-conjugated Arg-Gly-Asp peptide-labeled liposomes loading OM, and its targeting of HSCs was examined by fluorescent microscopy. RESULTS: OM attenuated CCh-induced hepatic fibro- sis, as defined by reducing serum alkaline phosphatase (344.47± 27.52 U/L vs 550.69 ± 43.78 U/L, P 〈 0.05), attenuating liver injury and improving collagen deposits (2.36% ± 0.09% vs 7.70% ±0.60%, P 〈 0.05) and downregulating fibrosis-related gene expression, that is, MMP-2, TIMP-1 and type I procollagen (P 〈 0.05). OM inhibited cell viability and induced apoptosis of HSCs in vitro. RGD promoted OM targeting of HSCs and en- hanced the therapeutic effect of OM in terms of serum alkaline phosphatase (272.51 ± 19.55 U/L vs 344.47 ± 27.52 U/L, P 〈 0.05), liver injury, collagen deposits (0.26%± 0.09% vs 2.36% ± 0.09%, P 〈 0.05) and downregulating fibrosis-related gene expression, that is, MMP-2, TIMP-1 and type I procollagen (P 〈 0.05). Moreover, in vitro assay demonstrated that RGD en- hanced the effect of OM on HSC viability and apoptosis. CONCLUSION: OM attenuated hepatic fibrosis by in- hibiting viability and inducing apoptosis of HSCs. The RGD-labeled formulation enhanced the targeting effi- ciency for HSCs and the therapeutic effect.