Objective: To assess the chemical composition and mosquito larvicidal potentials of essential oil of wild chive(Allium schoenoprasum L.) against Anopheles stephensi.Methods: In the search for an environmentally safer ...Objective: To assess the chemical composition and mosquito larvicidal potentials of essential oil of wild chive(Allium schoenoprasum L.) against Anopheles stephensi.Methods: In the search for an environmentally safer alternative mosquitoes control, the larvicidal efficacy of essential oil obtained from the leaves of Allium schoenoprasum L. against Anopheles stephensi was determined. The composition of chive essential oil was analyzed by gas chromatography–mass spectrometry. Results: In toxicity assays, the essential oil demonstrated substantial larvicidal activity against larvae of Anopheles stephensi with LC_(50) and LC_(90) values of 2.60, and 7.31 ppm after 24 h of exposure, respectively. Gas chromatography–mass spectrometry analysis of chive essential oil identified 35 components representing more than 97.31% of the total essential oil. The main constituents were sulfur compounds, including diallyl trisulfide(13.72%), 2-ethyl[1,3]dithiane(8.93%), allyl methyl trisulfide(8.77%), and trimethylene trisulfide(6.64%), respectively. Conclusions: This study demonstrated that wild chive essential oil has a rich source of eco-friendly bioactive compounds for use as a mosquito larvicide. The main reason for its extraordinary properties may be related to the high percentage of sulfur compounds.展开更多
通过对小香葱田间杂草的发生危害、除草剂控制技术和残留量分析研究表明:小香葱田间杂草有23科62种,以禾本科和菊科为主,分别占杂草发生种类的21.0%和19.4%;一年生和越年生杂草的发生量分别占全年杂草发生量的63.5%和29.7%,多年生杂草占...通过对小香葱田间杂草的发生危害、除草剂控制技术和残留量分析研究表明:小香葱田间杂草有23科62种,以禾本科和菊科为主,分别占杂草发生种类的21.0%和19.4%;一年生和越年生杂草的发生量分别占全年杂草发生量的63.5%和29.7%,多年生杂草占6.8%。5种除草剂对小香葱田杂草均有良好的防除效果,其中96%金都尔EC 1 008.0 g a.i./hm2对禾本科和阔叶杂草的防效分别达96.6%和95.8%,50%异丙隆WP 1 125.0 g a.i./hm2对禾本科和阔叶杂草的防效分别达95.7%和94.8%,其农药残留符合出口标准,而24%果尔EC 270.0 g a.i./hm2和20%使它隆EC 180.0 g a.i./hm22个除草剂的农药残留超过了日本和欧盟在蔬菜上的最大允许残留标准,不宜使用。展开更多
文摘Objective: To assess the chemical composition and mosquito larvicidal potentials of essential oil of wild chive(Allium schoenoprasum L.) against Anopheles stephensi.Methods: In the search for an environmentally safer alternative mosquitoes control, the larvicidal efficacy of essential oil obtained from the leaves of Allium schoenoprasum L. against Anopheles stephensi was determined. The composition of chive essential oil was analyzed by gas chromatography–mass spectrometry. Results: In toxicity assays, the essential oil demonstrated substantial larvicidal activity against larvae of Anopheles stephensi with LC_(50) and LC_(90) values of 2.60, and 7.31 ppm after 24 h of exposure, respectively. Gas chromatography–mass spectrometry analysis of chive essential oil identified 35 components representing more than 97.31% of the total essential oil. The main constituents were sulfur compounds, including diallyl trisulfide(13.72%), 2-ethyl[1,3]dithiane(8.93%), allyl methyl trisulfide(8.77%), and trimethylene trisulfide(6.64%), respectively. Conclusions: This study demonstrated that wild chive essential oil has a rich source of eco-friendly bioactive compounds for use as a mosquito larvicide. The main reason for its extraordinary properties may be related to the high percentage of sulfur compounds.
文摘通过对小香葱田间杂草的发生危害、除草剂控制技术和残留量分析研究表明:小香葱田间杂草有23科62种,以禾本科和菊科为主,分别占杂草发生种类的21.0%和19.4%;一年生和越年生杂草的发生量分别占全年杂草发生量的63.5%和29.7%,多年生杂草占6.8%。5种除草剂对小香葱田杂草均有良好的防除效果,其中96%金都尔EC 1 008.0 g a.i./hm2对禾本科和阔叶杂草的防效分别达96.6%和95.8%,50%异丙隆WP 1 125.0 g a.i./hm2对禾本科和阔叶杂草的防效分别达95.7%和94.8%,其农药残留符合出口标准,而24%果尔EC 270.0 g a.i./hm2和20%使它隆EC 180.0 g a.i./hm22个除草剂的农药残留超过了日本和欧盟在蔬菜上的最大允许残留标准,不宜使用。