红树植物提取物的杀螨活性试验

采用叶片残毒法测定了16种红树植物甲醇提取物对柑橘红蜘蛛的杀螨活性。结果表明,海芒果、苦槛蓝、苦榔树和黄槿对柑橘红蜘蛛雌成螨的触杀活性高,药液质量浓度为10g/L时,24h的校正死亡率达90%以上;榄李、海漆和水黄皮有中等杀螨活性,校正死亡率为66.90%～74.19%;其余植物的杀螨活性低,校正死亡率在50%以下。海芒果、苦槛蓝、苦榔树、黄槿和榄李对雌成螨的致死中浓度(LC50值)分别为1.8416、2.8757、2.9218、4.9325、6.5728g/L。红树植物提取物对柑橘红蜘蛛卵也有触杀活性,其中苦槛蓝、苦榔树、木榄、海漆、老鼠簕、海芒果、白骨壤和草海桐的杀卵活性高,药液质量浓度为10g/L时,校正死亡率在80%以上。     

24%螺虫乙酯SC防治柑橘木虱、粉虱等4种主要害虫田间药效试验

[目的]为探明螺虫乙酯对柑橘主要害虫的防治效果,于2010年5—8月进行了柑橘粉虱、潜叶蛾、木虱、红蜘蛛的田间药效试验。[结果]24%螺虫乙酯SC 1000 mg/L对柑橘粉虱药后1、3 d的防效高于90.1%;1 000 mg/L对柑橘潜叶蛾药后4 d的防效低于30.2%;对柑橘木虱防效不稳定,在5—6月2次试验中,只有500 mg/L对柑橘木虱防效高(药后24 h防效>95%),在8月的试验中,333、500、1 000 mg/L药后1~15 d的防效均低于82%;500 mg/L对柑橘红蜘蛛药后1~22 d的防效为48.7%~93.9%。[结论]24%螺虫乙酯SC对柑橘粉虱、红蜘蛛防效好;对木虱防效不稳定;对潜叶蛾防效差。     

Interconnected Approaches to Sustainable Architecture

Is minimising the negative effects of human activity on people and the planet enough, or can we aim even higher? Guest-Editor Terri Peters introduces the concept of superarchitecture: architecture that is not merely sustainable, but offers positive benefits for both human wellbeing and the environment. As demonstrated by the three international case studies she presents, it is applicable not only to healthcare architecture, but also to the spaces in which we live and work, and the wider urban realm. At its heart is a deep connection with nature.