应用干扰作用控制指数IIPC(interference index of population control),评价47种非嗜食植物乙醇提取物对褐飞虱(Nila parvata lugens)的产卵驱避效果。结果表明,处理后48h,大多数供试植物提取物(浓度均为10.0g/L)对褐飞虱均有较强的产...应用干扰作用控制指数IIPC(interference index of population control),评价47种非嗜食植物乙醇提取物对褐飞虱(Nila parvata lugens)的产卵驱避效果。结果表明,处理后48h,大多数供试植物提取物(浓度均为10.0g/L)对褐飞虱均有较强的产卵驱避作用。其中山姜(Alpinia japonica)、长叶马兜铃(Aristolochia championii)、华南毛蕨(Cyclosorus parasiticus)等8种乙醇提取物处理的稻株上未见产卵;飞机草(Chromolaena odorata)、蒜(Alliumsativum)、苍耳(Xanthium sibiricum)等9种植物的乙醇提取物的IIPC小于0.100;薇甘菊(Mikania micrantha)、马缨丹(Lantana camara)、蓖麻(Ricinus communis)等13种植物的乙醇提取物的效果达80%以上。随着作用时间的延长,产卵驱避持续效果逐渐减弱,持续驱避作用时间为3d。此外,随着提取物使用剂量的提高,产卵驱避作用增强,具有产卵驱避作用的浓度为10.0g/L以上。展开更多
应用干扰作用控制指数（interference index of population control，IIPC）分析了2种植物提取物与现代苦楝油对褐稻虱Nilaparvata lugensstal种群的联合干扰作用。结果表明：薇苷菊（Mikania micrantha）乙醇提取物、飞机草（Eupatoriu...应用干扰作用控制指数（interference index of population control，IIPC）分析了2种植物提取物与现代苦楝油对褐稻虱Nilaparvata lugensstal种群的联合干扰作用。结果表明：薇苷菊（Mikania micrantha）乙醇提取物、飞机草（Eupatorium odoratum）乙醇提取物和现代苦楝油（Trilogy）的不同组合，对褐稻虱种群具有明显的驱避效果，但其联合作用效果与组分未成正比；薇苷菊乙醇提取物与现代苦楝油或3种以上组分的联合处理，可使褐稻虱成虫产卵量降低80％以上，对若虫毒杀效果达47．41％～57．10％，其联合作用最终可将褐稻虱种群增长趋势指数（index of population trend，I）降到1．00以下，达到持续控制效果。展开更多
This study investigated the insect community diversity in coniferous mixed forest,leguminous mixed forest,native species mixed forest and pine forest of subtropical hilly land in Heshan,Guangdong Province.The results ...This study investigated the insect community diversity in coniferous mixed forest,leguminous mixed forest,native species mixed forest and pine forest of subtropical hilly land in Heshan,Guangdong Province.The results showed that the richness index(S),diversity index(H’),probability of interspecific encounter(PIE)and evenness index(J’)of insect communities in four artificial forests of Heshan hilly land were relative higher.The result reflected that the structures of insect communities in these forests were complex,relatively stable and the plants in this ecosystem were diverse.These results also demonstrated that the degraded ecosystem in this region had been restored to some extent.The indexes of insect communities in four forest forms were significantly different.The insect communities in leguminous broad-leaved mixed forest and native species mixed forest were more complicated and sable than that of pine forest and coniferous mixed forest.Therefore,leguminous broad-leaved mixed forest and native species mixed forest are much better than pine forest and coniferous mixed forest for restoration of low subtropical degraded ecosystem in Heshan.展开更多
文摘应用干扰作用控制指数IIPC(interference index of population control),评价47种非嗜食植物乙醇提取物对褐飞虱(Nila parvata lugens)的产卵驱避效果。结果表明,处理后48h,大多数供试植物提取物(浓度均为10.0g/L)对褐飞虱均有较强的产卵驱避作用。其中山姜(Alpinia japonica)、长叶马兜铃(Aristolochia championii)、华南毛蕨(Cyclosorus parasiticus)等8种乙醇提取物处理的稻株上未见产卵;飞机草(Chromolaena odorata)、蒜(Alliumsativum)、苍耳(Xanthium sibiricum)等9种植物的乙醇提取物的IIPC小于0.100;薇甘菊(Mikania micrantha)、马缨丹(Lantana camara)、蓖麻(Ricinus communis)等13种植物的乙醇提取物的效果达80%以上。随着作用时间的延长,产卵驱避持续效果逐渐减弱,持续驱避作用时间为3d。此外,随着提取物使用剂量的提高,产卵驱避作用增强,具有产卵驱避作用的浓度为10.0g/L以上。
基金National Key Technology R & D Program(2007BAD29B04)Foundation of Science and Technology of Guangdong Province(2007B020708013)Foundation of Science and Technology Thriving Ocean and Fishery(A200501G01)
文摘应用干扰作用控制指数（interference index of population control，IIPC）分析了2种植物提取物与现代苦楝油对褐稻虱Nilaparvata lugensstal种群的联合干扰作用。结果表明：薇苷菊（Mikania micrantha）乙醇提取物、飞机草（Eupatorium odoratum）乙醇提取物和现代苦楝油（Trilogy）的不同组合，对褐稻虱种群具有明显的驱避效果，但其联合作用效果与组分未成正比；薇苷菊乙醇提取物与现代苦楝油或3种以上组分的联合处理，可使褐稻虱成虫产卵量降低80％以上，对若虫毒杀效果达47．41％～57．10％，其联合作用最终可将褐稻虱种群增长趋势指数（index of population trend，I）降到1．00以下，达到持续控制效果。
文摘This study investigated the insect community diversity in coniferous mixed forest,leguminous mixed forest,native species mixed forest and pine forest of subtropical hilly land in Heshan,Guangdong Province.The results showed that the richness index(S),diversity index(H’),probability of interspecific encounter(PIE)and evenness index(J’)of insect communities in four artificial forests of Heshan hilly land were relative higher.The result reflected that the structures of insect communities in these forests were complex,relatively stable and the plants in this ecosystem were diverse.These results also demonstrated that the degraded ecosystem in this region had been restored to some extent.The indexes of insect communities in four forest forms were significantly different.The insect communities in leguminous broad-leaved mixed forest and native species mixed forest were more complicated and sable than that of pine forest and coniferous mixed forest.Therefore,leguminous broad-leaved mixed forest and native species mixed forest are much better than pine forest and coniferous mixed forest for restoration of low subtropical degraded ecosystem in Heshan.
