[Objective] Taking silkworm （Bombyx mori） as the test material, the research aimed to study the toxicity effects of Euphorbiafischeriana Steud. against the insects in Lepidoptera. [ Methods ] Water extract was prepa...[Objective] Taking silkworm （Bombyx mori） as the test material, the research aimed to study the toxicity effects of Euphorbiafischeriana Steud. against the insects in Lepidoptera. [ Methods ] Water extract was prepared with fresh perennial E. fischer/ana Steud. , which was applied in silkworm with different methods including daubing the extract on silkworm back, soaking silkworm in the extract and feeding silkworm with the mulberry leaves daubed by the extract. [ Re- suits] Those silkworms whose backs were daubed with the water extract had no obvious poisoning symptom. The silkworms soaked for 1 and 3 min could be survived for about 7 d; the silkworms soaked for 5 min could be survived for about 2 d; and the silkworms soaked for 15 rain could be survived for 10 h at most. Those silk- worms fed with mulberry leaves daubed by water extract completely died after 2 d. [ Conduslons ] The water extract of E. fischer/ana Steud. had significant contact toxicity and stomach poisoning against silkworm.展开更多
笔者以早春野生狼毒大戟再生苗为材料,采用田间种植法,跟踪观察其春季生长发育特征特性,同时应用六种除草剂对狼毒大戟进行灭杀试验。试验结果表明,草甘膦异丙铵盐、乙氧氟草醚、2,4-D丁酯对狼毒大戟有明显效果,硝磺草酮对狼毒大戟有一...笔者以早春野生狼毒大戟再生苗为材料,采用田间种植法,跟踪观察其春季生长发育特征特性,同时应用六种除草剂对狼毒大戟进行灭杀试验。试验结果表明,草甘膦异丙铵盐、乙氧氟草醚、2,4-D丁酯对狼毒大戟有明显效果,硝磺草酮对狼毒大戟有一定效果,而扑草净和噻吩磺隆对狼毒大戟没有作用。狼毒大戟周边杂草中,受害的主要有灰绿藜、独行菜、葶苈、蔓委陵菜等双子叶植物,而早熟禾单子叶植物基本不受伤害。因此,在对草原上狼毒大戟进行灭除时,选择草甘膦异丙铵盐14 m L/L、乙氧氟草醚4 m L/L、2,4-D丁酯10 m L/L可达到较好效果。展开更多
基金Supported by Research Project Plan in Chengde Medical College(200925)~~
文摘[Objective] Taking silkworm （Bombyx mori） as the test material, the research aimed to study the toxicity effects of Euphorbiafischeriana Steud. against the insects in Lepidoptera. [ Methods ] Water extract was prepared with fresh perennial E. fischer/ana Steud. , which was applied in silkworm with different methods including daubing the extract on silkworm back, soaking silkworm in the extract and feeding silkworm with the mulberry leaves daubed by the extract. [ Re- suits] Those silkworms whose backs were daubed with the water extract had no obvious poisoning symptom. The silkworms soaked for 1 and 3 min could be survived for about 7 d; the silkworms soaked for 5 min could be survived for about 2 d; and the silkworms soaked for 15 rain could be survived for 10 h at most. Those silk- worms fed with mulberry leaves daubed by water extract completely died after 2 d. [ Conduslons ] The water extract of E. fischer/ana Steud. had significant contact toxicity and stomach poisoning against silkworm.
文摘笔者以早春野生狼毒大戟再生苗为材料,采用田间种植法,跟踪观察其春季生长发育特征特性,同时应用六种除草剂对狼毒大戟进行灭杀试验。试验结果表明,草甘膦异丙铵盐、乙氧氟草醚、2,4-D丁酯对狼毒大戟有明显效果,硝磺草酮对狼毒大戟有一定效果,而扑草净和噻吩磺隆对狼毒大戟没有作用。狼毒大戟周边杂草中,受害的主要有灰绿藜、独行菜、葶苈、蔓委陵菜等双子叶植物,而早熟禾单子叶植物基本不受伤害。因此,在对草原上狼毒大戟进行灭除时,选择草甘膦异丙铵盐14 m L/L、乙氧氟草醚4 m L/L、2,4-D丁酯10 m L/L可达到较好效果。
