[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
为探究银杏外种皮提取物(GBEE)对小菜蛾(Plutella xylostella)的毒杀作用,本文测定了不同溶剂GBEE对3龄小菜蛾幼虫的胃毒活性和拒食活性,及其对小菜蛾幼虫3种解毒酶活性的影响。研究结果表明,3种溶剂提取GBEE对小菜蛾幼虫均有一定毒杀作...为探究银杏外种皮提取物(GBEE)对小菜蛾(Plutella xylostella)的毒杀作用,本文测定了不同溶剂GBEE对3龄小菜蛾幼虫的胃毒活性和拒食活性,及其对小菜蛾幼虫3种解毒酶活性的影响。研究结果表明,3种溶剂提取GBEE对小菜蛾幼虫均有一定毒杀作用,其中甲醇银杏外种皮提取物对小菜蛾的24 h LC_(50)为216.884 mg/mL,48 h LC_(50)为48.781 mg/mL;12 h AFC_(50)为230.083 mg/mL,24 h AFC_(50)57.560 mg/mL。LC_(50)剂量下处理小菜蛾后,CarE、GSTs和MFO活性引导24 h降低,表现为抑制作用,之后活性诱导升高,表现为激活作用。综上所述,银杏外种皮提取物对小菜蛾具有一定的毒杀作用,主要作用方式为胃毒作用和拒食作用,CarE、GSTs和MFO 3种解毒酶活性表现为先降低后升高。展开更多
[Objective] The aim was to study the biological activity of insecticidal components of Seleng Wormwood on cabbage butterfly (Pieris rapae).[Method] With the assisted condition of microwave heating,ethanol,ethyl ethe...[Objective] The aim was to study the biological activity of insecticidal components of Seleng Wormwood on cabbage butterfly (Pieris rapae).[Method] With the assisted condition of microwave heating,ethanol,ethyl ether,water and methylbenzene were selected as solvents to extract Seleng Wormwood,and the antifeedant,stomach toxicity,contact toxicity and fumigation activities of various solvent extracts against cabbage butterfly were determined.[Result] Various solvent extracts all showed certain antifeedant,stomach toxicity,contact toxicity and fumigation activity against the larvae of cabbage butterfly,and the biological activity of ethanol extract was the strongest.[Conclusion]The results could provide reference for development and utilization of botanical pesticides of Seleng Wormwood.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.
文摘为探究银杏外种皮提取物(GBEE)对小菜蛾(Plutella xylostella)的毒杀作用,本文测定了不同溶剂GBEE对3龄小菜蛾幼虫的胃毒活性和拒食活性,及其对小菜蛾幼虫3种解毒酶活性的影响。研究结果表明,3种溶剂提取GBEE对小菜蛾幼虫均有一定毒杀作用,其中甲醇银杏外种皮提取物对小菜蛾的24 h LC_(50)为216.884 mg/mL,48 h LC_(50)为48.781 mg/mL;12 h AFC_(50)为230.083 mg/mL,24 h AFC_(50)57.560 mg/mL。LC_(50)剂量下处理小菜蛾后,CarE、GSTs和MFO活性引导24 h降低,表现为抑制作用,之后活性诱导升高,表现为激活作用。综上所述,银杏外种皮提取物对小菜蛾具有一定的毒杀作用,主要作用方式为胃毒作用和拒食作用,CarE、GSTs和MFO 3种解毒酶活性表现为先降低后升高。
基金Supported by Doctoral Research Fund of Yangtze UniversityEducational Commission of Hubei Province of China(Q200712003)~~
文摘[Objective] The aim was to study the biological activity of insecticidal components of Seleng Wormwood on cabbage butterfly (Pieris rapae).[Method] With the assisted condition of microwave heating,ethanol,ethyl ether,water and methylbenzene were selected as solvents to extract Seleng Wormwood,and the antifeedant,stomach toxicity,contact toxicity and fumigation activities of various solvent extracts against cabbage butterfly were determined.[Result] Various solvent extracts all showed certain antifeedant,stomach toxicity,contact toxicity and fumigation activity against the larvae of cabbage butterfly,and the biological activity of ethanol extract was the strongest.[Conclusion]The results could provide reference for development and utilization of botanical pesticides of Seleng Wormwood.