摘要
在有近紫外光照下，万寿菊根甲醇浸提物、根甲醇索氏提取物、全株乙醇浸提物、花石油醚萃取物和α－三连噻吩对白纹伊蚊（Ａｅｄｅｓａｌｂｏｐｉｃｔｕｓ）４龄幼虫的毒力分别是无近紫外光照下的７３８、１０４、１６６倍、大于５２和１０１．７倍；通过采用高效液相色谱法（ＨＰＬＣ）测定上述提取物中α－三连噻吩（Ａｌｐｈａ－ｔｅｒｔｈｉｅｎｙｌ）的含量，证明除根甲醇索氏提取物外，其它提取物的光活化毒力基本上依赖于所含的α－三连噻吩；模拟室外防治试验结果表明。
he median lethal concentrations of methanol extracts obtained by maceration method and by Sohxlet method from the root,the ethanol extract from the whole plant,the petroleum ether extract from the flower of Tagetes erecta and alpha-terthienyl to the 4th instar larvae of Aedes albopictus,in the absence of near-UV light,were 73.8、10.4、16.6、>5.2 and 101.7 times of those in the presence of near-UV light,respectively.The contents of alpha-terthienyl in the extracts were investigated by using reverse-phase HPLC and results showed that the phototoxicities of the extracts were generally due to the alpha-terthienyl contained in them.The results in the simulated pond experiment showed that effective control of the larvae of Aedes albopictus was achieved with application of 12 mg/L methanol extract by Soxhlet method from the root.
出处
《华南农业大学学报》
CAS
CSCD
北大核心
1998年第2期8-12,共5页
Journal of South China Agricultural University
基金
广东省自然科学基金
关键词
光活化活性
万寿菊
提取物
α-三连噻吩
白纹伊蚊
photoactivated toxicity
Tagetes erecta
extracts
alpha-terthienyl
Aedes albopictus
