摘要
室内采用叶碟法,研究苍耳(Xanthium sibiricumPetril)等8种药用植物乙醇提取物对小菜蛾(Plutel-la xylostella)的拒食和产卵忌避活性。结果表明,苍耳(果实)、雷公藤(根)和商陆(根)乙醇提取物对小菜蛾4龄幼虫的取食均有较强的抑制作用,选择性拒食率分别为86.16%、49.06%和43.82%;非选择性拒食效果仍以苍耳(果实)提取物最好,达45.23%。选择性产卵忌避率以雷公藤(根)提取物为最高(69.52%),其次是苍耳(果实)和山苍树(枝叶)提取物,分别为62.50%和57.72%,雷公藤(根)、商陆(根)、窃衣(茎叶)和苍耳(果实)的非选择性产卵忌避作用均在77%以上。苍耳和雷公藤提取物在对小菜蛾的拒食和产卵忌避的各测试中,均表现较强活性。
Effect of the antifeedant and oviposition deterrent of alcohol extracts from Xanthium sibiricum and other medicinal plants against diamondback moth （ DBM, Plutella xylostella） were investigated by using leaf-disc method in laboratory. The extracts from X. sibiricum （ fruit）, Tripterygium wilfordii （root） and Phytolacca acinosa （root） showed significant antifeedant effect on the 4th instar larvae of DBM ,with the choice-antifeedant rate of 86.16 % ,49.06 % and 43.82 % ,respectively. Meanwhile,X. sibiricum （fruit） extract showed the best antifeedant activity against DBM ,with 45.27 % of nonchoice-antifeedant rate. In the choice-test of oviposition deterrent, the extracts from T. wilfordii showed the best deterrent effect （69.52 % ） ,and the next were X. sibiricum and Litsea cubeba （stem and leaf） ,with the choice oviposition deterrent rate of 62.50 % and 57.72 %. The extracts of T. wilfordii, P. acinosa, T. scabra and X. sibiricum showed significant deterrent effect on ovipisition of DBM adult in the nonchoice-test, and their oviposition deterrent rates were more than 77 %. The results suggested that using the secondary metabolites from X. sibiric,,m and T. wilfordii as insect pest behavior regulator was possible in integrated pest management.
出处
《中国蔬菜》
北大核心
2006年第2期17-20,共4页
China Vegetables
基金
湖南科技大学博士基金(E53107)
湖南教育厅基金项目(05C336)
关键词
药用植物提取物
苍耳
小菜蛾
拒食率
产卵忌避率
Medicinal plant extracts, Xanthium sibiricum, PluteUa xylostella, Antifeedant rate, Oviposition deterrent rate
