马铃薯茎叶和果实粗提物对粘虫触杀作用研究

采用虫体浸渍法测定了马铃薯品种庄薯3号盛花期、收获期茎叶和青果不同溶剂粗提物对粘虫5龄幼虫的触杀效果。结果表明，马铃薯青果乙酸乙酯粗提物对粘虫幼虫具有很强的触杀作用，稀释5倍液的校正死亡率可达59．5％；丙酮粗提物具有一定的触杀作用，校正死亡率为10．0％。青果的甲醇、乙醇和石油醚粗提物及盛花期、收获期茎叶的甲醇、乙醇、丙酮、石油醚和乙酸乙酯粗提物触杀作用很弱或无触杀作用。

Contact Action on Extract from Stems, Leaves and Fruits of Solanum tuberosum against Mythimna separate

The thesis conducted insecticidal activities on extracts of different polar solvents from stems and leaves of S. tuberosum （Zhuangshu 3） in blossom and harvesting time as well as fruits of S. tuberosum against 5th instar larva of Mythimna separate by immersion method. The results showed that ethyl acetate extract from green fruits had very strong contact effect against the larva, the corrected mortality was 59.5% when the extract was diluted 5 times. Acetone extract from green fruits had some extent contact effect against the larva, the corrected mortality was 10.0%. Methanol extract, ethanol extract and petroleum ether extract from green fruits and methanol extract, ethanol extract, acetone extract, petroleum ether extract and ethyl acetate extract from stems and leaves of S. tuberosum in blossom and harvesting time had very weak or no contact effect.