Abstract: The rice plants of susceptible variety TN1 and resistant varieties Rathu Heenati (RHT). IR64 and Nabeshi to the whitebacked planthopper, Sogatella furcifera, were extracted using a device of steam distillation-simultaneous extraction with diethyl ether. The oily extracts were obtained through further extraction and condensation of steam distillates and analyzed by gas chromatography-mass spectrometry (GC-MS). The analytical results indicate that the core position of 36 secondary volatiles among 64 detected compounds was 9 alcohols, 9 aldehydes, 7 ketones, 4 esters, 3 hydrocarbons. 2 acids, 1 olefin and heterogeneous ring compound. The volatile chemicals with larger quantities were 2-hexenal, irisone, trans-hexenol, phytol, 3.5.5-trimethyl-3-cyclohexadien-1-ol and methyl salicylate. The two-choice tests or S. furcifera on TN1 plants treated with steam distillates extracts (SDE) indicate that the preference of S. furcifera to SDE of both resistant and susceptible varieties did not differ significantly. The tests of S. furcifera orientation by an olfactometer reveals that phenacyl alcohol and hexenal attracted significantly more in insects than check acetone. S. furcifera excreted significantly more honeydew on the untreated TN1 and TN1 plants treated with acetone and SDE of TN1 than on TN1 plants treated with SDEs of Nabeshi and IR64. S. furcifera ingested less from the nutritional solution incorporated with SDEs and the selected volatiles than from nutritional solution alone. The SDE of resistant RHT possessed the strongest antifeeding effect to S. furcifera following by β-irisone and hexenal.

Key words: feeding response, insect resistance: orientation, secondary volatiles, Sogatella furcifera

摘要： 采用水蒸汽蒸馏－乙醚同时萃取装置对抗白背飞虱品种Rathu Heenati(RHT)，IR64，Nabeshi和感虫对照品种TN1稻株进行挥发性次生物质提取，浓缩所得精油，经“气谱－质谱”（GC-MS）联机机检测出64个有机的化学组分，其中366主要分子结构为：9种醇，9种醛，7种酮，4种酯，3种烷烃，2种酸，烯和杂环人经合物各1种。2-已烯醛，β-紫罗兰酮，叶醇（反式），叶绿醇，3,5,5-三甲-3-环已烯-1-酮和水杨酸甲酯的含量较高。将蒸馏提取物回喷在TN1稻株上，白背飞虱对抗虫和感虫稻株蒸馏提取物的趋性没有显著差异。嗅觉仪测定飞虱的趋性结果表明，单体化合物苯甲醇和己烯醛比对照丙酮更易吸引白背飞虱。在回喷TN1蒸馏提取物、丙酮溶液和未处理的TN1稻株上，白背飞虱分泌的蜜露量明显较Nabeshi和IR64蒸馏提取物处理过的TN1稻株上分泌的高。白背飞虱从掺有蒸馏提取物和挥发物单体的营养液中吸食的量均比从单纯营养液中的少；抗虫品种RHT蒸馏提取物对白背飞虱拒食作用最强，β－紫罗兰酮和己烯醛次之。

关键词: 白背飞虱, 抗虫性, 水稻, 品种, 挥发性次生物质