9个水稻栽培种和1个水稻组培种对稻螟赤眼蜂和赤眼卵蜂的互利作用（英文）

采用培养皿法对营养生长期和开花期的9个水稻栽培种（Pusa Sugandh-2, Pusa Basmati-1, Pusa-2511, Pusa Basmati-370, Pusa-1077, Karnal Local, PRR-78, Jaya, Pusa-1238）和1个组培种（Culture No.34）的正己烷提取物进行了生测，以调查它们对稻螟赤眼蜂Trichogramma japonicum Ashmead和赤眼卵蜂Trichogramma chilonis (Ishii)平均寄生活性指数（PAI）和平均寄生百分率的影响。将不同水稻品种的正己烷提取物进行气相 液相色谱，来测定饱和碳氢化合物。其中，营养生长期的Pusa Sugandh-2叶片提取物激发两种寄生蜂产生最大的反应，平均寄生率最大。而开花期的Pusa Basmati-1使两种寄生蜂的平均寄生率最高。对营养生长阶段的叶片提取物进行的气相 液相色谱分析表明：Pusa Sugandh-2 含有25个碳原子(C25) 和29个碳原子 (C29)的2种化合物。对开花期的叶片提取物进行的气相 液相色谱分析也表明：Basmati-1 含有25个碳原子(C25)、26个碳原子(C26)和29个碳原子 (C29)的3种化合物，可激发寄生蜂产生最大的反应

Synomonal effect of nine varieties and one culture of rice on Trichogramma japonicum Ashmead and Trichogramma chilonis (Ishii) (Hymenoptera: Trichogrammatidae)

Bioassays of the hexane extracts of nine varieties viz., Pusa Sugandh-2, Pusa Basmati-1, Pusa-2511, Pusa Basmati-370, Pusa-1077, Karnal Local, PRR-78, Jaya, Pusa-1238 and one culture of rice, Culture No.34 in vegetative and flowering phase were carried out in Petri dish, to observe their synomonal effect on mean parasitoid activity index (PAI) and mean percent parasitism by Trichogramma japonicum, Ashmead and Trichogramma chilonis (Ishii). The hexane extracts of different rice varieties were subjected to gas liquid chromatography to determine the saturated hydrocarbons. Among these, leaf extracts from variety Pusa Sugandh-2 elicited maximum response in vegetative phase for both the parasitoids by way of mean percent parasitism. Whereas in flowering phase variety Pusa Basmati-1 elicited maximum mean percent parasitism. Gas liquid chromatography of the leaf extracts from vegetative phase revealed that Pusa Sugandh-2 had two favorable hydrocarbons pentacosane (C25) and nonacosane (C29). Gas liquid chromatography of leaf extract from flowering stage also revealed that Pusa Basmati-1 had three favorable hydrocarbons viz., pentacosane (C25), hexacosane (C26) and nonacosane (C29) which could be ascribed to the highest response elicited by these varieties.