【摘要】 长期以来,国内有关文献一直将番茄列为烟青虫Helicoverpaassulta的寄主植物,但田间调查结果往往与此矛盾,本研究的目的是阐明番茄是否为烟青虫的寄主植物。室内试验表明,虽然烟青虫成虫在盆栽番茄植株上产卵较多,但无论是用番茄离体嫩叶还是用盆栽植株饲养,初孵幼虫绝大部分在1龄死亡,平均存活时间很短,不会对番茄造成有经济意义的危害;即使用番茄青果饲养的3龄幼虫也不能活到6龄。根据人工饲料饲养结果估测,番茄苷对初孵幼虫的致死中浓度LC50为0·0744%,叶和青果中报道的番茄苷含量已接近或超过此水平,这是幼虫不能存活的主要原因之一。田间调查也表明,烟青虫并不危害番茄。因此,番茄不是烟青虫的寄主植物。文献中的记载很可能是将棉铃虫误判为烟青虫。更多还原

【Abstract】 Tomato has been listed as a host plant of the oriental tobacco budworm (OTB), Helicoverpa assulta for long time in literatures in our country, with which many reports from the field surveys disagreed. The present investigation aims to clarify if tomato plant is OTB host. Laboratory trials showed that OTB moth laid eggs on tomato plant, but neither detached tomato leaves nor potted plant supported neonate growth, and all the 3rd instar larvae feeding on the green fruits died before the 6th instar too. Death of the larvae could be attributed to presence of tomatine in these organs, and its contents reported in the literatures are in close to or exceed the LC_ 50 of 744 ppm for the neonates as estimated using the artificial diet with different contents of the chemical. The field survey also excluded possibility of OTB infesting tomato plants. These results suggest that tomato plant is not OTB host and the records in the literatures might confuse H. armigera and H. assulta because of their similarity in morphology and feeding habits.更多还原