Ovipositional responses of the tomato fruitworm (Helicoverpa armigera) (Lepidoptera: Noctuidae) to the presence of eggs and to different stages of the tomato plant

番茄夜蛾（Helicoverpa armigera）（Lepidoptera: Noctuidae）對不同生長期及已被產卵之番茄植株之產卵反應

Aliou Diongue ； Narayan Sarjerao Talekar ； 張灜福(Yin-Fu Chang) ； 賴博永(Po-Yung Lai)

《植物保護學會會刊》 46卷4期 (2004/12) Pp. 303-314

https://doi.org/10.6715/PPB.200412_46(4).0001

摘要

Various aspects of oviposition of the tomato fruitworm (TFW), Helicoverpa armigera (Hübner), on tomato plants were studied in the laboratory and a greenhouse. The objectives of the study were to determine the preference of the TFW for various phenological stages of the host plant for egg laying, and the influence of the presence of prior oviposited eggs on fresh egg laying, as well as to confirm whether the TFW marks its eggs or oviposition substratum while ovipositing on tomato plants. TFW females preferred to lay eggs on tomato plants in the flowering stage rather than the vegetative stage. Removal of flowers from flowering plants or placing fresh tomato flowers on plants in the vegetative growth stage did not change oviposition behavior. The physiological status of plants in the flowering stage, rather than the mere physical presence of flowers, appeared to attract TFW adults for oviposition. TFW females avoided egg laying or laid fewer eggs on plants which had previously been used for oviposition compared to plants with no previously eggs laid. Neither the presence of manually placed live or dead eggs, nor the removal of naturally laid eggs from tomato plants changed the oviposition behavior of the TFW. The presence of damage to fruit inflicted by the TFW reduced the subsequent number of eggs laid on such plants compared to plants with no damage to the fruit. Ovipositing females did not seem to mark their eggs or host plants with their body scales while laying eggs, as the presence of TFW adult body scales on tomato plants did not affect oviposition behavior.

關鍵字

Helicoverpa armigera ； oviposition behavior ； damaged fruits ； oviposition markers ； tomato

並列摘要

本研究探討在實驗室及溫室內番茄夜蛾在番茄植株上之產卵反應，目的在瞭解番茄夜蛾對不同生長期之番茄植株之產卵喜好性，及植株上是否已被產卵對新產卵之影響，並確定番茄夜蛾在產卵時是否標記其卵。比較不同番茄生長期之產卵喜好，發現番茄夜蛾較喜產卵於開花期之番茄植株上。將開花期之花摘除，或將花置於生長期之番茄植株上，不改變番茄夜蛾產卵行為；顯然開花期番茄植株之生理狀況比單純花的存在更吸引番茄夜蛾成蟲前往產卵。相較於未曾被產卵之番茄植株，番茄夜蛾避免或產較少的卵在先前已經被產卵之植株上。不論人工放置活或死的卵於植株上，或移除自然產在番茄植株上的卵，均不改變番茄夜蛾之產卵行為。相較於沒有任何為害果之植株，植株上有番茄夜蛾為害之果實時，產卵數降低。雌蟲產卵時，似乎未對其產之卵或植株作標記，因植株上有雌蟲鱗片時，其產卵並不受影響。

並列關鍵字

番茄夜蛾 ； 產卵行為 ； 害果 ； 產卵標記 ； 番茄