卵與幼蟲對小菜蛾族群量之影響

Effects of Eggs and Larvae on the Abundance of Diamondback Moth Population

林大淵(Da-Yuan Lin) ； 王文哲(Wen-Che Wang) ； 王妃蟬(Fei-Chang Wang) ； 白桂芳(Kuei-Fang Pai)

《臺中區農業改良場研究彙報》 109期 (2010/12) Pp. 59-66

https://doi.org/10.6956/BTDAIS.201012.0059

摘要

小菜蛾為十字花科作物上最重要也是最具破壞性的害蟲，不但對現有防治藥劑產生不同程度的抗性，同時也對部份的生物性防治藥劑產生抗性。本試驗的結果顯示，鄰近的休耕田及防治不良田區是重要的蟲源。僅注重殺卵效果的防治策略可能無法有效控制田間小菜蛾數量。試驗結果亦發現移除幼蟲和卵的處理，會吸引更多小菜蛾前來產卵，明顯增加田間的潛在族群量。部分試驗處理後的調查發現小菜蛾的產卵位置也呈現葉面明顯多於葉背，顯示小菜蛾的行為可能已受到處理的影響而改變。顯示重複施行少數或單一防治策略對小菜蛾的防治相當不利，應配合輪作或其他防治策略及耕作方式，才能有效管理田間小菜蛾之發生。

關鍵字

防治策略 ； 潛在族群量 ； 小菜蛾

並列摘要

The diamondback moth is the most important and destructive pest of Brassicaceae. It's not only resistant to many up-to-date pesticides, but also resistant to some biological pesticides. Experiment results suggest that neighboring fallow land and non-control fields would became sources of diamondback moth. Focusing only on egg-killing efficacy of control methods could not control the amount of diamondback moth efficiently. Our results also reveal that more adults would came for egg-laying after larvae and eggs were removed. Results also show that they lay eggs mainly on the upper leaf surface other than back of leaf. This indicated that the behavior of diamondback moth maybe affected by treatment. Indicating repeatedly using single or few control tactics would be unfavorable for controlling diamondback moth. It is recommended that coordinating with rotation or other chemical and cultural control tactics could effectively manage the population growth of diamondback moth in fields.

並列關鍵字

control tactics ； potential abundance ； Plutella xylostella