Effect of Essential oils from Zingiberaceae on Mortarity of Spiralling Whitefly, Aleurodicus dispersus (Russell), (Hemiptera: Aleyrodidae)

Abstract

The aimed of this study was to investigate efficacy of essential oil from 3 Zingiberaceae plants including ginger (Zingiber officinale), Thai ginger (Alpinia galanga) and turmeric (Curcuma longa) on mortality of spiralling whitefly. The 4 levels of 3 essential oil of Zingiberaceae plants were 1, 5, 10 and 20% (v/v). The contact method was used under laboratory condition. The mortalities of spiralling whitefly were recoded at 5, 10, 15, 20 and 30 min. by stereo microspore. The result shown that the essential oil of Curcuma longa at 20% (v/v) was the most effective to control spralling whitefly with 100% after 30 min. application and LT50 value of less than 1 min.