Florida Entomologist (2016) 99, 673-677

Tufail Ahmed Wagan, Yueping He, Wanlun Cai, Jing Zhao and Hongxia Hua (2016)
Fumigant and contact toxicity and oviposition deterrent effects of plant essential oils on Bemisia tabaci (Hemiptera: Aleyrodidae)
Florida Entomologist 99 (4), 673-677
Abstract: Ethanol-extracted essential oils from sweet flag Acorus tatarinowii Schott (Acoraceae), cow parsnip Heracleum hemsleyanum Diels (Apiaceae), and wild asparagus Stemona japonica (Blume) Miq. (Stemonaceae) were examined for their contact and fumigant toxicity and oviposition deterrent potential against Bemisia tabaci (Gennadius) (Hemiptera: Aleyrodidae) under laboratory and greenhouse conditions during Oct to Dec 2015. To determine fumigant toxicity, adult whiteflies were tested in airtight glass jars containing essential oil on filter paper. Mortality rates were recorded after 2, 4, 6, and 8 h of exposure. Essential oil from A. tatarinowii was the strongest toxicant, with mortality rates of 20.4, 37.1, 73.3, and 98.8%, respectively, followed by S. japonica and H. hemsleyanum. To test contact toxicity, females were released in a cage containing tomato leaves treated with essential oil in the laboratory, and females were released in a cage containing tomato plants sprayed with essential oil in the greenhouse. Mortality rates were examined after 6, 12, 18, and 24 h in the laboratory and after 24 and 48 h in the greenhouse. Leaves were examined for oviposition immediately after the last recording. Essential oils from A. tatarinowii showed the most insecticidal and anti-oviposition activity for all recording times in both the laboratory (41.3, 56.9, 85.6, and 95.6% mortality, respectively) and the greenhouse (58.3 and 80.8% mortality, respectively), followed by H. hemsleyanum and S. japonica. Based on our study, all 3 essential oils possess contact and fumigant toxicity and anti-oviposition properties against female whiteflies.
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Research topic(s) for pests/diseases/weeds:
control - general

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Pest and/or beneficial records:

Beneficial	Pest/Disease/Weed	Crop/Product	Country	Quarant.
	Bemisia tabaci