Post-release survey to assess impact and potential host range expansion by Amitus hesperidum and Encarsia perplexa, two parasitoids introduced for the biological control of the citrus blackfly, Aleurocanthus woglumi in Dominica |
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Authors: | Vyjayanthi F Lopez Moses T K Kairo Gene V Pollard Charles Pierre Naomi Commodore and Donny Dominique |
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Institution: | (1) CABI Caribbean &; Latin America (CABI-CLA), Gordon Street, Curepe, Trinidad &; Tobago, West Indies;(2) Present address: CARICOM Regional Organization for Standards and Quality (CROSQ), St. Michael, Barbados, West Indies;(3) Center for Biological Control, College of Engineering Sciences, Technology &; Agriculture, Florida A&;M University, Tallahassee, FL 32307-4100, USA;(4) Food and Agriculture Organization of the United Nations (FAO), Sub-regional Office for the Caribbean, UN House, Hastings, Barbados, West Indies;(5) Ministry of Agriculture and the Environment, Botanical Gardens, Roseau, Dominica, West Indies; |
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Abstract: | Four years after the release of two exotic parasitoids, Amitus hesperidum Silvestri (Hymenoptera: Platygasteridae) and Encarsia perplexa Huang and Polaszek (Hymenoptera: Aphelinidae) for the classical biological control of the citrus blackfly (CBF), Aleurocanthus woglumi Ashby (Hemiptera: Aleyrodidae) in Dominica, a survey was conducted to assess establishment as well as potential nontarget
effects especially on Aleyrodidae and other related taxa. CBF populations were low to non-existent in 50 of 51 field sites
examined. At the site where CBF was encountered, both E. perplexa and A. hesperidum were present and CBF populations were declining. The two parasitoids were not among the several species collected on nontarget
Aleryodidae and Hemiptera. It is concluded that E. perplexa and A. hesperidum have kept CBF populations under effective biological control in Dominica and there is no evidence of any nontarget effects
on other Aleyrodidae or their natural enemies.
Handling Editor: Dirk Babendreier. |
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Keywords: | Citrus Aleurocanthus woglumi Hemiptera Aleyrodidae Biological control Amitus hesperidum Platygasteridae Encarsia perplexa Aphelinidae Hymenoptera Nontarget host range Dominica |
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