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Dive into the research topics where Gregory A. Evans is active.

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Featured researches published by Gregory A. Evans.


Florida Entomologist | 2005

An identification guide to the whiteflies (Hemiptera : Aleyrodidae) of the southeastern United States

Gregory S. Hodges; Gregory A. Evans

Abstract Whiteflies (Aleyrodidae) are some of the most potentially detrimental pests for agricultural crops and the ornamental plant industry in the southeastern U.S. Generic and species-level identification can be difficult for entomology identifiers that have not received specialized training, but correct identification is essential for (1) the detection of exotic, invasive species and (2) providing proper management recommendations for established pest problems. In order to assist in the identification of commonly occurring specimens in the southeastern U.S. and promote the early detection of exotic species, a generic level key with corresponding distribution records has been developed for thirty four genera and/or whitefly species. Photographs of slide-mounted specimens are provided for each species.


Florida Entomologist | 1993

THE TENUIPALPIDAE OF HONDURAS (TENUIPALPIDAE: ACARI)

Gregory A. Evans; Harvey L. Cromroy; Ronald Ochoa

The following 7 new species of the family Tenuipalpidae are described and illustrated: Brevipalpus andrewsi Evans New Species, Brevipalpus cromroyi, Evans New Species, Brevipalpus hondurani Evans New Species, Brevipalpus ochoai Evans New Species, Tenuipalpus bakerdeleonorum New Species, Tenuipalpus hondurensis New Species New Species, and Tenuipalpus molinai Evans New Species. Forty new host records and 20 new distribution records are reported for Honduran tenuipalpid species. Keys to the 4 genera and 32 Honduran species of tenuipalpids are provided. The following species: Tenuipalpus rhysus Baker & Pritchard, Brevipalpus phoenicoides Gonzalez and Brevipalpus tlaxensis Baker and Tuttle were found to be junior synonyms of Tenuipalpus bakeei McGregor, Brevipalpus phoenicis (Geijskes) and Brevipalpus pini Baker, respectively. Notes on the biology, distribution and host symptomatology of the various species are included.


Florida Entomologist | 2007

A Checklist of the Aphids of Honduras (Hemiptera: Aphididae)

Gregory A. Evans; Susan E. Halbert

Abstract Forty-six species, belonging to 30 different genera of aphids, are reported from Honduras. Of these, 26 represent new distribution records for Honduras. A list of the plant hosts in Honduras on which the aphid species were collected is included.


Florida Entomologist | 1999

A New Species of Cirrospilus (Hymenoptera: Eulophidae) and Two New Synonymies Of Parasitoids Reared From The Citrus Leafminer, Phyllocnistis Citrella (Lepidoptera: Gracillariidae)

Gregory A. Evans

Cirrospilus floridensis, reared from the citrus leafminer, Phyllocnistis citrella Staintain, is described and illustrated. Zagrammosoma zebralineatum De Santis and Pnigalio flavipes (Ashmead) are synonymized with Zagrammosoma multilineatum (Ashmead) and Pnigalio minio (Walker), respectively.


Florida Entomologist | 1998

Parasites of Aleurotrachelus socialis (Homoptera: Aleyrodidae) from Colombia including descriptions of two new species (Hymenoptera: Aphelinidae: Platygasteridae).

Gregory A. Evans; Jose A. Castillo

Five parasite species, including two new species, Encarsia bellottii Evans and Castillo, n. sp. and Amitus macgowni Evans and Castillo, n. sp. were reared from Aleurotrachelus socialis Bondar on cassava, Manihot esculenta, in Colombia. E. bellottii was also reared from Trialeurodes variabilis (Quaintance) on cassava. The new species are described and illustrated.


Florida Entomologist | 1996

A New Species of Encarsia (Hymenoptera: Aphelinidae) from Costa Rica

Gregory A. Evans; Carlos L. Angulo

Encarsia costaricensis Evans and Angulo, reared from the greenhouse whitefly, Trialeurodes vaporariorum from Costa Rica, is described and illustrated. New host and distribution records are reported for Encarsia lycopersici De Santis reared from T. vaporariorum on tomato (Lycopersicon esculentum L.) from Brazil.


Florida Entomologist | 1997

A NEW ENCARSIA (HYMENOPTERA:APHELINIDAE) SPECIES REARED FROM THE BEMISIA TABACI COMPLEX (HOMOPTERA:ALEYRODIDAE)

Gregory A. Evans

Encarsia polaszeki Evans n. sp., reared from the Bemisia tabaci complex from Brazil, is described and illustrated.


Florida Entomologist | 2005

A New Fidiobia Species (Hymenoptera: Platygastridae) Reared from Eggs of Diaprepes doublierii (Coleoptera: Curculionidae) from Dominica

Gregory A. Evans; Jorge E. Peña

Abstract A new species of the genus Fidiobia reared from the eggs of Diaprepes doublierii collected in Dominica is described and illustrated. A key to the New World species of the genus Fidiobia, a host and distribution table of the 13 known Fidiobia species, and a summary of the efforts made to introduce natural enemies of Diaprepes species into Florida are provided.


Florida Entomologist | 1995

Discovery of the Male of Ageniaspis citricola (Hymenoptera: Encyrtidae), Parasitoid of the Citrus Leafminer Phyllocnistis citrella (Lepidoptera: Gracillariidae)

Gregory A. Evans

The male of Ageniaspis citricola Logvinoskaya, reared from the citrus leafminer, Phyllocnistis citrella Stainton, is described and figured.


Florida Entomologist | 1998

The Family Tenuipalpidae in Bermuda (Prostigmata: Acari)

Gregory A. Evans; Harvey L. Cromroy; Ronald Ochoa

Four new host plant records and five new distribution records are reported for tenuipalpid mites collected in a survey of the phytophagous mites of Bermuda. A taxonomic key to the five tenuipalpid species and a host plant list are provided.

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John W. Dooley

Animal and Plant Health Inspection Service

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James Legg

International Institute of Tropical Agriculture

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Curtis A. Nagle

Institute of Food and Agricultural Sciences

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Gillian W. Watson

California Department of Food and Agriculture

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Ronald Ochoa

Agricultural Research Service

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Takumasa Kondo

University of California

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Lilliana Hoyos-Carvajal

National University of Colombia

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