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Revista Brasileira de Zoologia

Print version ISSN 0101-8175

Rev. Bras. Zool. vol.19 no.4 Curitiba Dec. 2002

http://dx.doi.org/10.1590/S0101-81752002000400016 

Variações morfológicas intra e interpopulacionais de Euseius citrifolius Denmark & Muma e Euseius concordis (Chant) (Acari, Phytoseiidae)

 

Intra and interpopulational morphological variations of Euseius citrifolius Denmark & Muma and Euseius concordis (Chant) (Acari, Phytoseiidae)

 

 

Aloyséia Cristina da Silva NoronhaI; Gilberto José de MoraesII

IEmbrapa Mandioca e Fruticultura. Caixa Postal 007, 43800-000 Cruz das Almas, Bahia, Brasil. E-mail: aloyseia@cnpmf.embrapa.br
IIDepartamento de Entomologia, Fitopatologia e Zoologia Agrícola, Escola Superior de Agricultura "Luiz de Queiroz", Universidade de São Paulo. Caixa Postal 9, 13418-900 Piracicaba, São Paulo, Brasil. Pesquisador CNPq, E-mail: gjmoraes@carpa.ciagri.usp.br

 

 


ABSTRACT

The determination of morphologic variability within and between populations of phytoseiid mites is important for the precise species identification. Euseius citrifolius Denmark & Muma, 1970 and Euseius concordis (Chant, 1959) are phytoseiids commonly found on different crops in Brazil and other South American countries. The morphologic characterization of populations preliminarily identified as E. citrifolius and E. concordis was done through examination of 10 adult females and 10 adult males of each population and of 2 to 10 adult females and males resulting from crosses between those populations. The plant substrate and collection site of each population were: E. citrijolius: Bauhinia sp. in Arroio do Meio, Rio Grande do Sul, Coffea arabica Linnaeus in Campinas, São Paulo and Terminalia catappa Linnaeus in Petrolina, Pernambuco. E. concordis: Passiflora edulis Sims. i.flavicarpa Deg. in Arroio do Meio, Manihot esculenta (Crantz) in Jaguariúna, São Paulo, Hevea brasiliensis Muell. Arg. in Pontes e Lacerda, Mato Grosso, T. catappa in Petrolina and C arabica in Viçosa, Minas Gerais. A comparison of the measurements of different structures of individuals of each population and of type specimens of E. citrifolius and E. concordis confirmed the preliminary identification of the populations. Significant relationships were observed between mean setal lengths and the respective ranges within each population. Females and males of E. citrifolius from Petrolina and E. concordis from Jaguariúna had some of the setae generally shorter than those of other populations of the same species. Measurements of males resulting from heterogamic crosses indicated that E. citrifolius and E. concordis reproduce by pseudo-arrhenotoky.

Key words: Mite, phytoseiid, predator, pseudo-arrenotoky, taxonomy


 

 

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Recebido em 11.I.2002; aceito em 11.X.2002.

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