A revision of the spider mite family Tetranychidae

Abstract

The history of development of our knowledge of animal groups follows a uniform pattern. First there is the problem of identification, usually beginning with description of new forms. This is followed by first attempts at a classification. Then regional systematic treatments appear. Finally a monograph becomes possible, based on the accumulated work of many people.Curiously, the mites have not followed this precise pattern. Because of their economic importance, mites have long attracted attention. Much has been written on these small but numerous and widely distributed arthropods. \et for years scientists did little to further knowledge of the systematics of mites. Only recently have new species been described in precise terms and old species redescribed adequately. Now the time is propitious for monographic treatment, and it is indeed fortunate that two such outstanding specialists as Professor A. Earl Pritchard and Dr. E. W. Baker have dedicated themselves to the job and have chosen the group that is most destructive to agricultural crops, the spider mites.In the following pages the authors have not only considered all previous work in the group, but they have gone to original sources of type speci¬ mens and living material in the museums of North America and Europe and the type localities of two continents. The revision of the Tetranychidae presented in this book not only provides the essential information re¬ quired by economic entomologists, but also provides illustrations of a caliber seldom equalled in taxonomic work and a sound classification for the use of taxonomists.

Ácaros (Arachnida, Acari) de plantas ornamentais na região noroeste do estado de São Paulo, Brasil: inventário e descrição dos sintomas causados pelos fitófagos

“…Essa espécie apresenta variações morfológicas entre diferentes populações e hospedeiros, além de variações dentro da mesma população, em relação ao comprimento e a forma das setas dorsais (Muma et al 1953;Pritchard & Baker 1955;Flechtmann & Baker 1975). Esse fato levou pesquisadores a considerarem E. banksi uma "espécie politípica" (na realidade, polimórfica).…”

Levantamento e observações naturalísticas da acarofauna (Acari, Arachnida) de seringueiras cultivadas (Hevea spp., Euphorbiaceae) no Brasil

“…Espécie de ampla distribuição geográfica, ocorrendo em grande número de plantas hospedeiras. Argentina, E.U.A., México (PRITCHARD & BAKER 1955), Brasil (Bahia, Minas Gerais, Pernambuco, São Paulo) (FLECHTMANN & BAKER 1970;PASCHOAL 1971);Paraguai (ARANDA & FLECHTMANN 1971).…”

“…lF, 9-VI-1988; 4F e 3M, 18-VIlI-1989, Bálsamo, São Paulo; 5F e 3M, 13- VI-1990, Ibitinga, São Paulo;1F, 07-VI-1991 Oligonychus gossypii (Zacher, 1920) Paralelranychus gossypii Zacher, 1921: 183. Oligonychus gossypii; Pritchard & Baker, 1955: 359. -Baker & Pritchard, 1960: 508.…”

“…Tetranychus mexicanus (McGregor, 1950) Septanychus mexicanus McGregor, 1950: 323 . Tetranychus mexicanus; Pritchard & Baker, 1955: 411-412. -Flechtmann & Baker, 1970: 162.…”

Citrus rootstocks influence the population densities of pest mites

“…Citrus rust mite is a key pest in the main citrus producing regions of Brazil and its attack may lead to yield losses as well as aesthetic changes in fruit appearance and reduction in total soluble solids (CHIARADIA, 2001;MORAES & FLECHTMANN, 2008;MENDONÇA & SILVA, 2009). The mite T. mexicanus is a leaf pest of several crops including citrus (PRITCHARD & BAKER, 1955;QUIROS-GONZALEZ, 2000;RAZMJOU et al, 2009;VACANTE, 2010).…”