MITE TRANSMISSION OF PLANT VIRUSES

The subject of mite transmission of plant viruses has been reviewed sev­eral times by Slykhuis (122, 124,126,128). A considerable number of papers on this subject have been published since Slykhuis\u27s last review; several constitute significant additions to the knowledge of the relationships be­tween mites and the plant viruses they transmit. Except, perhaps, for the apparent case of transmission of potato virus Y by Tetranychus telarius (107), the only proven mite vectors of plant viruses are certain members of the family Eriophyidae. In 1927, Amos et al. (2) reported a positive correlation between the infestation of black currants with the black currant gall mite (Cecidophyopsis ribis) and the development of reversion disease. Each of the reports by Massee (69), Smith (135), and Thresh (145), which appeared much later, contributed to the incrimination of C. ribis as the vector of currant reversion virus. Shortly after Massee\u27s report appeared in 1952 several other eriophyid mites were incriminated as vectors of plant viruses. Slykhuis (118-120) reported that Aceria tulipae transmitted both wheat streak mosaic virus and wheat spot mosaic virus. Flock & Wallace (34) reported that Aceria ficus transmitted fig mosaic virus. Wilson et al. (166) reported an undescribed species of Eriophyes [later described by Keifer & Wilson and named E. insidiosus (60)] as a vector of the peach mosaic virus. Then Mulligan (79,80) showed that Aba­ carus hystrix transmitted ryegrass mosaic virus. Since Mulligan\u27s report in 1958, a few additional cases of apparent erio­phyid transmission of plant viruses have been reported; however, several of these need confirmation

MITE TRANSMISSION OF PLANT VIRUSES

The subject of mite transmission of plant viruses has been reviewed sev­eral times by Slykhuis (122, 124,126,128). A considerable number of papers on this subject have been published since Slykhuis\u27s last review; several constitute significant additions to the knowledge of the relationships be­tween mites and the plant viruses they transmit. Except, perhaps, for the apparent case of transmission of potato virus Y by Tetranychus telarius (107), the only proven mite vectors of plant viruses are certain members of the family Eriophyidae. In 1927, Amos et al. (2) reported a positive correlation between the infestation of black currants with the black currant gall mite (Cecidophyopsis ribis) and the development of reversion disease. Each of the reports by Massee (69), Smith (135), and Thresh (145), which appeared much later, contributed to the incrimination of C. ribis as the vector of currant reversion virus. Shortly after Massee\u27s report appeared in 1952 several other eriophyid mites were incriminated as vectors of plant viruses. Slykhuis (118-120) reported that Aceria tulipae transmitted both wheat streak mosaic virus and wheat spot mosaic virus. Flock & Wallace (34) reported that Aceria ficus transmitted fig mosaic virus. Wilson et al. (166) reported an undescribed species of Eriophyes [later described by Keifer & Wilson and named E. insidiosus (60)] as a vector of the peach mosaic virus. Then Mulligan (79,80) showed that Aba­ carus hystrix transmitted ryegrass mosaic virus. Since Mulligan\u27s report in 1958, a few additional cases of apparent erio­phyid transmission of plant viruses have been reported; however, several of these need confirmation

Additional morphological characters and a new host for Aceria gymnoscuta Navia & Flechtmann (Acari, Eriophyidae)

Aceria gymnoscuta Navia & Flechtmann, 2002 foi originalmente descrita com base em espécimes coletados sobre Syagrus cocoides Mart. e Syagrus flexuosa (Mart.) Becc. (Arecaceae). Pequenas variações no padrão do escudo dorsal e na linha esternal em relação à descrição original e detalhes das genitálias do macho e da fêmea são apresentadas neste trabalho, com base em espécimes coletados sobre um novo hospedeiro, Syagrus oleracea (Mart.) Becc.Aceria gymnoscuta Navia & Flechtmann, 2002 was originally described based on specimens collected on Syagrus cocoides Mart. and Syagrus flexuosa (Mart.) Becc. (Arecaceae). Slight variations in the dorsal shield pattern and the sternal line, in relation to the original description, and details on male and female genitalia are mentioned in this paper, based on specimens collected on a new host, Syagrus oleracea (Mart.) Becc.Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP