ABSTRACT
The two-spotted spider mite, Tetranychus urticae Koch, has caused significant damage to vineyards in the valley of the São Francisco River in Brazil. Neoseiulus idaeus Denmark & Muma is one of the most abundant species of predatory mites on vines in this region. This study evaluated the population growth rates of T. urticae on leaves of two grape (Vitis vinifera L.) cultivars ('Italia' and 'Superior Seedless') and jack bean [Canavalia ensiformis (L.) DC.] and, also, to estimate the predation rates of the pest mite by N. idaeus on leaves of both grape cultivars and jack bean. A higher oviposition rate of T. urticae was observed on 'Superior Seedless' than on 'Italia' grape leaves; however, there was no significant difference in the instantaneous growth rates of T. urticae for these grape cultivars. For 'Superior Seedless', the spider mite egg viability was significantly lower than on 'Italia' grape, indicating a resistance factor in this grape cultivar. The phytoseiid N. idaeus preyed higher number of T. urticae females on 'Superior Seedless' leaves than on 'Italia' grape and jack bean leaves for the densities of 10 and 20 pest mites per leaf arena (9 cm2). Evaluations of leaf trichomes in both grape cultivars indicated the occurrence of longer trichomes on the basal portion of the main veins of 'Superior Seedless' leaves. The presence of these longer trichomes may be associated with the better performance of N. idaeus on 'Superior Seedless' leaves.
Subject(s)
Tick Control , Vitis , Oviposition , Predatory Behavior , Pest Control, Biological , Mite InfestationsABSTRACT
Este trabalho teve como objetivo fazer um levantamento das espécies de ácaros pertencentes à subordem Prostigmata em Coffea spp. em diferentes localidades do Estado de São Paulo. Folhas e ramos de cafeeiros (Coffea spp.) foram coletados em 24 municípios do Estado de São Paulo e em diferentes épocas do ano. Todos os ácaros encontrados foram montados em lâminas de microscopia. A identificação dos ácaros foi feita até o nível específico quando possível. Foram identificadas 79 espécies de ácaros pertencentes às famílias Anystidae, Bdellidae, Cheyletidae, Cunaxidae, Diptilomiopidae, Eriophyidae, Eupalopsellidae, Eupodidae, Iolinidae, Meyerellidae, Nanorchestidae, Paratydeidae, Raphignathidae, Stigmaeidae, Tarsonemidae, Tenuipalpidae, Tetranychidae, Trombidiidae, Tuckerellidae e Tydeidae.
The objective of this study was to carry out a survey of mite species belonging to the suborder Prostigmata on Coffea spp. in different localities of the State of São Paulo. Samples of coffee (Coffea spp.) leaves and branches were collected in 24 municipalities of the State of São Paulo, in different periods of the year. All mites collected were mounted on microscope slides. Whenever possible, mites were identified to species level. Seventy-nine species were identified, belonging to the families Anystidae, Bdellidae, Cheyletidae, Cunaxidae, Diptilomiopidae, Eriophyidae, Eupalopsellidae, Eupodidae, Iolinidae, Meyerellidae, Nanorchestidae, Paratydeidae, Raphignathidae, Stigmaeidae, Tarsonemidae, Tenuipalpidae, Tetranychidae, Trombidiidae, Tuckerellidae e Tydeidae.
ABSTRACT
Este trabalho teve como objetivo fazer um levantamento das espécies de ácaros pertencentes à ordem Mesostigmata em Coffea spp. em diferentes localidades do estado de São Paulo. Folhas e ramos de cafeeiros (Coffea spp.) foram coletados em 27 municípios do estado de São Paulo e em diferentes épocas do ano. Todos os ácaros encontrados foram montados em lâminas de microscopia, em meio de Hoyer. A identificação dos ácaros foi feita até o nível específico quando possível. Foram identificadas 39 espécies de ácaros pertencentes às famílias Ameroseiidae, Ascidae, Laelapidae, Macrochelidae, Parasitidae, Phytoseiidae e a um grupo que ainda está sem uma família definida, Africoseius sp.
The objective of this study was to carry out a survey of mite species belonging to the order Mesostigmata on Coffea spp. in different localities of the State of São Paulo. Samples of coffee (Coffea spp.) leaves and branches were collected in 27 municipalities of the State of São Paulo, in different periods of the year. All collected mites were mounted in Hoyer's medium on microscope slides. The identification of mites was at species level when possible. Thirty-nine mite species were identified, belonging to the families Ameroseiidae, Ascidae, Laelapidae, Macrochelidae, Parasitidae, Phytoseiidae and to a group for which the family is still not defined, Africoseius sp.