<p class="Body"><strong>Bioecological aspects of mites associated with </strong><strong><em>Vitis vinifera </em></strong><strong>varieties in the state of Rio Grande Do Sul, Brazil</strong></p>

Abstract

Viticulture is an activity of economic importance in the state of Rio Grande do Sul, especially in Serra Gaúcha, which is the major grape-producing region. However, an increase in cultivated areas has been observed in other municipalities in the state. The aim of this study is to characterize mite diversity and community behavior on different varieties, recognizing which predatory species have potential to control phytophagous mites associated with Europan varieties in the Taquari Valley, Rio Grande do Sul state. The study was conducted in vineyards located in the municipalities of Marques de Souza: ‘BRS Vitória’ and cv ‘Itália’ “m”; Imigrante: cv ‘Itália’ “i”; Dois Lajeados: cv ‘Itália’ (c and f), ‘Tannat’ and ‘Chardonnay’; and Putinga: ‘Champanhe’ and ‘Moscato’. Samplings were carried out monthly in the period ranging from March 2017 to March 2018, during which twenty plants were randomly collected from each variety. Three leaves were clipped from each plant; one from the apical third, one from the median third, and one from the basal third, totaling 60 leaves per area. A total of 10,533 specimens were collected, belonging to 12 families, 38 genera, and 53 species, along with those belonging to the suborder Oribatida. The ‘Itália’ “c” variety had the highest abundance (2,012), followed by ‘Moscato’ (1,788) and ‘BRS Vitória’ (1,593). Phytoseiidae had the highest diversity among the mite families observed, with 20 species followed by Tetranychidae (8). The most abundant species were Polyphagotarsonemus latus (Banks) (3,420) and Euseius concordis (Chant) (565), present throughout the study period. ‘Chardonnay’ variety had the highest similarity (72.55%) among mite fauna compositions and the highest dissimilarity occurred between ‘BRS Vitória’ and ‘Champanhe’ varieties (95.48%). Environments evaluated in Dois Lajeados and Putinga were the most homogeneous concerning mite fauna diversity and abundance.

Evaluation of the lipidic composition and antioxidant activity of the seed oil from grapes ‘Isabel’ and ‘Rose Niagara’

“…According to Mello and Machado (2020) and Silva et al (2020), Brazilian grape production is concentrated in the South, Southeast, and Northeast regions, where viticulture has socioeconomic importance. The states of Rio Grande do Sul and Santa Catarina (both parts of South Brazil) account for more than 90% of the national production of wines and juices.…”

Intraspecific variations and additional information about Cheletomimus (Hemicheyletia) wellsi (Baker, 1949) (Trombidiformes: Cheyletidae) from Brazil

“…Recently, C. (H.) wellsi has been found on Vitis vinifera L. (Vitaceae) (Johann et al 2009;Da Silva et al 2020), on Malus domestica Borkh (Rosaceae) (personal communication), in ruber trees (Hernandes & Feres 2006), in bird nests (Silva et al 2018), in poultry systems (Horn et al 2018), and in natural environments of the Southern Pampa Biome (Toldi et al 2021). In this paper, we complement the description of C. (H.) wellsi, analyzing specimens collected in southern Brazil, presenting measurements of the structures that were not previously measured and described.…”

Influência das cultivares de videiras (Vitis vinifera L.) e do sistema de condução sobre a acarofauna

“…O tarsonemídeo Polyphagotarsonemus latus (Baker, 1904), conhecido como ácaro branco, é o ácaro fitófago mais abundante e dominante no cultivo de videiras no Rio Grande do Sul, tendo seu desenvolvimento favorecido quando existe baixa luminosidade, temperatura e umidade alta. É encontrado com maior frequência nas folhas novas e brotações (Da Silva et al 2020), do qual alimenta-se, ocasionado a paralisação do crescimento dos ramos (Haji et al 2001).…”

“…Klock et al (2011) reportaram P. latus associado a cultivar Merlot. Em levantamento realizado nos municípios de Dois Lajeados, Imigrante, Marques de Souza e Putinga, P. latus foi observado com maior frequência e abundância nas folhas apicais, associado a todas as cultivares viníferas avaliadas, sem contudo, ocasionar prejuízo à cultura (Da Silva et al 2020).…”

“…Esse fitoseídeo é generalista, alimentando-se de ácaros e de pólen, e apresenta potencial como possível inimigo natural de ácaros fitófagos (McMurtry et al 2013). Em estudo realizado nos municípios de Dois Lajeados, Imigrante, Marques de Souza e Putinga, E. mesembrinus foi observado com maior frequência nas folhas apicais da cultivar vinífera Rainha Itália (Da Silva et al 2020).…”