Spider mites associated to soybean in Rio Grande do Sul, Brazil

Abstract

-The objective of this work was to study the occurrence and geographic distribution of phytophagous mites associated to soybean in Rio Grande do Sul, Brazil. Samplings were performed from January to May 2005 on genetically modified soybean (glyphosate-tolerant) crops, in 27 municipalities of six regions -Alto Vale do Uruguai, Campanha, Depressão Central, Planalto Médio, Missões and Serra do Sudeste. Five phytophagous mite species belonging to the family Tetranychidae -Mononychellus planki, Tetranychus desertorum, T. gigas, T. ludeni and T. urticae -occurred in 21, 12, 5, 3 and 14 municipalities, respectively. A map of Rio Grande do Sul with the geographic distribution of each species is presented, as well as an illustrated dichotomous key to help the identification of the spider mites found.

Weed Management in Soybean — Issues and Practices

“…However, in recent years, it has been recorded severe and frequent attacks of these in different producing regions in Brazil [48]. Into surveys about GR soybean carried out in the state of Rio Grande do Sul, six phytophagous mite species were identified, five tetranychid -Mononychellus planki (McGregor), Tetranychus desertorum (Banks), T. gigas (Pritchard & Baker), T. ludeni (Zacher) and T. urticae (Koch) -and white mite tarsonemid Polyphagotarsonemus latus (Banks) [49,50]. In most of the sampled sites, more than one tetranychid were reported, being directly influenced by weed management.…”

Comparative life table analysis ofTetranychus urticae(Acari: Tetranychidae) on 14 soybean genotypes

“…Most polyphagous mites associated with soybean throughout the world belong to the family Tetranychidae, with 24 species reported (Roggia et al ., 2008). Among these, two‐spotted spider mite (TSSM), Tetranychus urticae Koch, has been considered as a major pest of soybean in most countries around the world and causing serious damage in many soybean‐growing areas of Iran (Khanjani, 2005).…”

Biological performance of the predatory mite Neoseiulus idaeus (Phytoseiidae): a candidate for the control of tetranychid mites in Brazilian soybean crops

“…Despite several animals might affect soybean crops, a special group responsible to such damage are phytophagous tetranychids mites. This affirmation is reinforced by recent studies that have been reporting high populations of tetranychids mites species (Mononychellus planki McGregor, Tetranychus desertorum Banks, T. gigas Pritchard & Baker, T. ludeni Zacher and T. urticae Koch) in soybean crops (Guedes et al, 2007;Reichert et al, 2014;Rezende et al, 2014;Roggia et al, 2008).…”