Seasonal abundance of spider mites and their predators on red raspberry was studied in 1993 and 1994 at 2 agricultural locations near Quebec City, Canada. Three raspberry systems, wild raspberry, pesticide-free cultivated raspberry, and commercial raspberry treated with a variety of pesticides, were sampled at frequent intervals. Tetranychus mcdanieli McGregor accounted for 87.5, 80.6, and 95.0...

The Brazilian Pampa presents a high diversity of fauna and flora within mosaic environments. aim this study was to evaluate the assemblages predatory mites (Phytoseiidae Stigmaeidae) in three different environments: Grassland shrub vegetation, Grazing Exclusions fenced for six years Riparian Forest with tree vegetation. Phytoseiidae Stigmaeidae were evaluated total 324 plant sampled from nine s...

The contact toxicity activity of an essential oil extracted from Acorus calamus (L.) (Acoraceae) was evaluated against the phytophagous spider mites Tetranychus urticae Koch and macfarlanei Baker & Pritchard (Acari: Tetranychidae) predatory mite Amblyseius longispinosus (Evans) Phytoseiidae). Adult mortality 24 h following application 5% (v/v) concentration exceeded 90% for T. macfarlanei. Appl...