The expansion of red palm mite (RPM), Raoiella indica (Acari: Tenuipalpidae) in Brazil could impact negatively the native plant species, especially of the family Arecaceae. To determine which species could be at risk, we investigated the development and reproductive potential of R. indica on 19 plant species including 13 native species to the Brazilian Amazon (12 Arecaceae and one Heliconiaceae), and six exotic species, four Arecaceae, a Musaceae and a Zingiberaceae. Values of the instantaneous rate of increase (ri) were initially estimated at 7, 14, 21 and 28 days after infestation of each species. Higher values of ri (> 0.05) were determined on the Arecaceae Adonidia merrillii, Astrocaryum jauari, Cocos nucifera, Bactris simplicifrons, Mauritia flexuosa, Phoenix dactylifera and Socratea exorrhiza, and on the Heliconiaceae Heliconia psittacorum Sassy; these were classified as “potential primary hosts”. Lower, but still positive values of ri (0-0.05) were determined on the Arecaceae Bactris maraja, Oenocarpus bacaba, Oenocarpus bataua and on the Musaceae Musa × paradisiaca (Prata variety); these were classified as “potential secondary hosts”. Negative values of ri were determined for the remaining plants, i.e., the Arecaceae Astrocaryum aculeatum, Attalea maripa, Bactris gasipaes, Elaeis guineensis, Euterpe oleracea, Euterpe precatoria, and the Zingiberaceae Alpinia rosea; these were considered “non-hosts”. Species with ri < 0.05 were considered not to be threatened by the RPM. Biological parameters of RPM were evaluated on the plant species with positive ri (except B. maraja) and two native species with negative ri (E. oleracea and E. precatoria). Mean developmental time ranged from 14.7 days on C. nucifera to 21.4 days on Musa × paradisiaca, showing a significant influence of the plant substrate. Immature viability, oviposition rate, net reproductive rate (R0) and intrinsic rate of increase (rm) were affected by the plant species.

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The first record of a Hystrichonychini (Trombidiformes: Tetranychidae) mite from Brazil with the description of a new species of the genus Paraplonobia Wainstein is reported.

The banana rust mite, Phyllocoptruta musae Keifer, 1955 (Eriophyidae), was observed for the first time in the Caribbean in 2020, in Dominican Republic, in the Línea Noroeste region, Valverde and Monte Cristi provinces, infesting Musa acuminata plantations (Gran Enano and Williams hybrids) (Gómez-Moya et al., 2021). This eriophyid mite was described from Queensland, Australia on Musa x paradisiaca L. (Keifer, 1955). In the Eastern Hemisphere, besides Australia P. musae had been reported from China, in the autonomous region of Guangxi Zhuang; on Hainan Island, and in Thailand (Li et al., 2007; Tan et al., 2014; Chandrapatya et al., 2016; Amrine & de Lillo, personnal communication). In Australia infestations were reported causing fruit spotting (Keifer, 1955).