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Mites and other Acarina

Vicente-Santiago, Marco Mancebón

Agriculture and Food Department. Faculty of Sciences, Agrifood Studies and IT University of La Rioja

In recent years (in continuation of a trend that has become consolidated since the mid 20th century), there has been an increase observed in the occurrence of mite infestations of grapevines. The main reason behind this trend has been the indiscriminate use of broad-spectrum synthetic pesticides; the implementation of RD1311/2012 on the Sustainable Use of Plant Protection Products will contribute to reducing this practice.
Two mite species that have taken on significance as grapevine pests are the hornbeam mite, Eotetranychus carpini (Acari: Tetranychidae) and the grapevine rust mite, Calepitrimerus vitis (Acari: Eriophyidae).
Current management strategies and future trends are identified for each.

In recent years (in continuation of a trend that has become consolidated since the mid 20th century), there has been an increase observed in the occurrence of mite infestations of grapevines. The main reason behind this trend has been the indiscriminate use of broad-spectrum synthetic pesticides; the implementation of RD1311/2012 on the Sustainable Use of Plant Protection Products will contribute to reducing this practice.
Two mite species that have taken on significance as grapevine pests are the hornbeam mite, Eotetranychus carpini (Acari: Tetranychidae) and the grapevine rust mite, Calepitrimerus vitis (Acari: Eriophyidae).
Current management strategies and future trends are identified for each. While chemical means continue to be the most widely used method for controlling both pests, other IPM-compatible management methods are increasingly being used. In both cases, it is worth highlighting the use of cultural control practices, conservational biological control to foster the presence of phytoseiid predators, and biotechnological and biorational methods.
While it is important to ensure the rational deployment of all control methods at one’s disposal in each case, integrated management of these pests also requires that actions are timed correctly and that there is appropriate monitoring in place that includes observation of population dynamics. For E. carpini, the economic threshold is currently defined at 60% of leaves occupied. For monitoring purposes, the sequential sampling method proposed by Baillod et al. in Switzerland for Panonychus ulmi (Acari: Tetranychidae) is particularly useful. In the case of C. vitis, it is difficult to establish an economic threshold, due to the lack of uniform distribution of mites in hibernating buds. These are the mites that most require monitoring, as they are the ones responsible for the most damage during the following season. Given this difficulty, the current view is that the threshold for increased vigilance during bud break is the presence of one to three mites per bud.

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In accordance with the Organic Law on the Protection of Personal Data 15/1999, of 13 December, Promotora de Exportaciones Catalanas SA (hereinafter PRODECA), whose address is Gran Via de les Corts Catalanes, 620, principal, 08007 Barcelona, with tax reg. no. NIF A58241316, declares that the images contained on the website www.smartfruitcongress.cat are included in a file belonging to PRODECA. The purpose of this file is the promotion, via its website, of the activities conducted by PRODECA – SmartfFruit IPM International Congress.

PRODECA guarantees that you may, at any time, exercise your right to access, rectify, cancel or oppose by writing to the aforesaid postal address, using the reference "PROTECCIÓN DE DATOS - SMARTFRUIT", or to the email address smartfruitcongress@smartfruitcongress.cat.

Specifically, to correctly exercise these rights you must clearly provide the following items in that communication:
- Name, surname(s) and photocopy of National Identity Document or Passport.
- Statement of the purpose of the request.
- Address for notification purposes.
PRODECA also declares that it reserves the right to delete from its website any content that it considers violates current and applicable legislation.

D’acord amb l’article 17.1 de la Llei 19/2014, la ©Generalitat de Catalunya permet la reutilització dels continguts i de les dades sempre que se'n citi la font i la data d'actualització i que no es desnaturalitzi la informació (article 8 de la Llei 37/2007) i també que no es contradigui amb una llicència específica.