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The biology and behaviour of olive bark beetles. Trends in integrated control

Mª Milagro Coca Abia

Food and Agriculture Research and Technology Centre (CITA). Plant Health Department. Government of Aragon

Olive growing in Spain suffers from damage caused by insects, specifically wood-boring species such as Phloeotribus scarabaeoides and Hylesinus toranio. A recent proliferation of the latter in Aragon caused serious crop losses. Therefore, attempts are currently underway to broaden our knowledge of these bark beetles and thus determine the differences in biology and behaviour between the two species, identify the parasitoids associated with each, and identify the most effective form of control whilst minimising use of plant protection products.

Findings reveal that both species have distinctive biological characteristics and behavioural patterns that set them apart from each other. Furthermore, the biological cycle of H. toranio is longer than that of P.scarabaeoides: H. toranio spends much of the year in galleries in the form of larvae, making it especially harmful due to its appetite for living wood. With regard to beneficial insects, a number of species of hymenopterous parasitoids have been identified that could be controlling the populations of both bark beetles, which is a crucial aspect for more sustainable pest control.

H. toranio’s preference for living wood makes it impossible to control by using wood cuttings from pruning as bait as with P. scarabaeoides. Plant protection products to control H. toraniohave been evaluated to determine which are most effective in reducing the number of active adult entries and therefore the impact of this pest and of its control measures.

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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.