Fagaceae, Dumortier, 1829

Pérez-Otero, R., Crespo, D. & Mansilla, J. P., 2017, Dryocosmus kuriphilus Yasumatsu, 1951 (Hymenoptera: Cynipidae) in Galicia (NW Spain): pest dispersion, associated parasitoids and first biological control attempts., Arquivos Entomolóxicos 17, pp. 439-448 : 441-442

Fagaceae and Castanea hybrids resistance

Seventeen Spanish (especially Galician and Andalusian) Castanea hybrids cultivars were planted in two controlled enclosures sealed with anti-trips net and double entrance. Cultivars were exposed to D. kuriphilus to assess their natural resistance. Considered cultivArs were “FAmosA”, “InxertA”, “JudiA R”, “LongAl”, “MArtAiÑA”, “PArede”, “AmArelAnte”, “ChAmbergA”, “ComisAriA”, “HelechAl”, “LuguesA”, “NegrAl”, “PilongA”, “PlAntA AlAJAr”, “TemprAnA”, “VenturA” And “VerAtA” (see CUENCA VARELA & MAJADA GUIJO, 2014 for more varietal information). “Bouche de Bétizac”, a resistant hybrid between Castanea sativa and C. crenata ( BOTTA et al., 2010) was planted as well. Seven cultivars were planted in January 2015 in one enclosure and 13 were planted in April 2016 in another one. The first one was exposed to a release of 1594 female wasps between June and August 2015 whereas the latter was semiforced defiled by communicating it with a contaminated enclosure during the D. kuriphilus flight period in 2016. Ten replicates were planted for each cultivar. Gall presence was biweekly studied in the chestnut vegetative period, although the results are expressed monthly.

We have included in our experiments three extra Fagaceae species ( Quercus robur L., Quercus ilex L. and Quercus suber L.), which were exposed to D. kuriphilus in a separated enclosure to assess gall formation feasibility.