First report of Coptodisca lucifluella in pecan orchards, Carya illinoinensis in Mexico.
Pecan, Carya illinoinensis (Wang.) K. Koch, is one of the most important crops in northern Mexico. In the Comarca Lagunera, infestations and foliar damage by a micro lepidopteran of the genus Coptodisca Walsinham (Lepidoptera: Heliozelidae), locally called "minador de aretes" (shield leafminer), has been detected in pecans for the past three years. The shield leafminer was identified as Coptodisca lucifluella (Clemens), the only species of Coptodisca known to attack pecans. Coptodisca lucifluella is reported here for the first time in Mexico. In 2012, samplings of this pest at the end of the pecan growing season in eight orchards of the Comarca Lagunera indicated the pest was present in all of them showing also great variation in its infestation levels and foliar damage. In 2013, samplings of this pest every two weeks throughout the growing season in four orchards of the region showed shield leafminer infestations and foliar damage were low initially and increased significantly at the beginning of August. Parasitism of C. lucifluella varied from 0 to 23.3%, depending on location and sampling date. Parasitoid specimens were in eight genera, with Baryscapus and Quadrastichus (Hymenoptera: Chalcidoidea: Eulophidae) the most abundant.