The investigation of some bio-ecological properties of elm leaf beetle, xanthogaleruca luteola (Müller 1766) (Coleoptera: Chrysomelidae), on elm (Ulmus minor gled.) in Iğdır province

The elm (Ulmus spp.) is an important tree that grows as both natural and ornamental plant in Igdır and has become a symbol of Iğdır. The elm leaf beetle, Xanthogaleruca luteola (Müller, 1766) (Coleoptera, Chrysomelidae) causes significant damages to this tree. This research was conducted in order to determine the natural enemies with some bio-ecological properties of X. luteola in Iğdır province and carried out in laboratory and in nature in 2014 and 2015 years. As a result of the study, in the laboratory conditions, the incubation period of X. luteola eggs was determined 6.17 ± 0.13 days, in the first stage larva (L1) 6.7 ± 2.82 days, in second stage larva (L2) 5.47 ± 2.63 days, in 3 stages larva (L3) 11.643 ± 3.00 days. The prepupa stage and the pupa stage were completed 5.5 ± 2.44 days and 8.83 ± 1.47 days, respectively. During the female insect oviposition period, it was found that the most average number of eggs was 8.25, egg-laying at 9th day and the duration of oviposion lasting approximately 21 days, egg-laying 59.75 eggs on average. Adults in the nature were found to have passed on to the trees when the average temperature reached 14°C in the first year on 24/03/2014 and in the second year on 24/04/2015 and they gave a generation per year under Igdir conditions. Oenopia conglobata (Coleoptera: Coccinellidae) as egg predators, Oomyzus gallerucae (Fonscolombe) (Hymenoptera: Eulophidae) as egg parasitoids, Beauveria bassiana in wintering adults and an iridovirus in larva were determined from natural enemies of X. luteola. Key words: Elm, Elm leaf beetle, Bioecology, The dynamism of the population, Natural enemies.