عنوان مقاله [English]
نویسندگان [English]چکیده [English]
For identification and morphological investigation on elm bark beetles species during 2011, sampling was carried out on weaken trees in central area of Guilan province. A total of three species Scolytus pygmaeus (Fabricius, 1787), S. ecksteini (Butovitsch1929) and S. ensifer (Eichhoff, 1881) were identified. Morphological index (spine on the lower margin of abdominal segment) which is an important character for identification of different species in the genus Scolytus was compared in identified species. The Results indicated that Scolytus pygmaeus and Scolytus ensifer are the most and the least abundant species, respectively. A key also was provided for identification of species.