Damage analysis of Dicranura (Cerura) vinula L. (Lep.: Notodontidae) on ten native and exotic poplar clones in Bojnord, Iran

C. vinula is considered an important pest of poplar plantations in Bojnord region of Iran. Activity of the pest has been occurred on native and exotic species and clones of poplar. In this survey, we examined damage of C. vinula on 10 native and exotic poplar clones on three year seedlings in Bojnord Research station. A randomized complete block design with 3 replication was applied. Each experimental plot includes 25 poplar seedlings, but we examined the nine seedlings placed in the middle of each plot. Surveys were carried as percent damage on leave(feeding rate) at 15 days interval starting end of March until the end of September. Data were analyzed by SAS program and the average of damage on treatments was compared by Duncan means test. Based on the obtained results in 1996, there is significant differences among tested clones (α=1%). The highest damage was seen on Populous x. euramericana561.41 clone, but the least were seen on P.alba Beshghardash (a native clone of the region) While P.deltoides 69.55. and P.alba 44.9 clons were Completely immune to the pest.