1 Work of sawfly on willow leaves 



Locust leaf miner, O d o n t o t a dorsal is Thunb. 



2 Work of beetles 



Brown tail moth, Euproctis chrysorrhoca Linn. 



3 Two characteristic nests 



Pitch-mass borer, P a r Ji a r ni o n i a pini KcU. 



4 Pitch mass with empty cocoon protrudiny 



