covariation of the number of damaged pine needles and the degree of their impairment by brachyderes incanus (L.) coleoptera, Curculionidae)

摘要

In Pinus sylvestris L. cultivations, subject toinvestigation was the degree of needle damage by cockchafers of Brachyderes incanus (L.) on the branches of the highest verticil. A wide range of feeding traces was found. There was a significant correlation between the number of damaged needles and the degree of their impairment.