The catch of leaf tortricids moths to pheromone traps in apple orchards. Part II. Structure of number

Abstract

The purpose of the three years of studies was to establish the population structure of selected species of leaf tortricids in particular types of apple orchards on the basis of the catch into pheromone traps. Four out of the five studied species of leaf tortricids were caught in the orchard without any chemical protection. Those were: Spilonota ocellana, Adoxophyes orana, Pandemis cerasana and Pandemis heparana. On the other hand, those species were least numerous in the intensively protected orchard. The differences in the number of the caught males in those two apple orchards, which significantly differed from each other with the system of plant protection, were considerable. In each of the studied orchards the dominating species was S. ocellana.