Pre- and Postfrontal Influences on Light Trapping of Winter Moth (Operophtera brumata L.)

Abstract

Light trap catches of the winter moth (Operophtera brumata L.) getting from the data of national light-trap network were analysed in connection with weather fronts. It is concluded, that weather fronts modify the catches of light traps according to their specific characters (main types) and according to their successions. It is worthy of attention, however, that even in those cases in which the front reduces the number of insects caught, pre- and post-frontal influences often manifest themselves in an increase of the number of collected specimens. Because of the frequency of weather fronts it would be useful to take their effects into consideration on the quantity of insects captured at lighttraps. It is necessary to improve the applied method for this purpose.