FLIGHT PATTERNS OF THE PEACH TWIG BORER, ANARSIA-LINEATELLA ZELL (LEP, GELECHIIDAE) IN CENTRAL-EUROPE AS OBSERVED USING PHEROMONE TRAPS

Pheromone traps were used for monitoring phenology of the peach twig b orer, Anarsia lineatella, in Central Bohemia. The pest has two generat ions a year, the first one (owerwintering) is usually more numerous th an the second one. The peak of the flight of the first generation begi ns by day-degrees (DD) 400-450 degrees C and the peak of the flight of the second generation at DD 900-960 degrees C. DD data can be used fo r supervised control both in the case of timing the chemical treatment and for deciding on using pheromones for male confusion. The suitable term for chemical treatment in the given locality in Central Bohemia is DD 360 degrees C (above the developmental threshold 10 degrees C). The injury to fruits and shoots of peach trees similar to that caused by A. lineatella does also the oriental fruit moth, Cydia molesta. Acc ording to very low catches in pheromone traps C. molesta does not seem to be economically important in Central Bohemia at present.