Flight pattern of Archips podana (Lep.: Tortricidae) based on data from pheromone traps

Abstract

In 9 years during 1993-99 and 2001-03, the flight activity of Archips podana [A. podanus] was investigated by pheromone traps placed in 4 apple orchards in Central and East Bohemia, Czech Republic. The cumulative catches of A. podana males were plotted against time of the catch expressed in sum of degree-days (DD) above 10°C and approximated by Richards' function. Common parameters of Richards' function could be found for the overwintering generation of A. podana from all localities. The beginning, peak and end of flight activity of the overwintering generation of the A. podana population in Central and East Bohemia can be predicted by use of DD. A. podana is usually bivoltine in the Czech Republic, rarely univoltine in cold years or cold localities. The flight pattern of the summer generation of A. podana could not be constructed, because the course of flight of this generation in dependence on DD differed significantly in particular years and localities.