Beobachtungen zur Biologie der Rübsenblattwespe Athalia rosae L. (Hym., Tenthredinidae)

The Relative Growth Rate of the larvac ofA. rosae at a temperature of 20°C amounts to 0.45–0.63 (RGR of Myzus persicae=0.17–0.39) corresponding to a doubling of the body weight within 1.1 to 1.5 days. The daily intake of plant material reached twice the amount of the respective initial body weight. The diapause ofA. rosae is induced by the photoperiod; temperature seems to be of minor importance. The onset of pigment evasion from the larval eye signalizes the termination of diapause. Diapause ended earlier at temperatures of 5°C and 12°C than at 20°C but even at the latter temperature diapausing individuals eventually yielded adults.