INTERACTIONS BETWEEN 2 INTRODUCED SPECIES OF WHITEFLIES IN THE MEDITERRANEAN AREA OF TURKEY - DIALEURODES-CITRI (ASHMEAD) AND PARABEMISIA-MYRICAE (KUWANA) (HEM, ALEYRODIDAE)

Two introduced species of citrus whiteflies, Dialeurodes citri and Par abemisia myricae met in the east mediterranean area of Turkey and prov ed to be ecological homologues. P. myricae is the superior competitor on account of its faster development and broader ecological niche and started to replace D. citri. After a most effective parasitoid of P. m yricae, the aphelinid Eretmocerus debachi was released and successfull y suppressed this species, D. citri recovered and became dominant even in regions where it had not been present before. In this way the othe rwise excellent economic success of the biological control of P. myric ae was partly reduced.