ABSTRACT
Integrated Pest Management has changed the former plant protection strategies in the sense that the individual pest species or disease is no longer considered in an isolated manner when suitable control measures are planned and applied. The pest or disease as well as undesirable weeds are components of an agro-ecosystem that interact with-each other in various ways. Hence, control measures have to be evaluated not only with respect to their effectiveness against the target species but also with respect to their impact on other components of the system. Biotechnical methods are of increased importance in modern IPM programs because they can exert a complementary role to biotic regulating factors acting within the agro-ecosystem. Biotechnical methods available or under investigation are reviewed in the context of citrus groves.
