ABSTRACT
ABSTRACT
Evolution of pesticide resistance in Arthropods is a very widespread phenomenon
that involves scientific as well as social and economic problems. Cited cases
in the literature are numerous with special references to species of anthropic
environments. This is related to strong selective pressure on these species,
exerted using many pesticides (chlororganic more than the others). Resistance
is considered a phenomenon conferring adaptation in presence of pesticides and
depending on three kinds of factors: genetic, biological/environmental,
operational. Just operational factors - including timing, dose and formulation
of pesticides used - are under man's control. However, devising management
strategies for delaying or forestalling the evolution of pesticide resistance
requires a thorough understanding of all the parameters influencing the
selection process. At the present time, three different strategies have been
experimented with: saturation, moderation, multiple attack. Important
contributions could be derived in the future by the use of "expert systems,"
not yet applicable. High agricultural costs associated with resistance to
pesticides require further efforts for better understanding of the general
problem and its control.