It is grown widely and continuously throughout the year. It can destroy an entire crop even when intensive, but improper, chemical control measures are used. Since the 1970's, newly introduced products have remained effective against DBM for only 2-3 years. Tabashnik et al .
Resistance is caused by misuse of products.
Previously, growers solved the DBM resistance problem by switching to new and more effective products. This is no longer easy or feasible. New insecticides are rare and expensive as result of the stringent selection criteria providing safety for users, consumers, beneficial arthropods and the environment. Therefore, insecticide resistance is undesirable and unacceptable to all concerned. These products, introduced in close succession, have modes of action quite distinct from each other.