When might use of genetic biocontrol be a good option ?

There are a number of conditions in which genetic biocontrol approaches can be useful. For example, when other control strategies are or are becoming ineffective, as is the case with development of pesticide resistance in insects or weeds. Like classical biocontrol, genetic biocontrol strategies can be a powerful adjunct to pesticide-based strategies and reduce our dependence upon them. Genetic biocontrol can also be useful in situations where conventional chemical approaches cannot fully address the problem because it is so difficult or expensive to deliver these approaches in areas where pests breed or cause damage. Living biocontrol organisms have the advantage of being biologically inclined to seek out the pest they are intended to control, simplifying delivery. Additionally, genetic biocontrol may be considered by some as more environmentally friendly or humane than chemical approaches.