Many insects depend on vital components for the survival and continuation of their species.
These environmental and ecological factors include but are not limited to available food supply and quality, temperature, population density and predato r numbers. Chemical insecticide application practices have been and still are under scrutiny for at least the last 15-20 years and possibly more. The insecticides have been b lamed for many things ranging from water contamination to possible health linked problems. Biological control of insects is a fairly new concept in agriculture that has been slowly introduced in the last several decades. Biological control still needs to be examined to see the effectiveness it has in the long term, but seems to be the next most promising alternative to just strictly environmental unfriendly chemical control.