How to properly use beneficial insects to control garden pests.
Although chemical pesticides are widely used in many agricultural systems, the complete reliance on chemicals is no longer a feasible approach to pest control for the following reasons:
The major disadvantage which continues to erode the effectiveness of conventional insecticides is the ability of the pests to develop resistance. Approximately 500 insects and related pests (mites) have shown resistance. In fact, some cannot be controlled with today’s chemical arsenal.
Secondary Pest Problem
Even chemicals which are effective against pests often kill or interfere with beneficial insects and other organisms. The situation created then allows an insect (not the usual pest, but another insect taking advantage of the available food) to rapidly increase in number since no predators are in the field to prevent the population explosion. Sometimes the resulting (long-term and economic) damage is greater by the secondary pest than by the pest originally targeted. (more…)