Increasingly, farmers and researchers are exploring ways to control pest populations through the use of predator insects. Many bugs such as lacewings, preying mantises, ladybugs and parasitic wasps can be used to keep various pests in check. Many common cover crops, such as clover and buckwheat, can be used to attract beneficial insects.
These predators are an ideal form of pest control because they work for free. Purdue University Entomologist, Bob O’neill estimated that soybean farmers could save $10-$12 per acre on insecticides if they would use pirate bugs to help control the aphid populations. However, when farmers use insecticides, the good insects are killed along with the bad. As O’neill said, “It’s sort of akin to taking the bank guard out of the bank.” Many of these beneficial insects are quite efficient. A ladybug can eat 30-40 aphids per day.
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