Comment by ldiracdelta

Unless the farmer is a moron, IPM is how most farmers try to use pesticides. Pesticides and chemical applications can be very expensive. Farmers try to use the least possible amount they can for purely economic reasons. My wife's grandfather was using IPM back in the 70s. Farming is competitive. If your costs are too high, you eventually go bankrupt during bad years. For the most part IPM is the rule, not the exception. Purely limited by the farmer's ability to understand pest cycles.