- The problem area needs more personal attention.
- Nonchemical control is hard work, so it may be better for small areas. This depends on the available labor supply.
- In some years, you may suffer more damage than you thought you would, including more loss of produce or plants.
- There are some pests (insects, weeds, or pathogens) for which effective nonchemical management methods are not available.
During the planning stages, be careful about information on nonchemical control in popular magazines and newspapers. Writers often report on only a few observations. For example, if a grower reports having one tomato plant where he successfully used wood ashes to control aphids, question whether aphids would have been a problem without using ashes. Personal experiences are good, but respected tests in your farming area mean more.
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