They must be treated with intelligence and respect to avoid environmental and health-related problems. Reducing the quantity of chemicals used should be a top priority. IPM is described in detail in Chapter 3 and pesticide usage in Chapter 4. Examine all application techniques and calibrate all sprayers. Good intentions can be counteracted if equipment isn t functioning properly.
Pesticides vary significantly in efficacy, leachability, and toxicity.
Choose pesticides that are recommended for the specific problem at hand. If more than one pesticide is available, choose the one least likely to harm the environment. Plant disease diagnosis can be a complicated matter, but it is essential to avoid unnecessary or inappropriate use of a pesticide. Be sure to rule out environmental factors before turning to pesticides. If the cause isn t clear-cut, send a sample to a plant disease diagnostic laboratory.