A pesticide or mixture of pesticides may cause injury to certain plants. The condition under which the injury occurs may vary considerably depending upon temperature, humidity and other environmental factors. In general, it is best to apply pesticides during the cooler part of the day. Plants are less likely to be injured when protected by at least broken shade as opposed to being in direct sun. It is a good practice to water or irrigate ornamental plants one to two days before applying pesticides.
Some materials can injure plants when they are stressed for moisture.
Wettable powders are generally safer to use on plants than emulsifiable concentrates because they do not contain emulsifiers and solvents. Precautions Insecticides are poisons and should be handled as such. Read the manufacturer's label carefully before opening the container and observe all instructions and precautions. Wear rubber gloves and boots when handling and applying insecticides. Avoid breathing mists or fumes.