There are a large variety of pests that can ruin a fruit harvest. Finding worms on your fruit trees may be the beginning of a large infestation. Identification of the species of worms is critical so a proper spray application schedule can be created for eradication of the pest. If you don't know what you're spraying for, not only will extra money be spent by using perhaps the wrong chemical, but you may also damage the fruit trees. Only once the worm is clearly identified, will a chemical approach be successful.
Inspect the fruit trees that show signs of worm damage. Open any closed leaves that have small white webs.
Collect the worms and seal them in a glass jar. If there is more than one type of worm, place the different worms in separate containers.
Consult your local agricultural extension service agent. Take the worms to their office. They will inspect and identify the species of worms you have collected. In most cases, the experience of the service agent is so complete, they can take one look at the specimen and identify the pest. They will recommend an insecticide program for your fruit trees. In some instances, they may even have discounts on the indicated chemical treatment if there is a wide-spread problem in your area.
Mix the insecticide according to the manufacturers instructions or the extension agent's application schedule.
Add the chemical to a garden sprayer. Cover the areas of the trees the agent specifies. This may also include areas on the ground surrounding the trees.
Inspect the trees on a daily basis. Keep an eye out for any damage to foliage, and for worm elimination. It may turn out to be a trial-and-error application of the insecticide, depending on the species of worms. Repeat spraying as directed.