Monterey Nematode Control is used to control plant parasitic nematodes in home gardens and lawns. This pest control application uses a naturally occurring material called saponins. Saponins are detergents found in many plants, and Monterey Nematode Control uses saponins from the bark of the Quillaja tree found in South America. Saponins have been found to have rapid working action, with repellent and deterrent action, cause digestive problems, and cellular toxicity. You can Monterey Nematode Control for pre-plantings and for existing plants, including berries, citrus, grapes, nut trees, cucurbit crops, cole crops, most vegetables, ornamentals, and lawns.