Monterey Nematode Control (Quart) is an OMRI-listed, organic liquid concentrate for home gardens, lawns, and orchards, using saponins from the Quillaja saponaria tree to control root-parasitic nematodes by disrupting their development, best used as a preventative soil drench before nematode populations boom, and requires careful watering afterward to keep it in the root zone. It's safe for vegetables, fruits, and ornamentals, even up to harvest, and covers 3,000-4,000 sq ft per quart.