Beneficial organisms attack pests, not people, plants or pets. Beneficials are not pesticides; they need some lead time to work. They should be used as part of an integrated system of pest management which also includes fertilizing, hygienic cultural practices, planting pest-resistant varieties, intercropping, proper irrigation, monitoring, trapping, etc. For maximum effectiveness, beneficial releases should begin when pest densities are at low to medium levels. If your pest problem is already severe, it may be better to apply a safe, short-residual pesticide to kill a portion of the pests and then introduce the beneficials. All of our beneficials are sent with instructions for release.