(IRAC Group 9C Insecticide). Beleaf is a member of the pyridinecarboxamide class of chemistry. It provides control of a wide spectrum of aphids and plant bugs by provoking rapid and irreversible feeding cessation. It controls pests by contact and ingestion. The product is registered for use on pome fruit (21-day PHI) and stone fruits (14-day PHI). No more than three applications at 2.8 oz/acre are allowed per season.