State rules restrict the use of a number of pesticides to certified applicators or to persons under the direct supervision of certified applicators. State restricted use pesticides which may be used in orchards include simazine, diuron and 2,4-D (except salt formulations distributed in quantities of one gallon or less; dry formulations labeled and intended only for home and garden use or for turf). The state of Washington has declared certain pesticides restricted for the protection of groundwater; they are footnoted in the Signal Word Chart. For a complete list refer to WAC 16-228-1231 of WSDA’s General Pesticide Rules. All Section 24(c) SLN registrations and Section 18 emergency exemptions which have a state restricted use pesticide designation will display that information in a prominent place on the label.
Federal regulations also restrict the use of a number of pesticides to certified applicators or to persons under their direct supervision. The restricted use pesticide statement must appear at the top of the first page of the product label.
It is illegal to sell or deliver any restricted use pesticide to a person unless that person is a certified pesticide applicator or a certified applicator's authorized agent.