Pesticide Labels, Label Interpretation, and Safety Data Sheets
The label is the law
The label is a legal document; using a product in a manner inconsistent with its labeling is a violation of federal law. Learn the boxes. The ingredient statement lists active ingredients by percentage and by pounds per gallon (or pounds per pound) plus inert ingredients. The EPA registration number identifies the registered product; a restricted-use product carries a statement limiting purchase and use to certified applicators. The signal word and precautionary statements section gives hazard information, required PPE, and first aid. The directions for use box is where you find target sites, rates, application methods, dilution, tank-mix partners, restricted entry interval (REI), pre-harvest interval (PHI), and storage/disposal instructions. A separate Agricultural Use Requirements box carries Worker Protection Standard information.
Supplemental and special labels
- Section 3 is the normal registered label.
- Section 24(c) special local need labels are state-issued for a specific problem in that state.
- Section 18 is an emergency exemption for an unregistered use, usually time-limited.
- Section 2(ee) recommendations permit limited deviations (e.g., a lower rate or an additional pest) but do not authorize a lower REI or reduced PPE.
Safety Data Sheets
The 16-section SDS supports, but never replaces, the label. Section 4 is first aid, Section 7 handling and storage, Section 8 exposure controls/PPE, Section 9 physical properties. If the SDS and label conflict on use, follow the label.
Traps
Questions often test whether you know the label - not the SDS - dictates use, that a 2(ee) recommendation cannot reduce PPE or REI, and that tank mixing is only allowed when the label permits it.
Rule of thumb: read the label three times - before buying, before mixing, and before spraying - and never exceed the maximum labeled rate or frequency.