Structural, Health, and Food Processing
Right-of-Way and Industrial Weed Control
Roadsides, railroads, utility corridors, and industrial sites
This category covers vegetation management along roads, rails, and utility lines and on industrial properties such as yards, substations, tank farms, and fence lines. The goal is often bare ground or low-growing cover, so products include residual soil sterilants (bromacil, tebuthiuron, diuron, imazapyr) with long persistence, plus contact and systemic herbicides for brush and vines.
Concepts: selectivity and residual activity; soil texture, organic matter, and depth to groundwater; roots of desirable trees extending well beyond the canopy; runoff into ditches and storm drains; and drift to adjacent crops, gardens, and water. Off-target movement is the leading complaint in this category, and the leading cause of enforcement action.
Traps: applying a soil sterilant near a well, ditch, or shallow aquifer; forgetting that residue can persist for years and prevent replanting; neglecting traffic safety - signs, cones, flaggers, high-visibility clothing; and assuming 'industrial site' means no restrictions when the label still governs.
Rule of thumb: before any sterilant job, check depth to groundwater, distance to wells and surface water, slope, and whether roots of desirable trees lie in the treated zone. If any of these is uncertain, use a contact or spot treatment instead of a residual.
Health and Food Processing
Public health and sensitive facilities
Two worlds share this category. Public health work targets mosquitoes, ticks, rodents, and other disease vectors, often with ULV adulticiding, larviciding, and residual barrier treatments. Food processing and health-care facilities target pests where contamination is the greatest risk.
Food plants: sanitation and exclusion come first. Pesticides must be labeled for the site, applied so no residue reaches food or food-contact surfaces, and often applied only when the plant is not operating. Cover or remove exposed food, follow reentry and cleanup directions, and keep records.
Health-care facilities: choose products and methods that limit exposure to patients and staff. Baits and crack-and-crevice work reduce risk compared with broadcast spraying, and notification may be required.
Traps: assuming 'food-grade' or 'natural' means unrestricted; spraying over exposed food; extending a 'food storage area' label to an entire processing line; forgetting recordkeeping and notification; and ignoring resistance in cockroaches and rodents from repeated single-product use.
Rule of thumb: if the treatment cannot be made without contacting food or food-contact surfaces, do not make it - use sanitation, exclusion, or a labeled alternative. For mosquito ULV work, follow label rate and timing, avoid spraying into inversions, and protect pollinators and open water.