MO Pesticide Applicator cheat sheet

Missouri pesticide law is administered by the Missouri Department of Agriculture under the Missouri Pesticide Use Act (RSMo 281); private applicators certify through the University of Missouri Extension and must recertify every 5 years.

Certification categories in Missouri include private applicator (agricultural commodity production), commercial applicator (for hire or on property of others), and public operator (government employees); each certification is category-specific.

A pesticide label is a legal document: use inconsistent with the label is a violation of FIFRA, and Missouri may assess civil penalties plus license suspension or revocation for misuse.

Signal words rank acute toxicity: DANGER-POISON with skull and crossbones (Category I, oral LD50 up to 50 mg/kg), DANGER (Category I), WARNING (Category II), CAUTION (Category III/IV); the signal word must appear on the front panel.

PPE statements on the label are the minimum; label-specified PPE cannot be reduced, but it may be increased. Chemical-resistant gloves, boots, and aprons are required by many agricultural labels during mixing and loading.

Restricted-entry interval (REI) is the minimum time after application before workers may enter without label-required PPE; early entry requires the label's early-entry PPE and, for many labels, a 2-hour training.

Worker Protection Standard requires notification of workers, decontamination supplies within 1/4 mile of the handling site, and pesticide safety training every 12 months for agricultural workers and handlers.

Spill response order: protect people, stop the source, contain the spill with absorbent/soil berms, cover volatile spills, then clean up and dispose per label and Missouri solid/hazardous waste rules; report significant releases to the Missouri Department of Natural Resources.

Recordkeeping: certified applicators must keep application records (product, EPA registration number, rate, date, location, applicator, and for restricted-use pesticides the certified applicator's name) for at least 2 years.

Economic threshold is the pest density at which the cost of control equals the value of the crop loss prevented; treat at threshold, not at first sighting, and re-scout after the pre-harvest interval allows.

Pre-harvest interval (PHI) is the minimum days between application and harvest; it varies by crop and product and is on the label - never shorten it, and check grazing/forage restrictions separately.

Integrated pest management sequence: identify the pest, monitor with scouting or traps, use cultural and biological controls first, then rotate among chemical mode-of-action groups to delay resistance.

Weed resistance management: rotate herbicide sites of action (WSSA group numbers), use tank mixes with multiple effective modes of action, and include non-chemical tactics; repeated use of one group selects resistant biotypes.

Drift management: apply when wind is 3-10 mph and blowing away from sensitive areas, use low-drift nozzles, keep boom height low, and observe buffer zones and temperature/humidity inversions that hold droplets aloft.

Sprayer calibration by the 1/128-acre method: measure output from one nozzle over a known time, then gallons per acre = ounces collected x 128 / nozzle spacing in inches (for 1/128 acre calibration).

Seed-applied and soil insecticides target below-ground pests (wireworm, seedcorn maggot, white grub); foliar rescue treatments are timed to insect stages such as tassel emergence for corn earworm or pod set for soybean aphid.

Animal pesticide uses fall under FDA/EPA-approved labels for livestock, poultry, and their premises; use of a product on a species or site not listed on the label is off-label and illegal.

Withdrawal time is the minimum interval between the last pesticide application and slaughter or sale of milk/eggs; it is product- and species-specific and must be observed to avoid illegal residues.

Ectoparasite control includes back rubbers, dust bags, pour-ons, ear tags, and sprays for horn flies, lice, and ticks; rotate insecticide classes because horn flies rapidly develop resistance.

Horn fly economic threshold is roughly 200 flies per animal side; stable fly and face fly thresholds differ, so identify the species before treating.

Rodent and bird control in livestock facilities relies on sanitation, exclusion, and baiting; rodenticide placement must be secured in tamper-resistant stations inaccessible to livestock, pets, and children.

Pesticide storage and mixing must be separated from feed, feed ingredients, and animal contact surfaces; contaminated feed or equipment causes illegal residues in meat and milk.

Restricted-use products for livestock require a certified applicator, and application records should capture species, animal count, product, rate, date, and withdrawal period.

Forest pest management targets insects (bark beetles, defoliators like gypsy moth and spongy moth), diseases (oak wilt, annosus root rot), and competing vegetation; silvicultural practices are the first line of defense.

Bark beetle control relies on hazard rating, sanitation cutting, prompt removal or treatment of infested trees, and anti-aggregation pheromones (verbenone) rather than broad-spectrum sprays.

Oak wilt spreads by root grafts and sap-feeding beetles; control includes severing root grafts with a trencher or plow, avoiding pruning in spring, and prompt removal of infected trees.

Aerial application requires careful drift management: buffer zones near water and sensitive areas, favorable wind, and droplet size control to reduce off-target movement over large blocks.

Herbicide site preparation and release treatments in forestry use labeled rates and surfactants; conifer tolerance differs by species and age, so check the label for species selectivity.

Pesticide use in forests must protect pollinators, aquatic resources, and threatened/endangered species; check for county-specific endangered species bulletins and label restrictions before application.

Recordkeeping and notification: forest applications often require advance notice to adjacent landowners and beekeepers when labels specify, and records must be retained per Missouri rules.

Turfgrass weed control: preemergence herbicides (e.g., prodiamine, pendimethalin) must be applied before weed germination; postemergence products are selected by grass vs. broadleaf and by cool- vs. warm-season turf tolerance.

Turf disease diagnosis depends on correct identification (dollar spot, brown patch, Pythium blight, gray leaf spot); fungicide programs rotate FRAC groups to prevent resistance and are timed to weather and disease models.

Ornamental phytotoxicity risk rises with high temperatures, drought stress, and tank mixes; test on a small area and avoid applications to newly planted or blooming plants when labels restrict them.

Insect control on ornamentals includes systemic products for sap feeders (aphids, scales, whiteflies) and contact products for caterpillars; protect pollinators by avoiding sprays on blooming plants.

Drift and runoff protection: maintain buffer strips near water, avoid application to impervious surfaces, and do not irrigate or allow rain runoff to carry product into storm drains.

Calibration and nozzle selection matter on turf: use flat-fan nozzles for broadcast, adjust pressure and speed, and apply in 1-2 gallons per 1,000 sq ft for most turf sprays.

Pollinator protection: many ornamental and turf labels prohibit application to blooming plants or require application after bloom; follow the label's bee advisory and avoid neonicotinoid use on flowering plants attractive to pollinators.

Seed treatment targets seed- and soil-borne pathogens and early-season insects (seedcorn maggot, wireworm, damping-off); fungicide and insecticide components are often combined as a pre-mix.

Seed treatment labels specify rate per 100 lb of seed and per acre at a given seeding rate; calculate the amount per seed lot and calibrate the treater to deliver the labeled rate uniformly.

Seed treatment requires commercial seed treating equipment with dust control; treated seed must be colored with a dye and labeled as treated, and treated seed must never be used for food, feed, or oil.

Worker protection: seed treatment is a pesticide handling activity requiring label PPE, and dust from treated seed is a route of exposure - control dust and clean equipment after use.

Pollinator risk: neonicotinoid seed treatments can produce dust that harms bees; follow label dust-reduction measures and avoid planting near blooming crops when dust drift is likely.

Recordkeeping includes lot number, product, rate, date, and treater identity; retain records per Missouri and FIFRA requirements for at least 2 years.

Storage and disposal: store treated seed separate from untreated seed and feed, and dispose of leftover treated seed per label and state rules - never feed it to livestock.

Aquatic herbicides are classified as either contact (e.g., diquat, endothall) or systemic (e.g., glyphosate, 2,4-D, fluridone); systemic products move into roots and are better for long-term control of rooted plants.

Missouri requires a permit from the Missouri Department of Natural Resources for aquatic pesticide application to waters of the state; apply only after the permit is issued and follow its conditions.

Dissolved oxygen depletion is a major risk: treating large areas of vegetation at once causes plant decay that consumes oxygen and can kill fish; treat in sections and monitor oxygen.

Algae control differs from vascular plant control; identify the target (filamentous algae, planktonic algae, submersed, emergent, or floating plants) because product selection and rates differ.

Buffer zones and setback distances from potable water intakes, wells, and sensitive areas are label- and permit-specific; notify water users as required before application.

Application timing affects efficacy: treat floating and emergent plants when actively growing, and avoid applications during fish spawning or when irrigation water will be used, per label restrictions.

Recordkeeping must include water body, acreage treated, product, rate, date, permit number, and applicator; retain records per state requirements.

Sewer root control uses herbicides such as metam sodium or dichlobenil applied as foams or liquids into sewer lines to kill roots that have intruded through joints and cracks.

Application requires coordination with the wastewater utility; workers must control fumes and ventilation, and confined-space entry rules apply to sewer work.

Foam application is preferred because it contacts roots along the pipe wall and limits the volume of product entering the collection system and downstream treatment plant.

Label and permit conditions set maximum concentration and volume; never exceed them, and monitor for product reaching the treatment plant or surface water.

Root control is a maintenance cycle, not a one-time fix: roots regrow, so repeat treatments are scheduled based on inspection and CCTV records.

Safety: sewer gas, chemical vapors, and traffic hazards require confined-space procedures, respiratory protection when specified, and traffic control at manholes.

Records should include line segment, location, product, concentration, volume, date, and crew, plus notification to the utility and any required reporting.

Right-of-way vegetation management uses bare-ground (soil residual) herbicides, foliar contact/systemic products, cut-stump treatments, and basal applications; select the method by target species and site.

Drift and runoff protection is critical near roads, railways, and utility corridors: use low-drift nozzles, buffer zones near water and sensitive crops, and avoid application when wind favors off-target movement.

Utility rights-of-way must protect compatible vegetation and pollinator habitat; integrated vegetation management favors low-growing compatible plants over bare ground where feasible.

Aquatic-adjacent applications require aquatic-labeled products and may need a state permit; check setbacks from wells, streams, and drainage ditches.

Cut-stump and basal treatments target woody species like tree-of-heaven, honeysuckle, and poison ivy; apply to freshly cut cambium or lower stem for translocation into roots.

Traffic control and worker safety: high-visibility clothing, signage, and lane closures are required when working on roads and railways, and applicators must follow state and local traffic rules.

Recordkeeping includes location, product, rate, method, date, and applicator; retain records per Missouri rules and notify adjacent landowners where required.

Structural pest control covers cockroaches, ants, rodents, spiders, and other pests in and around buildings; integrated pest management uses inspection, sanitation, exclusion, and targeted pesticide use.

Crack-and-crevice and baiting reduce exposure risk: gel baits and tamper-resistant bait stations are preferred indoors, and broadcast sprays are limited to labeled sites.

Ant and cockroach control requires species identification and understanding of foraging and nesting behavior; baiting depends on placing bait where foragers will find it and avoiding repellent sprays nearby.

Rodent control uses snap traps, glue boards, and tamper-resistant bait stations; rodenticide placement must be secured and labeled, and secondary poisoning risk to pets and wildlife must be managed.

Labeled sites matter: a product labeled for agricultural or outdoor use cannot be applied indoors, and indoor applications must follow the label's site and method restrictions.

Missouri structural applicators are certified in categories and must follow state rules for notification, recordkeeping, and re-entry intervals in treated spaces.

Safety: ventilation, PPE, and re-entry times protect occupants; treated areas should be posted or occupants notified as the label and state rules require.

Termite control distinguishes subterranean termites (soil-dwelling, need moisture) from drywood and dampwood termites; identification determines the treatment approach.

Liquid soil termiticides are applied as a continuous barrier around and under the structure; labeled concentration and application rate per linear foot and per square foot must be followed exactly.

Termite baits use monitoring stations and slow-acting toxicants; they require regular inspection and maintenance, and efficacy depends on proper station placement and monitoring.

Pre-construction treatment requires treating the soil before the slab or foundation is poured, plus treating penetrations, bath traps, and foundation walls; post-construction treatments may require drilling and injection.

Label restrictions: many termiticides limit the total amount applied per structure and per year; exceeding labeled rates is illegal and can cause off-target contamination.

Inspection and reporting: a thorough inspection documents evidence, conditions conducive to infestation, and a treatment recommendation; disclosure and warranty terms are governed by state rules.

Safety and environmental protection: termiticides must not contaminate wells, cisterns, or surface water; observe setback distances and avoid application to saturated or frozen soil.

Fumigants are gases that penetrate treated material; common examples include methyl bromide, phosphine, sulfuryl fluoride, and chloropicrin, each with specific label requirements and hazards.

Fumigation requires a fumigation management plan, a site-specific safety plan, and, for many products, a certified fumigator plus trained, medically cleared workers.

Buffer zones and monitoring: fumigant labels set buffer zones based on application rate and site; perimeter monitoring and re-entry restrictions protect bystanders and workers.

Phosphine reacts with moisture to release gas and is highly toxic; it requires sealed enclosures, gas monitoring, and strict re-entry rules - never enter a fumigated space without monitoring and PPE.

Sealing is essential: tarps, tape, and seals must contain the gas for the required exposure period; leaks reduce efficacy and endanger nearby people.

Aeration and clearance: after fumigation, the space must be aerated and cleared by monitoring before re-entry, and clearance levels must meet label requirements.

Recordkeeping includes product, rate, exposure time, monitoring results, and clearance readings; retain records per label and state rules, and report incidents as required.

Missouri pesticide law is administered by the Missouri Department of Agriculture under the Missouri Pesticide Use Act (RSMo 281); private applicators certify through the University of Missouri Extension and must recertify every 5 years.

Certification categories in Missouri include private applicator (agricultural commodity production), commercial applicator (for hire or on property of others), and public operator (government employees); each certification is category-specific.

A pesticide label is a legal document: use inconsistent with the label is a violation of FIFRA, and Missouri may assess civil penalties plus license suspension or revocation for misuse.

Signal words rank acute toxicity: DANGER-POISON with skull and crossbones (Category I, oral LD50 up to 50 mg/kg), DANGER (Category I), WARNING (Category II), CAUTION (Category III/IV); the signal word must appear on the front panel.

PPE statements on the label are the minimum; label-specified PPE cannot be reduced, but it may be increased. Chemical-resistant gloves, boots, and aprons are required by many agricultural labels during mixing and loading.

Restricted-entry interval (REI) is the minimum time after application before workers may enter without label-required PPE; early entry requires the label's early-entry PPE and, for many labels, a 2-hour training.

Worker Protection Standard requires notification of workers, decontamination supplies within 1/4 mile of the handling site, and pesticide safety training every 12 months for agricultural workers and handlers.

Spill response order: protect people, stop the source, contain the spill with absorbent/soil berms, cover volatile spills, then clean up and dispose per label and Missouri solid/hazardous waste rules; report significant releases to the Missouri Department of Natural Resources.

Recordkeeping: certified applicators must keep application records (product, EPA registration number, rate, date, location, applicator, and for restricted-use pesticides the certified applicator's name) for at least 2 years.

Economic threshold is the pest density at which the cost of control equals the value of the crop loss prevented; treat at threshold, not at first sighting, and re-scout after the pre-harvest interval allows.

Pre-harvest interval (PHI) is the minimum days between application and harvest; it varies by crop and product and is on the label - never shorten it, and check grazing/forage restrictions separately.

Integrated pest management sequence: identify the pest, monitor with scouting or traps, use cultural and biological controls first, then rotate among chemical mode-of-action groups to delay resistance.

Weed resistance management: rotate herbicide sites of action (WSSA group numbers), use tank mixes with multiple effective modes of action, and include non-chemical tactics; repeated use of one group selects resistant biotypes.

Drift management: apply when wind is 3-10 mph and blowing away from sensitive areas, use low-drift nozzles, keep boom height low, and observe buffer zones and temperature/humidity inversions that hold droplets aloft.

Sprayer calibration by the 1/128-acre method: measure output from one nozzle over a known time, then gallons per acre = ounces collected x 128 / nozzle spacing in inches (for 1/128 acre calibration).

Seed-applied and soil insecticides target below-ground pests (wireworm, seedcorn maggot, white grub); foliar rescue treatments are timed to insect stages such as tassel emergence for corn earworm or pod set for soybean aphid.

Animal pesticide uses fall under FDA/EPA-approved labels for livestock, poultry, and their premises; use of a product on a species or site not listed on the label is off-label and illegal.

Withdrawal time is the minimum interval between the last pesticide application and slaughter or sale of milk/eggs; it is product- and species-specific and must be observed to avoid illegal residues.

Ectoparasite control includes back rubbers, dust bags, pour-ons, ear tags, and sprays for horn flies, lice, and ticks; rotate insecticide classes because horn flies rapidly develop resistance.

Horn fly economic threshold is roughly 200 flies per animal side; stable fly and face fly thresholds differ, so identify the species before treating.

Rodent and bird control in livestock facilities relies on sanitation, exclusion, and baiting; rodenticide placement must be secured in tamper-resistant stations inaccessible to livestock, pets, and children.

Pesticide storage and mixing must be separated from feed, feed ingredients, and animal contact surfaces; contaminated feed or equipment causes illegal residues in meat and milk.

Restricted-use products for livestock require a certified applicator, and application records should capture species, animal count, product, rate, date, and withdrawal period.

Forest pest management targets insects (bark beetles, defoliators like gypsy moth and spongy moth), diseases (oak wilt, annosus root rot), and competing vegetation; silvicultural practices are the first line of defense.

Bark beetle control relies on hazard rating, sanitation cutting, prompt removal or treatment of infested trees, and anti-aggregation pheromones (verbenone) rather than broad-spectrum sprays.

Oak wilt spreads by root grafts and sap-feeding beetles; control includes severing root grafts with a trencher or plow, avoiding pruning in spring, and prompt removal of infected trees.

Aerial application requires careful drift management: buffer zones near water and sensitive areas, favorable wind, and droplet size control to reduce off-target movement over large blocks.

Herbicide site preparation and release treatments in forestry use labeled rates and surfactants; conifer tolerance differs by species and age, so check the label for species selectivity.

Pesticide use in forests must protect pollinators, aquatic resources, and threatened/endangered species; check for county-specific endangered species bulletins and label restrictions before application.

Recordkeeping and notification: forest applications often require advance notice to adjacent landowners and beekeepers when labels specify, and records must be retained per Missouri rules.

Turfgrass weed control: preemergence herbicides (e.g., prodiamine, pendimethalin) must be applied before weed germination; postemergence products are selected by grass vs. broadleaf and by cool- vs. warm-season turf tolerance.

Turf disease diagnosis depends on correct identification (dollar spot, brown patch, Pythium blight, gray leaf spot); fungicide programs rotate FRAC groups to prevent resistance and are timed to weather and disease models.

Ornamental phytotoxicity risk rises with high temperatures, drought stress, and tank mixes; test on a small area and avoid applications to newly planted or blooming plants when labels restrict them.

Insect control on ornamentals includes systemic products for sap feeders (aphids, scales, whiteflies) and contact products for caterpillars; protect pollinators by avoiding sprays on blooming plants.

Drift and runoff protection: maintain buffer strips near water, avoid application to impervious surfaces, and do not irrigate or allow rain runoff to carry product into storm drains.

Calibration and nozzle selection matter on turf: use flat-fan nozzles for broadcast, adjust pressure and speed, and apply in 1-2 gallons per 1,000 sq ft for most turf sprays.

Pollinator protection: many ornamental and turf labels prohibit application to blooming plants or require application after bloom; follow the label's bee advisory and avoid neonicotinoid use on flowering plants attractive to pollinators.

Seed treatment targets seed- and soil-borne pathogens and early-season insects (seedcorn maggot, wireworm, damping-off); fungicide and insecticide components are often combined as a pre-mix.

Seed treatment labels specify rate per 100 lb of seed and per acre at a given seeding rate; calculate the amount per seed lot and calibrate the treater to deliver the labeled rate uniformly.

Seed treatment requires commercial seed treating equipment with dust control; treated seed must be colored with a dye and labeled as treated, and treated seed must never be used for food, feed, or oil.

Worker protection: seed treatment is a pesticide handling activity requiring label PPE, and dust from treated seed is a route of exposure - control dust and clean equipment after use.

Pollinator risk: neonicotinoid seed treatments can produce dust that harms bees; follow label dust-reduction measures and avoid planting near blooming crops when dust drift is likely.

Recordkeeping includes lot number, product, rate, date, and treater identity; retain records per Missouri and FIFRA requirements for at least 2 years.

Storage and disposal: store treated seed separate from untreated seed and feed, and dispose of leftover treated seed per label and state rules - never feed it to livestock.

Aquatic herbicides are classified as either contact (e.g., diquat, endothall) or systemic (e.g., glyphosate, 2,4-D, fluridone); systemic products move into roots and are better for long-term control of rooted plants.

Missouri requires a permit from the Missouri Department of Natural Resources for aquatic pesticide application to waters of the state; apply only after the permit is issued and follow its conditions.

Dissolved oxygen depletion is a major risk: treating large areas of vegetation at once causes plant decay that consumes oxygen and can kill fish; treat in sections and monitor oxygen.

Algae control differs from vascular plant control; identify the target (filamentous algae, planktonic algae, submersed, emergent, or floating plants) because product selection and rates differ.

Buffer zones and setback distances from potable water intakes, wells, and sensitive areas are label- and permit-specific; notify water users as required before application.

Application timing affects efficacy: treat floating and emergent plants when actively growing, and avoid applications during fish spawning or when irrigation water will be used, per label restrictions.

Recordkeeping must include water body, acreage treated, product, rate, date, permit number, and applicator; retain records per state requirements.

Sewer root control uses herbicides such as metam sodium or dichlobenil applied as foams or liquids into sewer lines to kill roots that have intruded through joints and cracks.

Application requires coordination with the wastewater utility; workers must control fumes and ventilation, and confined-space entry rules apply to sewer work.

Foam application is preferred because it contacts roots along the pipe wall and limits the volume of product entering the collection system and downstream treatment plant.

Label and permit conditions set maximum concentration and volume; never exceed them, and monitor for product reaching the treatment plant or surface water.

Root control is a maintenance cycle, not a one-time fix: roots regrow, so repeat treatments are scheduled based on inspection and CCTV records.

Safety: sewer gas, chemical vapors, and traffic hazards require confined-space procedures, respiratory protection when specified, and traffic control at manholes.

Records should include line segment, location, product, concentration, volume, date, and crew, plus notification to the utility and any required reporting.

Right-of-way vegetation management uses bare-ground (soil residual) herbicides, foliar contact/systemic products, cut-stump treatments, and basal applications; select the method by target species and site.

Drift and runoff protection is critical near roads, railways, and utility corridors: use low-drift nozzles, buffer zones near water and sensitive crops, and avoid application when wind favors off-target movement.

Utility rights-of-way must protect compatible vegetation and pollinator habitat; integrated vegetation management favors low-growing compatible plants over bare ground where feasible.

Aquatic-adjacent applications require aquatic-labeled products and may need a state permit; check setbacks from wells, streams, and drainage ditches.

Cut-stump and basal treatments target woody species like tree-of-heaven, honeysuckle, and poison ivy; apply to freshly cut cambium or lower stem for translocation into roots.

Traffic control and worker safety: high-visibility clothing, signage, and lane closures are required when working on roads and railways, and applicators must follow state and local traffic rules.

Recordkeeping includes location, product, rate, method, date, and applicator; retain records per Missouri rules and notify adjacent landowners where required.

Structural pest control covers cockroaches, ants, rodents, spiders, and other pests in and around buildings; integrated pest management uses inspection, sanitation, exclusion, and targeted pesticide use.

Crack-and-crevice and baiting reduce exposure risk: gel baits and tamper-resistant bait stations are preferred indoors, and broadcast sprays are limited to labeled sites.

Ant and cockroach control requires species identification and understanding of foraging and nesting behavior; baiting depends on placing bait where foragers will find it and avoiding repellent sprays nearby.

Rodent control uses snap traps, glue boards, and tamper-resistant bait stations; rodenticide placement must be secured and labeled, and secondary poisoning risk to pets and wildlife must be managed.

Labeled sites matter: a product labeled for agricultural or outdoor use cannot be applied indoors, and indoor applications must follow the label's site and method restrictions.

Missouri structural applicators are certified in categories and must follow state rules for notification, recordkeeping, and re-entry intervals in treated spaces.

Safety: ventilation, PPE, and re-entry times protect occupants; treated areas should be posted or occupants notified as the label and state rules require.

Termite control distinguishes subterranean termites (soil-dwelling, need moisture) from drywood and dampwood termites; identification determines the treatment approach.

Liquid soil termiticides are applied as a continuous barrier around and under the structure; labeled concentration and application rate per linear foot and per square foot must be followed exactly.

Termite baits use monitoring stations and slow-acting toxicants; they require regular inspection and maintenance, and efficacy depends on proper station placement and monitoring.

Pre-construction treatment requires treating the soil before the slab or foundation is poured, plus treating penetrations, bath traps, and foundation walls; post-construction treatments may require drilling and injection.

Label restrictions: many termiticides limit the total amount applied per structure and per year; exceeding labeled rates is illegal and can cause off-target contamination.

Inspection and reporting: a thorough inspection documents evidence, conditions conducive to infestation, and a treatment recommendation; disclosure and warranty terms are governed by state rules.

Safety and environmental protection: termiticides must not contaminate wells, cisterns, or surface water; observe setback distances and avoid application to saturated or frozen soil.

Fumigants are gases that penetrate treated material; common examples include methyl bromide, phosphine, sulfuryl fluoride, and chloropicrin, each with specific label requirements and hazards.

Fumigation requires a fumigation management plan, a site-specific safety plan, and, for many products, a certified fumigator plus trained, medically cleared workers.

Buffer zones and monitoring: fumigant labels set buffer zones based on application rate and site; perimeter monitoring and re-entry restrictions protect bystanders and workers.

Phosphine reacts with moisture to release gas and is highly toxic; it requires sealed enclosures, gas monitoring, and strict re-entry rules - never enter a fumigated space without monitoring and PPE.

Sealing is essential: tarps, tape, and seals must contain the gas for the required exposure period; leaks reduce efficacy and endanger nearby people.

Aeration and clearance: after fumigation, the space must be aerated and cleared by monitoring before re-entry, and clearance levels must meet label requirements.

Recordkeeping includes product, rate, exposure time, monitoring results, and clearance readings; retain records per label and state rules, and report incidents as required.