9.5 Category 03 Forest, Category 06 Seed Treatment & Sub-category 05S Sewer Root Control
Key Takeaways
- Category 03 Forest Pest Control covers restricted-use applications protecting forests, forest seed production areas, and forest nurseries, including large tracts such as wildlife sanctuaries, but not ornamental trees, which are Category 04, and not vertebrate pests.
- Category 06 Seed Treatment covers restricted-use pesticides applied to protect seed before packaging for shipment, and expressly excludes planter-box treatments added at planting, which are generally covered by the applicator private certification.
- Treated seed must never enter the food or feed supply; the federal competency standard at 40 C.F.R. 171.103(d)(4) requires knowledge of carriers and surface-active agents, binding and germination effects, handling and sorting hazards, misuse of treated seed, and disposal of unused treated seed.
- Sub-category 05S is Nebraska-specific: Title 25 NAC Ch 2 Sec 005.02A(1) creates the Sewer Use of Metam Sodium category for controlling plant roots in sewer lines and treatment plants, and NDA states it does not extend to public health vectors such as flies or rodents, which are Category 09.
- The 05S competency standard in Sec 005.02B(1) is explicit: secondary effects of metam sodium on downstream water bodies and on lateral and upstream residential and nonresidential sewer connections, personal protective equipment, and proper measurement, calibration, and application.
9.5 Category 03 Forest, Category 06 Seed Treatment & Sub-category 05S Sewer Root Control
Why These Three Together: None of the three is a high-volume Nebraska category, and none is offered through Pearson VUE - all three are taken at an NDA walk-in testing session. All three are on the published roster, all three have a written competency standard, and all three appear on the General Standards exam as boundary questions: which category covers which site.
Category 03: Forest Pest Control
Scope and Boundaries
NDA defines Category 03 as restricted-use applications to protect forests, forest seed production areas, and forest nurseries. The definition carries two exclusions that make good exam items:
- It does not include protection of ornamental trees - a street tree, a yard tree, or a golf-course specimen is Category 04.
- It does not include vertebrate pests - pocket gophers girdling seedlings are Category 14.
It does include larger tracts of trees that may or may not be marketable timber, such as wildlife sanctuaries.
The Competency Standard
40 C.F.R. 171.103(d)(2) asks for practical knowledge of the forest types, nurseries, and seed production areas in the jurisdiction and the pests involved, and specifically of:
- Cyclic occurrence and population dynamics as the basis for programming applications. Forest pests move in multi-year cycles; treatment is programmed from population trend data, not from the presence of a single damaged tree.
- The organisms causing harm and their vulnerability to the pesticides to be applied.
- How to determine when pesticide use is proper - the decision to treat at all.
- Selection of application method and proper use of equipment to minimize non-target exposure.
- Appropriate responses to meteorological factors and adjacent land use.
- Potential for phytotoxicity, drift, persistence beyond the intended control period, and non-target exposure.
Nebraska Forest Context
Nebraska is a low forest-cover state, so Category 03 work concentrates in the Pine Ridge and Niobrara country, the Nebraska National Forest plantations, riparian corridors, conservation windbreaks, and forest and conservation tree nurseries.
| Pest | Host | Management Note |
|---|---|---|
| Pine wilt disease (pinewood nematode vectored by pine sawyer beetles) | Scots and Austrian pine | Sanitation is the control: fell, chip, or burn dead pines before beetle emergence in spring. Preventive trunk injection of abamectin is a high-value-tree tool, not a stand treatment |
| Mountain pine beetle and Ips engraver beetles | Ponderosa pine | Preventive bole sprays on high-value trees; thin dense stands to reduce drought stress |
| Emerald ash borer | Green and white ash | Confirmed in eastern Nebraska; treatment is a per-tree decision, and forest-scale eradication is not achievable |
| Eastern redcedar encroachment | Grassland and pasture | Managed as woody invasion with herbicides and prescribed fire; on rangeland this is Category 01 work, in a forest setting Category 03 |
| Cottonwood and willow defoliators, tent caterpillars | Riparian hardwoods | Usually cyclical and tolerable; treat only when the population trend and stand value justify it |
Practical Compliance Points
Forest applications often sit next to water and inside habitat for listed species, so the Bulletins Live! Two check within six months of application and the label buffer to surface water usually control the job. Aerial forest application requires Category 12 in addition to Category 03.
Category 06: Seed Treatment
Scope and Boundaries
NDA defines Category 06 as the use of restricted-use pesticides to protect seeds, and draws a sharp line: the category includes treatment of seeds prior to packaging for shipment, but not planter-box seed treatments added at the time of planting, which are generally covered by the applicator private certification. Commercial seed conditioning plants, mobile seed treaters, and custom treating operations are the Category 06 population.
The Competency Standard
40 C.F.R. 171.103(d)(4) requires practical knowledge of:
- Recognizing the types of seeds to be treated.
- The effects of carriers and surface-active agents on pesticide binding and germination. Too little binder and the treatment dusts off in handling; too much, or the wrong solvent, and germination is injured.
- The hazards associated with handling, sorting, and mixing, and misuse of treated seed.
- The importance of proper application technique to avoid harm to non-target organisms.
- Proper disposal of unused treated seeds.
The Central Rule: Treated Seed Is Not Food or Feed
Treated seed carries a fungicide, insecticide, or both at concentrations never intended for consumption. It must be colored with a dye so it cannot be mistaken for commodity grain, and it must never be sold, fed, blended into grain, or delivered to an elevator. Spilled treated seed at a loading site is a documented cause of bird and small-mammal kills and must be cleaned up and covered immediately.
Unused treated seed is disposed of according to the label - commonly by planting it at a labeled rate on a labeled site, or by delivery to a hazardous waste or approved disposal facility. It is never landfilled loose, never burned, and never dumped in a field corner.
Worker Exposure and Dust-Off
Seed treating is a dust and dermal exposure job. Fine treatment dust abraded off during augering, conveying, and bagging - dust-off - carries the active ingredient into the breathing zone and, when planting equipment exhausts it, into the air near flowering plants, which is the recognized route for neonicotinoid exposure to pollinators. Controls are engineering first: enclosed treaters, local exhaust ventilation, well-adjusted equipment, and seed lubricants that reduce abrasion; then respiratory protection, chemical-resistant gloves, and coveralls per the label.
Sub-category 05S: Sewer Root Control
Scope
05S is one of the four Nebraska-created categories added by Title 25 NAC Chapter 2, Section 005.02A(1), titled Sewer Use of Metam Sodium: the use of restricted-use pesticides in sewer lines and treatment plants for the control of plant roots. NDA is explicit that it does not cover public health vectors such as flies or rodents in sewers - that is Category 09.
The Nebraska Competency Standard
Section 005.02B(1) is unusually concrete, and it is the best possible study guide for this exam. Competency standards include demonstration of practical knowledge of:
- The secondary effects of metam sodium on downstream water bodies - streams, rivers, ponds, and groundwater.
- The secondary effects on lateral and upstream residential and nonresidential sewer connections.
- The importance and use of personal protective equipment.
- Proper measurement, calibration, and application of metam sodium.
Read item 2 carefully, because it is the distinctive hazard of this work. Metam sodium breaks down to methyl isothiocyanate (MITC), a volatile gas. Sewer laterals connect to buildings. If MITC vapor migrates up a lateral into a structure - especially one with a dry floor drain or trap - occupants are exposed to a potent lachrymator and respiratory irritant inside their own building. That is why notification of connected properties, verification that traps are charged with water, and controlled application rates matter more here than raw efficacy.
Item 1 is the downstream half of the same problem: metam sodium and MITC are acutely toxic to fish and aquatic life, and a treatment plant discharge or an overflow event can carry the material into surface water.
Operational Practice
- Know the system. Map the line segment, the manholes at each end, the connected laterals, and the distance to the treatment plant or any outfall.
- Coordinate with the utility. Municipal wastewater operators must know the application is happening so plant biology and monitoring can be managed.
- Notify connected properties and confirm that floor drains and traps are filled with water before treatment.
- Measure and calibrate. The standard names measurement and calibration explicitly; dosage is set by pipe diameter and segment length, which means volume math again.
- PPE. MITC vapor is a severe eye and respiratory irritant. Follow the label for respiratory protection, goggles, and chemical-resistant gloves, and work upwind of open manholes.
- Confined space. Entering a manhole is a permit-required confined space entry with its own atmospheric testing, ventilation, attendant, and rescue requirements - separate from, and additional to, pesticide rules.
A Nebraska municipality hires a contractor to inject a metam sodium foam into a sanitary sewer segment to kill invading tree roots. Under Title 25 NAC Chapter 2, Section 005.02B(1), which hazard must the applicator specifically understand?
A custom seed treater has 40 bushels of dyed, fungicide-treated soybean seed left over at the end of planting season. What is the correct disposition?
Which application requires Nebraska Category 03 Forest Pest Control certification rather than another category?