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Study Guides

CEPEP’s Pesticide Applicator Study Guides provide information to prepare pesticide applicators to meet Colorado’s written test requirements. Individuals seeking to be licensed in Colorado must pass the General test and at least one category where they will be making pesticide applications.

The guides published by CEPEP are described below. Click on the title to order a copy from the CEPEP store online.

Study Guide Links

Colorado Pesticide Applicators' Act and the Rules & Regulations

In addition to the material in the study guides, applicators will be tested on information found in the Colorado Pesticide Applicators’ Act along with their Rules and Regulations. The PDF files of both documents are provided through the links below: 

Category 100: General Guide

All individuals seeking a commercial pesticide applicator’s license must take the General exam. When you order a General Study guide, you will also receive a copy of the “Colorado Pesticide Applicators’ Act” and the “Rules and Regulations Pertaining to the Enforcement of the Pesticide Applicators’ Act” so you can learn the laws governing pesticide use in Colorado. 

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Category 101: Agricultural Insect Control (2006)

For individuals preparing to be licensed in the application of pesticides to agricultural plants, including applications performed on pastures, croplands, and non-crop agricultural lands, to control invertebrate pests, including insects, mites, slugs, snails and nematodes. 

This category does not qualify you to perform any type of fumigation. If you are looking to qualify for structural fumigation – such as fumigation in railcars, storage containers, grain storage silos, or other enclosures – you must obtain Category 303. If you are looking to qualify for soil fumigation, you must obtain Category 309A. For burrowing rodent fumigation, you must obtain Category 309B. 

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Category 102: Agricultural Plant Disease Control (2013)

For individuals preparing to be licensed in the application of pesticides to agricultural plants, including applications performed on pastures, croplands and non-crop agricultural lands, to control plant diseases.

This category does not qualify you to perform any type of fumigation. If you are looking to qualify for structural fumigation — such as fumigation in railcars, storage containers, grain storage silos, or other enclosures — you must obtain Category 303. If you are looking to qualify for soil fumigation or burrowing rodent fumigation you must obtain Category 309.  

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Category 103: Agricultural Weed Control (2014)

For individuals preparing to be licensed in the application of pesticides to agricultural lands, including pastures, croplands and non-crop agricultural lands, to control weeds.  

This category does not qualify you to perform any type of fumigation. If you are looking to qualify for structural fumigation – such as fumigation in railcars, storage containers, grain storage silos, or other enclosures – you must obtain Category 303. If you are looking to qualify for soil fumigation, you must obtain Category 309A. For burrowing rodent fumigation, you must obtain Category 309B. 

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Category 104: Agricultural Seed Treatment (2019)

For individuals preparing to be licensed in the application of pesticides to seeds on agricultural establishments as defined at 40 C.F.R. § 170.3 (as incorporated herein by reference) or seed treatment facilities. 

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Category 105: Livestock Pest Control (2020)

For individuals preparing to be licensed in the application of pesticides to livestock. 

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Category 106: Forest Pest Control (2006)

For individuals preparing to be licensed in the application of pesticides in forests, forest nurseries, forest seed producing areas managed for the production of timber and other forest products or maintained as wood vegetation for such indirect benefits as protection of catchment areas or public recreation, including windbreaks and downed timber.

For applications in forested areas within fifty (50) feet of a residential or commercial structure, an applicator must also hold the ornamental pest control category in accordance with Part 9 of these Rules and comply with all of the posting and notification requirements in Section 35-10-112, C.R.S., of the Pesticide Applicators’ Act.

This additional certification in the ornamental pest control category shall not apply to aerial applicators or ground applications made by federal, state, or local governments on property they own. This category does not apply to pesticide applications made to control vertebrate pests. 

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Category 107: Rangeland Pest Control (2009)

For individuals preparing to be licensed in the application of pesticides to land which is not managed for turf, pasture or forest on which the vegetation is predominantly native plant species or introduced species managed as native species such as grasses, grass-like plants, forbs or shrubs. Rangelands include but are not limited to natural grasslands, shrublands, deserts, tundras, and meadows.

For applications performed in rangeland areas within fifty (50) feet of a residential or commercial structure, an applicator must also hold the turf pest control category in accordance with Part 9 of these Rules and comply with all of the posting and notification requirements in Section 35-10-112, C.R.S., of the Pesticide Applicators’ Act.

This additional certification in the turf pest control category shall not apply to aerial applicators or ground applications made by federal, state, or local governments on property they own. This category does not apply to pesticide applications made to control vertebrate pests. 

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Category 108: Aquatic Pest Control (2011)

For individuals preparing to be licensed in the application of pesticides to standing or running water when made to control aquatic weeds, amphibians, fish and other pests in water, except for pesticide applications which are included in the Public Health Category 110. 

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Category 109: Industrial and Right-of-Way Weed Control (2006)

For individuals preparing to be licensed in the application of pesticides to maintain roads, sidewalks, trails, paths, utility lines, railways, parking lots, drilling rigs, substations, open irrigation and drainage structures or similar areas and adjacent land within right of ways associated with such areas for the purpose of establishing or maintaining definable cover or bare ground. 

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Category 110: Public Health Pest Control (2006)

For individuals preparing to be licensed in the application of pesticides for the control of pests having medical or public health importance, except invertebrates. This category applies to non-government commercial applicators who use pesticides for the management and control of pests having public health importance. 

This guide is for obtaining licensure in both Category 110 and 110 G. 

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Category 110G: Government-Sponsored Public Health Pest Control

For individuals preparing to be licensed in the application of restricted use pesticides in government-sponsored public health programs for the control of pests having medical or public health importance. 

This guide is for obtaining licensure in both Category 110 and 110 G. 

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Category 111: Research & Demonstration (2017)

For individuals preparing to be licensed in the application of pesticides in the course of conducting field research or demonstration. No license or certification will be issued in this category unless the applicant also obtains licensing or certification, in the specific category listed in these Rules, which is appropriate to the research activity. 

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Category 113: Metam Sodium for Sewer Root Control (2001)

For individuals preparing to be licensed in the application of metam sodium in sewers to control roots. For purposes of this sub-category, “sewer” shall mean any artificial conduit for the transmission of wastewater to a wastewater treatment plant. 

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Category 114: Aerial Pest Control

For individuals preparing to be licensed in the application of pesticides by unmanned aerial vehicle (UAV), fixed, or rotary wing aircraft. 

  • For Qualified Supervisors and Certified Operators: This category must be held in addition to the Pest Management Category for the aerial application being made. 
  • For Private Applicators: This category must be held in addition to the Private Applicator License if making aerial applications. 

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Category 206: Turf Pest Control (2015)

For individuals preparing to be licensed in the application of pesticides to: (1) managed turf to control invertebrate pests, including insects, mites, slugs, snails, and nematodes, or to control plant diseases or weeds; (2) ornamental beds to control weeds; (3) xeriscaped or similar areas covered in mulch or other media to control weeds; or (4) sidewalks, driveways, paved areas other than parking lots or bare ground located on private or public property and that are not located in the zoned right-of-way to control weeds. Managed turf or ornamental beds located in a zoned right-of-way may be treated under this Category 206 or Category 109, as defined under Part 8.01(i). 

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Category 207: Ornamental Pest Control (2006)

For individuals preparing to be licensed in the application of pesticides to ornamental trees, shrubs, beds, flowers and other ornamental plants, except turf or indoor ornamental plants, to control invertebrate pests, including insects, mites, slugs, snails and nematodes, or to control plant diseases. 

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Category 301: Wood Destroying Organism Pest Control (2015)

For individuals preparing to be licensed in the application of pesticides to control termites, carpenter ants, powder post beetles, fungi, and/or other wood destroying organisms in structures and/or adjacent outside areas.  

This category does not qualify you to perform any type of fumigation. If you are looking to qualify for structural fumigation – such as fumigation in railcars, storage containers, grain storage silos, or other enclosures – you must obtain Category 303. If you are looking to qualify for soil fumigation, you must obtain Category 309A. For burrowing rodent fumigation, you must obtain Category 309B. 

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Category 302: Outdoor Vertebrate Pest Control (2008)

302 Outdoor Vertebrate Pest Control

For individuals preparing to be licensed in the application of pesticides intended for preventing, destroying, repelling or mitigating any reptile, bird, feral dogs and cats, moles, voles, bats, wild carnivores, rabbits, skunks, amphibian pests not in water and any other vertebrate pest, except rats and mice. 

This category does not qualify you to perform any type of fumigation. If you are looking to qualify for structural fumigation – such as fumigation in railcars, storage containers, grain storage silos, or other enclosures – you must obtain Category 303. If you are looking to qualify for soil fumigation, you must obtain Category 309A. For burrowing rodent fumigation, you must obtain Category 309B. 

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Category 303: Structural Fumigation Bundle

For individuals preparing to be licensed in the application of a fumigant to one or more rooms in a structure or to the entire structure at a desired concentration and for a length of time necessary for the control of rodents and/or insect pests, including the application of a fumigant to a localized space or harborage within a structure, including but not limited to railcars, storage containers, grain storage silos or other enclosures, including tarpaulin fumigations, for insect and/or rodent control. This category is required for the use of a fumigant in any licensure category authorized by Title 35, Article 10, when the application of the fumigant is made to or in a structure as defined in Part 1.02(m). 

  • For Private Applicators: This category must be held in addition to the Private Applicator License if making Structural Fumigation applications.

The exam will NOT cover chapters 7.3 and 7.7 in the Non-Soil Fumigation guide as they are covered by other categories. 

Information contained in both the Structural Fumigation and the Non-Soil Fumigation is needed to obtain this category. This category does not qualify you for soil or burrow fumigation (see Category 309A and Category 309B) or sewer root control (see Category 113). 

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Category 304: Residential/Commercial Pest Control (2006)

304 Residential or Commercial Pest Control For individuals preparing to be licensed in the application of pesticides or bait stations intended for use for preventing, destroying, repelling or mitigating structural pests, including without limitation insects and rodents. However, this category does not include the application of fumigants or actions taken to control wood destroying organisms, outdoor vertebrates, or grain storage pests. 

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Category 305: Stored Commodities Treatment (2025)

305 Stored Commodities Treatment

For individuals preparing to be licensed in the application of pesticides for the treatment of pests in raw grain stored in facilities which are not used for animal or human habitation; the application of plant growth regulators to agricultural commodities stored in facilities which are not used for animal or human habitation; and the application of pesticides to commodity processing equipment or commodity storage facilities (not including offices or other structures). This category does not cover applications made to control pests in potato storage facilities covered by Category 308. 

This category no longer qualifies you to perform any type of fumigation. If you are looking to qualify for structural fumigation – such as fumigation of railcars, storage containers, grain storage silos, or other enclosures – you must obtain Category 303. If you are looking to qualify for soil fumigation, you must obtain Category 309A. For burrowing rodent fumigation, you must obtain Category 309B. 

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Category 306: Wood Preservation/Wood Treatment (2021)

306 Wood Treatment For individuals preparing to be licensed in the application of pesticides to prevent, destroy, repel or mitigate pests in wood or wood products which are, or are capable of being, incorporated into a structure, not including downed timber prior to bark removal or sawing. 

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Category 307: Interior Plantscape Pest Control (2006)

For individuals preparing to be licensed in the application of pesticides to house plants and other indoor ornamental plants kept or located within structures occupied by humans, including, but not limited to houses, apartments, offices, shopping malls, other places of business and other dwelling places, to control invertebrate pests that adversely affect such plants, including insects, mites, slugs, snails and nematodes; and to control plant diseases. 

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Category 308: Post Harvest Potato Pest Control (2015)

For individuals preparing to be licensed in the application of pesticides for the treatment of pests in raw potatoes stored in facilities which are not used for animal or human habitation; the application of plant growth regulators to potatoes stored in facilities which are not used for animal or human habitation; and the application of pesticides to potato processing equipment or potato storage facilities (not including offices or other structures). 

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Category 309A: Soil Fumigation Pest Control

For individuals preparing to be licensed in the use of a fumigant to control pests in soil. 

  • For Qualified Supervisors and Certified Operators: This category must be held in addition to the Agricultural Pest Management Category for the fumigation application being made.   
  • For Private Applicators: This category must be held in addition to the Private Applicator License if making Soil Fumigation applications.

This category does not allow application of fumigants to control pests in structures as described in Category 303: Structural Fumigation Pest Control, or to control pests in non-soil sites, such as burrowing, rodent control, described in Category 309B: Non-Soil Fumigation Pest Control. 

Download a free PDF of the Soil Fumigation Manual, OR

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Category 309B: Non-Soil Fumigation Pest Control

For individuals preparing to be licensed in the use of a fumigant to control pests in non-soil sites, such as burrowing rodent control, not otherwise addressed in Category 303, Structural Fumigation Pest Control.   

  • For Qualified Supervisors and Certified Operators: This category must be held in addition to the Structural Pest Management category for the fumigation application being made. 
  • For Private Applicators: This category must be held in addition to the Private Applicator License if making Non-Soil Fumigation applications.

The exam will ONLY cover content from Chapters 1-6 and 7.3. 

This category does not allow application of fumigants to control pests in structures as described in Category 303: Structural Fumigation Pest Control, or to control pests in soil as described in Category 309A: Soil Fumigation Pest Control. 

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Category 401: Private Applicator

For individuals preparing to be licensed in order to use or supervise the use of a restricted-use pesticide for the purpose of producing an agricultural commodity on property owned or leased by the applicator or the applicator’s employer or, if the pesticide is applied without compensation other than trading of personal services between producers of agricultural commodities, on the property of another person must be a licensed private applicator.  

To purchase a hard copy of this guide please go to the CDA Private Applicator Testing Information Page.  

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