(1) “Biological control” means using living organisms that suppress the host plant. Insects, diseases, and foraging animals are examples of biological controls.

(2) “Chemical control” means using conventional or natural herbicides to eliminate noxious weeds or additional invasive, nonnative plant species that present a special concern within a specified area. It does not mean treatments for general vegetation management.

(3) “Cultural control” means enhancing the vigor of desirable plants which may crowd out or prevent weed infestations. Hydroseeding or planting low-growing, self-maintaining shrubs are examples of cultural practices.

(4) “Feasible” means a control method or combination thereof that is capable of being carried out or achieving a goal. This includes consideration of such factors as plant biology, site characteristics, scope of the problem, and available resources.

(5) “Integrated weed management (IWM)” means a coordinated decision making process that uses the most appropriate weed management methods and strategies, along with a monitoring and evaluation system, to achieve weed management goals and objectives in an environmentally and economically sound manner. It allows for the use of mechanical, biological, cultural, chemical, and prevention control methods.

(6) “Invasive plant” means an introduced, nonnative plant that is aggressive and causes economic loss and adverse effects to agricultural, natural and human resources.

(7) “Invasive plant of special concern” means an invasive plant identified as a threat by the U.S. Department of Agriculture, the Washington Departments of Agriculture and Ecology, or the Washington Invasive Species Council.

(8) “Mechanical, manual control” means cutting or cultivating in a manner to reduce or slow undesirable plant growth (i.e., using hand labor, mowers, graders, and ditching equipment).

(9) “Planning and prevention” means creating design standards that enhance or complement other control methods (such as slope grade within mower reach) and policies or standard operating procedures such as equipment cleaning or weed free material standards that prevent contamination or spread of noxious or nonnative invasive species.

(10) “Weeds” means both noxious weeds which are so designated under State law and additional nonnative invasive plants of special concern that have been added to a County specific list of plants targeted for control and elimination.

(11) “Work Plan” means a plan prepared annually by the Clallam County Road Department or any other County department with land management responsibilities, and approved by Clallam County Noxious Weed Control Board prior to the commencement of seasonal weed management.