Del. Code tit. 3 § 2403
The state Department of Agriculture may enter into an agreement with any designated county in this State for the purpose of control and eradication of designated noxious weed within that county. When such an agreement is executed and certified in writing to the Secretary of State, the Department and the county may conduct surveys to determine the location and amount of infestations of designated noxious weed within that county, and may provide technical and financial assistance to landowners in a cooperative control or eradication program, and may effect a program of mowing, spraying, or other control or eradication practices on road rights-of-way, drainage ditch banks, parks, playgrounds, and other public or private lands. The agreement between the Department and county may be terminated by either party on 30 days written notice.
3 Del. C. § 2403