University of Delaware
delware environmental institute

DNREC: Six downstate ponds to be treated for aquatic nuisance weed

During the next three weeks, weather permitting, DNREC’s Division of Fish and Wildlife will be treating six downstate ponds for aquatic nuisance weeds that, left unchecked, can choke the waters, crowd out beneficial plant species, and prevent fishing and boating access. The ponds to be treated are: Abbotts Pond and Tub Mill Pond near Milford; Millsboro Pond; Horseys Pond and Tussock Pond near Laurel; and Concord Pond near Seaford.

In most of the ponds, the primary target aquatic species is hydrilla, a non-native plant that likely entered the state through the aquarium trade. The Division’s Fisheries Section will apply Sonar, an EPA-registered and approved aquatic herbicide containing fluridone. In compliance with new guidelines issued by the EPA, Fisheries has filed a notice of intent to use Sonar and has submitted a pesticide discharge management plan.

Sonar has been used in Delaware since the 1980s and proven safe and effective for controlling hydrilla. Sonar does not pose any threat to wildlife, including fish. “There are no restrictions on fishing or consumption of fish as a result of these planned treatments,” said Fisheries Administrator John Clark.