The Return of the Non-Native
Water Caltrop (Trapa bicornis),a.k.a. Water chestnut, Buffalo nut, Bat nut, Devil pod, Ling nut, Singhara, or Pani-phal, has claimed the biggest prize in our watershed, Lake Accotink itself.
November 6, 2022:
The largest concentrations of Water Caltrop were back among the islands of the lake in areas too shallow to access by watercraft. Working in such places involves arduous toil in quagmires of astoundingly deep and sticky mud. Disposal is by dragging the heavy tubs to the highest driest accessible point nearby and leaving the water caltrop in piles to compost.
Water caltrop forms thick floating mats that can expand exponentially, shading out native submerged aquatic vegetation, causing declines in dissolved oxygen, and interfering with boating.
Volunteers toil in the Lake Accotink mud to remove Water Caltrop
The pretty poison of Water Caltrop in Lake Accotink