The type of control or ways of managing aquatic weeds can be conveniently grouped as mechanical, habitat manipulation, biological, chemical or integrated control.
Regardless of the weed control option chosen, it is important to monitor the results of control actions. Monitoring answers the key question of whether the desired outcomes are being achieved.
The first line of defense in the fight against aquatic weed invasions is public awareness and the ability to tackle weeds before they get out of hand – at the first sign of a new plant, rather than a total infestation.
NIWA diver Aleki Taumopeau with invasive weeds in Lake Rotorangi. Credit: Rohan Wells