There is also a lack of quantitative information about the influence of willows on the overall ecology of streams, particularly large streams. Any policy relating to willows along waterways will be successful only if there is more widespread recognition of problems caused by willows. Therefore a program of raising awareness about problems caused by willows and alternatives to willow planting is recommended. The program should be targeted at Catchment Management Authorities, Landcare groups, landholders, 'Friends' groups, conservation volunteer organisations, Field Naturalists and Fisher organisations. It is recommended that the Department of Natural Resources and Environment facilitate a reduction in willow planting.
Specific recommendations are as follows.
Review structural design guidelines and construction practice and modify as necessary so that structural erosion control works do not need to include willow planting to ensure their success. Update published guidelines to discourage willow use and to provide information on indigenous revegetation techniques. Encourage development and adoption of indigenous revegetation and rehabilitation strategies by Catchment Management Authorities. Strategies should include guidelines for the use of indigenous plants for erosion control. Encourage Catchment Management Authorities to adopt policies of no willow planting.