Vegetation e.g. algae preventing and killing device for use in thatched roof, has spear units with barbed hook inserted in reed bundles to generate vegetation preventing and killing metal ions by reaction with precipitation or rain water

摘要

The device has spear units (26) with barbed hook inserted in reed bundles that are provided on a thatched roof. The spear units generate vegetation preventing and killing metal ions with a reaction with precipitation or rain water. A metal unit generating metal ions is provided at end sections of the respective spear units, where the metal unit is designed as a metal bristled brush head or as metal bristled fan head.