Aquacide Blog — Brazilian Elodea

Brazilian Elodea (egeria densa) was introduced to this country about 100 years ago.  It was an attractive oxygen producing plant primarily sold as an aquarium plant.  It can now be found in 40 States including Hawaii. It is an aggressive lake weed, very similar to both American Elodea and Hydrilla.  All three are submersed and rooted to the lake bottom.  Leaves of Brazilian Elodea have minute teeth not visible by the naked eye.   It spreads primarily by floating fragments that simply re-root.  It does not use seeds or tubers.  Stems are long and slender and rarely branch.  Each leaf is...