Dominant species distributed along the shore of the Inland Sea of Japan are
Lyngbya aestuarii Liebm. and
Rhizoclonium arenosum (Carm.) Kütz., and these brackish algae become the object of weeding. Under the peculior environmental conditions on the salt-field, salinity, temperature and quantity of the sea water are the main factors controlling the growth of the algae. Especially, low salinity and organic matters contained in the sea water promote the growth of
Rhizoclonium and
Lyngbya respectively. Among the various herbicides, CuSO
4, CuCI
2·Cu(OH)
2·H
2O, CuCO
3·Cu(OH)
2, Cu(OH)
2, 2, 4-D, PCP, NaClO solution, NaClO
2 and NaClO
2 are specially used for the algicides, and their critical density to algae and time of their treatment are examined within the range of 0.1-1,000 p.p.m. Sodium hypochlorite solution (NaCIO) is the most suitable algicides for the salt-field on account of its strong algicidal power and being non-poisonous to human bodies
抄録全体を表示