Aqueous plant treatment agent, useful for preventing and controlling fire blight or Erwinia amylovora, comprises water, calcium, formate and nanoscale silver

摘要

Aqueous plant treatment agent comprises water, calcium, formate and nanoscale silver. Independent claims are also included for: (1) a formulation comprising (in wt.%) calcium calculated in calcium oxide (5-40), an inorganic formate calculated in formic acid (5-70) and the nanoscale silver (0.001-0.2); and (2) a concentrate obtained by mixing (in parts by wt.) the formulation (1) with water (0.2-20). ACTIVITY : Antibacterial. The antibacterial activity of the agent was tested against Erwinia amylovora385 in flowers of apple trees by spraying a suspension with a bacterial count of 8x 10 6cell/ml on the flowers. The result after the incubation of 6 days showed that the agent exhibited a reduction of infestation of a maximum of 95.2%, which was close to a reduction of infestation of a maximum of 100% exhibited by a solution of an antibiotic streptomycin (0.06 wt.%) in tap water. MECHANISM OF ACTION : None given.