Technological evolution in the field of fungicides and pesticides
As early as 1938, GB484115A proposed the combination of copper oxide and zeolite to prepare a dry powder fungicide. Then in 1958, GB788668A proposed a technical solution for the antibacterial of streptomycin and copper oxide. In 2004, with the development of nanomaterials, US20040067159A1 proposed a technical scheme for combining copper nanoparticles with other biocides to improve the adhesion of the active ingredients on the surface of the plants and improve the control effect. In the same year, CN1552456A also proposed the use of Cu2+ as an antibacterial catalyst. Subsequently, there have been technical solutions for compounding antibacterials of copper oxide, cuprous oxide and various compounds, such as terpene derivatives, mineral salts (US6849276B1), copper radical compounds (KR100752528B1), microbial spores (US20110033436A1) and the like. In 2011, CN101933525A proposed a technical solution for preparing a photocatalytic fungicide by compounding nano-copper oxide-copper oxide. In 2015, CN104542707A proposed a technical solution for synergistic sterilization and photocatalytic degradation of nano-copper oxide and pesticide thiram.
Technological evolution in the field of pesticides
Copper oxide is an inorganic copper insecticide well known in the art. In 1949, GB620600A used copper oxide as a sensitizer for insecticidal fumigation compositions. In 1951, FR970319A proposed the combination of copper oxides and a substance that produces ammonia to effectively control plant pests. In 1990, CN1041354A proposed the use of copper salts, insecticides, nutrients and plant growth regulators to provide a multi-effect disease control agent. In 2007, KR100752528B1 proposed a technical solution for the preparation of insecticides by combining copper free radical compounds with copper oxide/potassium hydroxide. Subsequently, there have been technical solutions for combining microbial spores with copper salts to slow down drug resistance and improve control.