Copper preparations rely on release of copper ions an […]
Copper preparations rely on release of copper ions and the -SH, -NH2, -COOH, -OH groups in the protein of the fungus to cause the bacteria to die. Copper preparations are divided into two categories, inorganic copper and organic copper. At present, inorganic copper is still the main type. Popular inorganic copper preparations on the market include copper sulfate, basic copper sulfate, copper acetate, copper oxychloride, and copper hydroxide. However, inorganic copper preparations have several shortcomings: ① generally cannot be mixed with other acidic pesticides, and the most inorganic copper preparations are strongly alkaline; ② the use of inorganic copper preparations can easily cause maggots such as mites and scale insects; ③ during flowering It is easy to produce phytotoxicity when it is used in the young fruit stage. Due to the above deficiencies, inorganic copper preparations have been limited, and the advantages of organic copper in applications have made the development of organic copper preparations more and more concerned in the copper preparation and fungicide market.
Organic copper fungicides have more advantages than inorganic copper preparations of application: ① Organic copper preparations are more safe and reliable, and crops are less prone to phytotoxicity; ② Organic copper preparations do not easily cause red spiders and Occurrence of rust ticks; ③ Most of the organic copper preparations are neutral, have good affinity, have better mixing properties, and can be used with most fungicides, acaricides, insecticides, and plant growth regulators. Mixing; ④ The organic copper preparation has a wider range of application and use period, and can be mixed with other fungicides in each growth period; ⑤ Organic copper preparations generally have a lower copper content, lower residual amounts, and reduced environmental pollution; ⑥ In some organic copper preparations, copper ions, and compounds work synergistically, and the dual mechanism of sterilization is more thorough and efficient.