Using copper preparation fungicides to prevent diseases more easily
Copper preparations play an important role in fungicides , and it is still an "old qualification". For example, copper sulfate has been used for more than 200 years, and Bordeaux liquid has been used for more than 100 years. In modern times, through high-tech means, its processing technology and additives are more advanced, some are optimized by purification, and some are complexed or compounded to make the content of hydrated copper ions (effective copper ions) higher and more active. The dispersibility, safety, miscibility, adhesion and permeability of the liquid are better, and the effect of controlling the disease has been greatly improved, which is unmatched by the original copper preparation. The in vitro culture of cells and tissues has become an indispensable part of life research and practice. A wide variety of cell types are cultured, from viruses to bacteria and fungi, from human cells to animal and plant cells. Some cells and tissues can be grown in suspension, but a considerable number of mammalian cells require surface attachment. Therefore, in addition to good transparency, non-toxicity and sterility, the culture flasks, Culture Plates and culture dishes used to provide the in vitro culture environment of cells also need to be surface-modified to enable them to adhere, divide and grow. 75 cm cell culture flask,t75 cell culture flask,suspension cell culture flask Yong Yue Medical Technology(Kunshan) Co.,Ltd , https://www.yongyuepcr.com
Look at the advantages and disadvantages of a copper preparation, can not be distinguished from the copper content, such as the strong activity of divalent copper ions, easy to bind to the protein of the bacteria, causing its protease to denature and die, while monovalent copper ions are difficult to bind to the protein of the bacteria , can not achieve the role of sterilization, it will not achieve the purpose of prevention and treatment. Therefore, the higher the content of divalent copper ions (effective copper), the stronger the bactericidal effect, and conversely, the higher the effective copper content is not helpful. Inorganic copper or organic copper acts in the form of ions. If the particle size of copper is too large to enter the cell tissue, it is impossible to prevent disease and cure. Therefore, its processing technology is crucial when it reaches a nanometer level. At the processing level, the dispersibility and permeability of such a copper preparation are necessarily good. The copper preparation can be used by adding water, has good affinity with water, and has a fast dissolution rate, and is also an important index for measuring the quality of the copper preparation.
In general, copper preparation is a preventive fungicide, which relies on copper ions to be evenly distributed on the leaves to form a film to block and inhibit the entry and germination of the pathogen. The best time for drug use is before and during the onset of the crop. . Because it is a protective agent, it has not been resistant for 200 years.
It is a misunderstanding that copper preparations are effective against bacterial diseases and that it is useless to control fungal diseases. In fact, most copper preparations can cure both diseases. For example, copper noble (basic copper sulphate) can not only prevent bacterial soft rot, ulcers, scabs, keratosis and leaf blight, but also prevent downy mildew, late blight, anthracnose, gray mold, etc. of various vegetables. . Note that basic copper sulphate is not equal to alkaline. It is a ternary copper. It is a chemical group, not an active ingredient containing a base. It is a neutral agent. At present, vegetable farmers believe that the better copper preparations are copper noble, copper hydroxide, Chunwang copper, DT, quinoline copper, copper sulphate, thiabium copper, copper master (copper oxide), copper rosinate.
Can copper preparations be mixed with other fungicides? What is the effect after mixing? First, copper formulations can be mixed with most pesticides, and the argument that they cannot be mixed with most fungicides is overkill. Of course, due to the difference in properties between copper preparations, the contraindications for their compatibility are also different. For example, copper nobles and stone sulphur mixture, thiram and other alkaline agents, antibiotics, foliar fertilizers, and emulsifiable insecticides cannot be mixed. And it is mixed with Amishida, and the role of preventing various diseases is outstanding. Mixed with Jinlei, anti-virus cockroaches, Anke, Yikuai, Kejia, Yinfali, etc., the advantage of controlling the downy mildew of cucumber and tomato late blight is quite obvious. The principle lies in that two kinds of chemical structures and drugs with completely different properties are mixed, and the same pathogen is not resistant to them, so it has the effects of synergistic effect, double effect and delay effect.