- Apr 05, 2017 -
Early fungicide is an inorganic compound, such as sulphur and copper formulations (see Bordeaux) which is still in use. 1914 German I. Reem by using organic mercury compounds to control wheat smut, marked the beginning of development of organic fungicides. In 1934 American W.H. Teasdale found dimethyl dithio carbamate bactericidal properties, organic fungicide began to develop rapidly thereafter. In the development of 40-50 has three main series of organic sulfur fungicides: fukumi classes, forest class (such as Zineb) and three chlorine methyl thio-n-dimethyl class, in addition to organic chlorine, organic mercury fungicides, organic arsenic but also development. These fungicides are mostly protective agents, applications have limitations. Since the 60 's, more types of chemical fungicides are emerging, one of the most important developments are systemic fungicides available.