Pyrimidine fungicides are an important type of pyrimidine ring-containing fungicides developed in the early 90s of the 20th century, and the earliest variety is pyrimidin-ring-containing diazinephos developed by Ciba-Geigy in Switzerland in 1952, and a variety of subsequently developed on this basis. The drug has a special effect on various diseases caused by Botrytis cinerea. Its mechanism of action is unique, inhibiting the biosynthesis of methionine and the secretion of cell wall degrading enzymes, thereby affecting the invasion of pathogenic bacteria into host plants. At present, the main varieties are azimethamine, pyrimehydrazone, pyrimychlor, pyrimecyclic amine, fluoropyrimidine, chlorbenzyrimidinol and flubenzyrimidinol.
Azoxycyclic amine
Other Names:
Cipropyramide, chorus, UNIX
Chemical Name:
4-Cyclopropyl-6-methyl-N-phenylpyrimidine-2-amine
It is a highly effective systemic fungicide, which has both long-term and protective effects, inhibits the biosynthesis of methionine and hydrolase activity in pathogenic bacterial cells, interferes with the fungal life cycle, inhibits pathogenic bacterial penetration, and destroys the growth of mycelium in plants. It has excellent control effect on gray mold and spotted defoliation caused by semi-known bacteria and ascomycetes. It is not safe for cucumbers and is prone to pesticide damage. In the case of high temperature, it is also harmful to greenhouse tomatoes, so it should be used with caution.
Azimamide
Product Name:
Xercar, methylpyrimidamine, pingao,
mythos、scala
Chemical Name:
N-(4,6-dimethylpyrimidin-2-yl)aniline.
It has a special effect on gray mold. Its bactericidal mechanism is unique, inhibiting the secretion of fungal hydrolase and the biosynthesis of methionine, thereby preventing the infection of pathogens and killing germs. It has the effect of protection and **, and has the effect of systemic and fumigation, and quickly reaches the flower, young fruit and other parts of the plant that cannot be reached by spraying after application to kill the pathogens, and the drug effect is faster and more stable on the eggplant to produce pesticide damage, and there will be a lot of black-brown lesions on the leaves of crops, and the shape of these lesions is irregular or the leaves of the crops are yellowed and fallen. When producing pesticide spots, it is also believed that eggplant is a "spotted defoliation disease" on legumes, and the pesticide damage on legumes and vegetables is usually said to be yellow-white crop leaves, and the more serious pesticide damage will lead to dryness and fall off, and the same flowers and fruits will also cause falling.
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