Teachers, what is the difference between pyraclostrobin and kresoxim-methyl? What's the impact?

Pyraclostrobin, azoxystrobin and kresoxim-methyl are all methoxyacrylates. Methoxyacrylate bactericide is a new type of bactericide developed with natural methoxyacrylate antibiotics as the lead compound. So far, six varieties have been commercialized, and at least seven compounds are under development. Their chemical structures all contain methoxy acrylate groups or are derived from methoxy acrylate. There are many similarities in agricultural application.

(1) unique mechanism of action. They are all mitochondrial respiratory inhibitors of pathogenic fungi, that is, through cytochrome B and C, intermolecular electron transfer inhibits mitochondrial respiration, interferes with cell energy supply, and leads to cell death, thus playing a bactericidal role. There are many fungicides that act on mitochondrial respiration, but the site of action (cytochrome b) of phenoxy acrylate fungicides is different from all previous fungicides, so it is effective against strains that have developed resistance to sterol inhibitors (such as triazoles), benzamides, dicarboxylamides and benzimidazoles.

(2) broad-spectrum sterilization. It shows good activity against almost all fungal diseases (ascomycetes, basidiomycetes, oomycetes and fungi), such as wheat powdery mildew, leaf blight, red spot, reticular leaf spot, smut, rice blast, sheath blight, downy mildew and Fusarium wilt. This is more important for the prevention and control of epidemics.

(3) It has protective and therapeutic effects, has good osmotic and systemic effects, and can be used for spraying on stems and leaves, spraying drugs on water surface, treating seeds, etc.

(4) high selectivity, safety to crops, people and animals and beneficial organisms, and basically no pollution to the environment.

(5) These compounds have inhibitory effects not only on pathogenic bacteria, but also on electron transfer in some insects and plants. Therefore, it is possible to develop pesticides and herbicides from phenoxy acrylate, and there are patents in this field.

At present, the common ones on the market are:

Pyraclostrobin's product name is Kairun and kresoxim-methyl's product name is Tribe, both of which belong to BASF.

The trade name of azoxystrobin is Amisi Da, and the other one is azoxystrobin+difenoconazole, and the trade name is AmiMiao Shou, both of which are Syngenta.

The product name of dimethoxystrobin is methyl jasmonate, and the product name of dimethoxystrobin tebuconazole is lovely, which belongs to shenyang institute of chemical technology, China.

After several years of extensive use around the world, it shows that this bactericide is not only an excellent disease control product, but also can significantly improve fruit quality and increase yield.