Introduction of ten triazole fungicides

1, triazole fungicides are for fungal diseases, diseases caused by bacteria, viruses and other pathogens are ineffective. Before infecting host tissues, plant pathogenic fungi germinate from sexual spores or mycelia into asexual spores, which produce bud tubes or haustoria, and then invade plant tissues. When an asexual spore is produced, both the cell membrane and the cell wall are naturally synthesized.

2. The best time to use triazole fungicides is the early stage of infection, when the bacteria begin to absorb organic nutrients in the host while developing and forming new asexual spores. Therefore, triazole fungicides are therapeutic fungicides.

3. In production, triazole is best mixed with fungicides of other bactericidal mechanisms, and the effect will be better. For example, with pyrazole ether ester, copper preparation, mancozeb and other protective fungicides, first eliminate most of the bacteria spores before germination, and then clean up the residual has invaded the plant body;

4, different triazole fungicide species control spectrum is not the same, sometimes two kinds of triazole fungicide can be mixed together, play a better bactericidal effect. For example, propiconazole and fenoconocyclozole, propiconazole and pentazole alcohol, imidazole and apromazole, etc. The development of triazole fungicides went through three stages. After scientists successively studied the ergosterol synthesis mechanism of main plant pathogenic fungi, different varieties of triazole fungicides were synthesized. So far, triazole fungicides have more than 40 varieties.

5. Triazole fungicides are ineffective against diseases caused by low fungal infection such as downy mildew and blight. When low fungi form cell membranes, they lack the ability to synthesize ergosterol, and can only use organic matter obtained from other ways to metabolize into ergosterol.

6, triazole fungicides will not inhibit plant cell membrane synthesis, relatively safe for plants. Plant cell membranes do not contain ergosterol, but do contain another similar substance, cycloatenol.

7, triazole fungicides should not be used in the early growth of plants, such as grasses before tillering or broadleaf plant flower bud differentiation. Grasses are more tolerant to triazole fungicides than broad-leaved plants. Triazole can inhibit the synthesis of gibberellin in plants, resulting in slow growth of plant apex and shortened internode.

8. The growth inhibition level of different triazole fungicides on plants is different. As a general rule, fluocyclozole > fluosilazole > propiconazole > enazolol > triazolone > pentazolol > phenoxycyclozole > Nitrilbuzole;

9. It is necessary to know the safe dose of each triazole fungicide used on a plant to kill and prevent disease. The dosage of triazole fungicides to inhibit plant growth and the appropriate dose of bactericide are different. As long as a good grasp of the relationship between the two, you can maximize the use of triazole fungicides;

10. Most triazole fungicides can be moved from leaf to leaf, or from bottom to top along a tube. The experiment proved that only three drops of triazole fungicide on the soybean compound leaves can cover the whole leaf in one day.

Therefore, when spraying triazole fungicide, the sprinkler head should be lower, which can reduce the risk of inhibiting the growth of the top of the plant, but also can use the characteristics of transmission to the top, to ensure the prevention and control effect of spreading diseases such as anthrax, brown spot disease, black star disease from the bottom up.