PK of Triazole Fungicides: Which is Better, Difenoconazole, Tebuconazole, Propiconazole, Epoxiconazole or Flusilazole?
Conclusion:
Prevents and controls: Difenoconazole > Tebuconazole > Propiconazole > Flusilazole > Epoxiconazole |
Systemic: Flusilazole ≥ Propiconazole > Epoxiconazole ≥ Tebuconazole > Difenoconazole |
Safety: Difenoconazole > Tebuconazole > Flusilazole ≥ Propiconazole ≥ Epoxiconazole |
Fast acting: Flusilazole > Propiconazole > Epoxiconazole > Tebuconazole ≥ Difenoconazole |
Inhibition of plant growth: Epoxiconazole > Flusilazole > Propiconazole > Tebuconazole > Difenoconazole |
Comparison of Prevents and Controls
Difenoconazole: Broad-spectrum fungicide with preventive and curative action, for control of scab, anthracnose, white rot, powdery mildew, brown spot, Alternaria leaf spot, rust, gibberellic disease, etc. in cereals, rice, soya beans, potatoes, sugar beet, oilseed rape, grapes, pome fruit, stone fruit, bananas, ornamentals and various vegetable crops.
Tebuconazole: Broad-spectrum fungicide with protective, curative and eradicative action, for control of powdery mildew, rust, scab, damping off, root rot, leaf mold and various spot diseases, etc. in wheat, rice, maize, sorghum, peanut, vegetables, banana, apple, pear, etc. Especially for the leaf spots of solanaceous vegetables.
Propiconazole: Broad-spectrum fungicide with protective and curative action, for control of leaf spot, anthracnose, powdery mildew, leaf mold, etc. in wheat, barley, rice, maize, vegetables, banana, grape, watermelon, litchi, etc.
Epoxiconazole: Broad-spectrum fungicide with preventive and curative action, for control of leaf spot, powdery mildew, rust, anthracnose, white rot, etc. in cereals, rice, coffee, peanut, sugar beet, celery, kidney bean, melons, bananas, grape, etc.
Flusilazole: Broad-spectrum fungicide with preventive and curative action, for control of powdery mildew, scab, leaf spot, rust etc. in cereals, maize, oilseed rape, sugar beet, pear, apple, peach, grape, banana, sunflowers, etc.
Prevents and controls:
Difenoconazole > Tebuconazole > Propiconazole > Flusilazole > Epoxiconazole
Comparison of Systemic:
Difenoconazole: Systemic fungicide. Absorbed by the leaves, with acropetal and strong translaminar translocation.
Tebuconazole: Systemic fungicide. Rapidly absorbed into the vegetative parts of the plant, with translocation principally acropetally.
Propiconazole: Systemic foliar fungicide, with translocation acropetally in the xylem.
Epoxiconazole: It has strong systemic, can be quickly absorbed by the plants and conduction to the infected area, make the disease infect to immediately stop, prevention and control of local administer thoroughly.
Flusilazole: Systemic fungicide, absorbed through the stem and leaves, moving in the xylem. It can be moved from the spray site to other parts and distributed again.
Systemic:
Flusilazole ≥ Propiconazole > Epoxiconazole ≥ Tebuconazole > Difenoconazole
Comparison of Safety:
Difenoconazole: In wheat, early foliar applications at growth stages 29–42 might cause, in certain circumstances, chlorotic spotting of leaves, but this has no effect on yield.
Tebuconazole: Good plant compatibility in most crops with any formulation, and achieved in more sensitive crops by appropriate formulations, e.g. WP, WG or SC.
Propiconazole: Unstable at high temperatures. Some dicotyledon crops and certain varieties of grapes and apples can cause phytotoxicity. The common phytotoxicity symptoms during foliar spraying are hardening of young tissues, brittle, easy to break, thickening of leaves, darkening of leaves, slow plant growth (generally will not cause growth stop), dwarf, tissue necrosis, chlorosis, perforation, etc. Seed treatment will delay the germination of cotyledon.
Epoxiconazole: Pay attention to the amount and climate, otherwise it will be easy to cause phytotoxicity. It may cause phytotoxicity to melon vegetables. In tomato will lead to the top of the tomato bud flowers and young fruit water loss.
Flusilazole: Flusilazole has a long-lasting period and it is prone to cumulative toxicity. The recommended interval period is more than 10 days.
Safety:
Difenoconazole > Tebuconazole > Flusilazole ≥ Propiconazole ≥ Epoxiconazole
Comparison of Fast Acting:
Triazole fungicides have strong translocation, so the absorption effect is relatively fast.
Fast acting:
Flusilazole > Propiconazole > Epoxiconazole > Tebuconazole ≥ Difenoconazole
Comparison of Inhibition of Plant Growth:
Triazole fungicides can inhibit the synthesis of gibberellin in plants, resulting in slow apical growth and shortened internodes.
Inhibition of plant growth:
Epoxiconazole > Flusilazole > Propiconazole > Tebuconazole > Difenoconazole
Comparison of Control Efficacy against Certain Disease:
Control efficacy against anthracnose: Difenoconazole > Propiconazole > Flusilazole > Epoxiconazole
Control efficacy against leaf spot: Epoxiconazole > Propiconazole > Difenoconazole > Tebuconazole
Control efficacy against scab: Flusilazole > Difenoconazole > Epoxiconazole > Tebuconazole > Propiconazole
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