FUNGICIDAL ACTIVE COMPOUND COMBINATIONS

Abstract

Safeners for herbicides are suitable for increasing the microbicidal activity of fungicides.

Claims

1. A method of increasing the microbiocidal activity of a fungicide comprising treating a seed or a plant with the fungicide and a safener, wherein the safener is mefenpyr-diethyl and wherein the fungicide is fluoxastrobin, trifloxystrobin, or spiroxamine, wherein the mefenpyr and the fungicide are applied to the seed or plant in synergistic amounts, wherein the weight ratio of mefenpyr to fungicide is from 50:1 to 1:50.

2. The method according to claim 1 wherein the seed or the plant is treated with a composition comprising the fungicide and the safener.

3. The method according to claim 1 wherein the seed is treated with the fungicide and the safener.

4. The method according to claim 1 wherein the plant is treated with the fungicide and the safener.

5. The method according to claim 1 wherein the seed is in contact with the fungicide and the safener.

6. The method according to claim 1 wherein the plant is in contact with the fungicide and the safener.

7. The method according to claim 1 wherein the plant is a transgenic plant.

8. The method according to claim 1, wherein the weight ratio of mefenpyr-diethyl to the fungicide 10:1 to 1:20.

9. The method according to claim 1, wherein the fungicide is fluoxastrobin.

10. The method according to claim 1, wherein the fungicide is trifloxystrobin.

11. The method according to claim 1, wherein the fungicide is spiroxamine.

12. A method of controlling phytopathogenic fungi comprising treating a seed or a plant with mefenpyr-diethyl and a fungicide selected from fluoxastrobin, trifloxystrobin, or spiroxamine, wherein the mefenpyr and the fungicide are applied to the seed or plant in a weight ratio from 50:1 to 1:50.

13. The method according to claim 12, wherein the fungi is plasmodiophoromycetes, oomycetes, chytridiomycetes, zygomycetes, ascomycetes, basidiomycetes, or deuteromycetes.

14. The method according to claim 12, wherein the fungi is Erysiphe graminis, Pyrenophora teres, or Leptosphaeria nodorum.

15. The method according to claim 12, wherein the mefenpyr-diethyl and the fungicide are applied to the seed or plant simultaneously.

16. The method according to claim 12, wherein the mefenpyr-diethyl and the fungicide are applied to the seed or plant in succession.

17. The method according to claim 12, wherein a wheat plant is treated.

18. The method according to claim 12, wherein the fungicide is fluoxastrobin.

19. The method according to claim 12, wherein the fungicide is trifloxystrobin.

20. The method according to claim 12, wherein the fungicide is spiroxamine.

Description

EXAMPLE

Erysiphe Test (Wheat)/Curative

[0804] To prepare a suitable preparation of active compound, a commercial formulation of active compound is diluted with water to the desired concentration.

[0805] To test for curative activity, young plants were dusted with spores of Erysiphe graminis f.sp. tritici. 48 hours after the inoculation, the plants were sprayed with the preparation of active compound at the stated application rates.

[0806] The plants were placed in a greenhouse at a temperature of about 20 C. and a relative atmospheric humidity of about 80% to promote the development of mildew pustules.

[0807] Evaluation was carried out 7 days after the inoculation. 0% means an efficacy which corresponds to that of the control, whereas an efficacy of 100% means that no infection is observed.

TABLE-US-00014 TABLE Erysiphe test (wheat)/curative Active compound efficacy in % Active compounds application rate in g/ha found* calc.** Mefenpyr 25 0 Trifloxystrobin 125 86 Fluoxastrobin 125 0 Spiroxamin 125 0 Prothioconazole 125 43 Tebuconazole 125 57 Mefenpyr + Trifloxystrobin 1:5 25 + 125 100 86 Mefenpyr + Fluoxastrobin 1:5 25 + 125 100 0 Mefenpyr + Spiroxamin 1:5 25 + 125 86 0 Mefenpyr + Prothioconazole 1:5 25 + 125 100 43 Mefenpyr + Tebuconazole 1:5 25 + 125 100 57 *found = activity found **calc. = activity calculated using Colby's formula