Fungicidal mixtures for soybean diseases

A method of increasing soybean grain yield under pressure from sudden death syndrome (SDS) and/or soybean cyst nematode (SCN), the method comprising growing a soybean seed treated with a fungicidally effective mixture comprising a first fungicide and a second fungicide, wherein (i) the first fungicide and second fungicides are succinate dehydrogenase inhibitors;

• (ii) first fungicide is present in a weight ratio of about 10:1 to about 1:2 of the second fungicide;
• and thereby increasing soybean grain yield.

A soybean seed coated with a fungicidal mixture comprising penthiopyrad at a concentration of about 0.05-0.50 mg active ingredient per seed and fluopyram at a concentration of about 0.025-0.45 mg active ingredient per seed, wherein the fungicidal mixture is effective in controlling sudden death syndrome (SDS).

A method reducing seedling chlorosis or crop response in soybean, the method comprising applying to a soybean seed a fungicidal mixture comprising penthiopyrad at a concentration of 0.25 mg active ingredient per seed and fluopyram at a concentration of about 0.075 mg active ingredient per seed and growing the soybean seed in a field suspected of having pressure from SCN and/or SDS.

A method of pest resistant management in soybeans grown under SDS and/or SCN pressure, the method comprising applying a fungicidal mixture comprising at least two SDHI fungicides wherein the two SDHI fungicides are not both carboxamides and wherein the non-carboxamide fungicide is used at a rate that is less than the full rate at which the non-carboxamide fungicide effectively controls SDS in soybeans.

A fungicidal mixture composition comprising at least a first fungicide and a second fungicide, wherein (i) the first fungicide and second fungicides are non-identical succinate dehydrogenase inhibitors;

• (ii) first fungicide and the second fungicides are present in an amount wherein the individual amount of the first fungicide and/or the second fungicide alone is not effective to substantially control SDS and/or SCN in soybeans.

A pesticidal mixture composition comprising at least two non-identical succinate dehydrogenase inhibitors (SDHI) effective for controlling soybean SDS in the absence of substantial chlorosis at or before 3-leaf stage or at the cotyledon stage after emergence, wherein the first SDHI is fluopyram and is present on a soybean seed at a rate of about 0.075-0.15 mg ai/seed and wherein the second SDHI is non-identical to fluopyram and is present on the soybean seed in an amount that is effective, along with fluopyram, to control SDS in soybean.