Method of reducing crop damage

Abstract

The present invention relates to a method of reducing crop damage by treating the seed of the crop with the safener before sowing. This can be done in addition to the use of crop protection combinations/compositions, in particular herbicide/safener combinations and compositions comprising thereof, which are highly suitable to protect crops from herbicide damage in pre- and post-emergence treatments.

Claims

1. A method of reducing crop damage in winter wheat (TRZAW), comprising treating seed of the crop with a safener before sowing (1) and applying aclonifen (compound I) or combinations/compositions comprising thereof and a safener in a pre-emergence treatment (2), wherein the safener is mefenpyr-diethyl.

2. The Method according to claim 1 wherein the composition in 2 comprises in addition to said compound I, at least one further herbicide selected from the group consisting of: 2-(2,4-dichlorophenyl)methyl-4,4-dimethyl-3-isoxazolidinone, bromoxynil, bromoxynil-butyrate, -potassium, -heptanoate, and -octanoate, benzofenap, butachlor, 2,4-D, 2,4-D-butotyl, -butyl, -dimethylammonium, -diolamin, -ethyl, -2-ethylhexyl, -isobutyl, -isoctyl, -isopropylammonium, -potassium, -triisopropanolammonium, and -trolamine, bicyclopyrone, cinmethylin, diflufenican, dimethenamid, ethoxysulfuron, fenoxaprop, fenoxaprop-P, fenoxaprop-ethyl, fenoxaprop-P-ethyl, fenquinotrione, fentrazamide, florasulam, florpyrauxifen-benzyl, flufenacet, fluroxypyr, fluroxypyr-meptyl, foramsulfuron, iodosulfuron, iodosulfuron-methyl-sodium, isoproturon, isoxaflutole, lancotrione, mefenacet, mesosulfuron, mesosulfuron-methyl, metolachlor, S-metolachlor, metribuzin, metosulam, nicosulfuron, oxadiargyl, oxadiazon, pethoxamid, prosulfocarb, pyrasulfotole, pyroxasulfone, pyroxsulam, tefuryltrione, tembotrione, thiencarbazone, thiencarbazone-methyl, tolpyralate, and triafamone, pendimethalin, propoxycarbazone, halauxifen-methyl, 2-methyl-4-chlorophenoxyacetic acid (group II).

3. The Method according to claim 1 wherein the crop is a genetically modified plant.

Description

EXAMPLES

(1) 1. Method as Used in the Prior Art

(2) For the Untreated control, wheat seeds (winter wheat, TRZAW) were placed in sandy loam soil in pots of a diameter of 7 cm, covered with soil and cultivated in a greenhouse under good growth conditions.

(3) Post-emergence application was done when the plants had reached growth stage BBCH11 (BBCH is the international coding system for the growth stage of crops and weeds).

(4) The herbicide (Compound I) was formulated as suspension concentrate (SC).

(5) The safener (mefenpyr-diethyl) was formulated as wettable powder (WP).

(6) The compounds were sprayed onto the green parts of the plants as an aqueous suspension at an equivalent water application rate of 300 l/ha.

(7) The combination of herbicide and safener was applied as a tank mix.

(8) After application, the test plants were kept in the greenhouse under good growth conditions. 14 days after application, % crop damage observed on the treated plants was scored visually in comparison to untreated controls.

(9) Values in the table below are mean values from at least 3 replicates.

(10) TABLE-US-00001 Safener Safener dosage Herbicide dosage in in seed % dosage tank mix treatment crop Treatment (g/ha) (g/ha) (g/kg) damage Herbicide post-em. 1500 — — 17 Herbicide post-em. + 1500 200 — 8 Safener in tank mix Untreated — — — 0
2. Method A

(11) For the Untreated control, wheat seeds (winter wheat, TRZAW) were placed in sandy loam soil in pots of a diameter of 7 cm, covered with soil and cultivated in a greenhouse under good growth conditions.

(12) For the safener seed treatment, sufficient seeds were weighed into screw top glass bottles approximately twice the volume of the seeds.

(13) The safener (mefenpyr-diethyl, formulated as suspension concentrate (SC)) was weighed out so that the required rates (g a.i./kg seed) would be obtained, dissolved in water (1 ml water per 10 g of seeds), and added to the seeds to produce a slurry.

(14) The bottles were capped and then placed in an overhead shaker (set at medium speed for up to 1 hour) so that the seeds were evenly coated with the slurry. The bottles were uncapped and the seeds were sown as described above.

(15) For the seed treatment process, the blind formulation (the SC formulation without the safener mefenpyr-diethyl) was used as seed treatment as described above.

(16) Post-emergence application of the herbicide was done when the plants had reached growth stage BBCH11.

(17) The herbicide (Compound 1) was formulated as suspension concentrate (SC) and was sprayed onto the green parts of the plants as an aqueous suspension at an equivalent water application rate of 300 l/ha.

(18) After application, the test plants were kept in the greenhouse under good growth conditions. 14 days after application, % crop damage observed on the treated plants was scored visually in comparison to untreated controls.

(19) Values in the table below are mean values from at least 3 replicates.

(20) TABLE-US-00002 Safener Safener dosage Herbicide dosage in in seed % dosage tank mix treatment crop Treatment (g/ha) (g/ha) (g/kg) damage Herbicide post-em. 1500 — — 17 Safener seed treatment + 1500 — 0.5 2 Herbicide post-em. Safener seed treatment — — 0.5 0 Seed treatment process — — — 0 Untreated — — — 0
3. Method C

(21) For the Untreated control, wheat seeds (winter wheat, TRZAW) were placed in sandy loam soil in pots of a diameter of 7 cm, covered with soil and cultivated in a greenhouse under good growth conditions.

(22) For the safener seed treatment, sufficient seeds were weighed into screw top glass bottles approximately twice the volume of the seeds.

(23) The safener (mefenpyr-diethyl, formulated as suspension concentrate (SC)) was weighed out so that the required rates (g a.i./kg seed) would be obtained, dissolved in water (1 ml water per 10 g of seeds), and added to the seeds to produce a slurry.

(24) The bottles were capped and then placed in an overhead shaker (set at medium speed for up to 1 hour) so that the seeds were evenly coated with the slurry. The bottles were uncapped and the seeds were sown as described above.

(25) For the seed treatment process, the blind formulation (the SC formulation without the safener mefenpyr-diethyl) was used as seed treatment as described above.

(26) Post-emergence application was done when the plants had reached growth stage BBCH11.

(27) The herbicide (Compound I) was formulated as suspension concentrate (SC).

(28) The safener (mefenpyr-diethyl) was formulated as wettable powder (WP).

(29) The compounds were sprayed onto the green parts of the plants as an aqueous suspension at an equivalent water application rate of 300 l/ha.

(30) The combination of herbicide and safener was applied as a tank mix.

(31) After application, the test plants were kept in the greenhouse under good growth conditions. 14 days after application, % crop damage observed on the treated plants was scored visually in comparison to untreated controls.

(32) Values in the table below are mean values from at least 3 replicates.

(33) TABLE-US-00003 Safener Safener dosage Herbicide dosage in in seed % dosage tank mix treatment crop Treatment (g/ha) (g/ha) (g/kg) damage Herbicide post-em. 1500 — — 17 Safener seed treatment + 1500 200 0.5 2 Herbicide post-em. + Safener in tank mix Safener in tank mix — 200 — 5 Safener seed treatment — — 0.5 0 Seed treatment process — — — 0 Untreated — — — 0
4. Method D

(34) For the Untreated control, wheat seeds (winter wheat, TRZAW) were placed in sandy loam soil in pots of a diameter of 7 cm, covered with soil and cultivated in a greenhouse under good growth conditions.

(35) For the safener seed treatment, sufficient seeds were weighed into screw top glass bottles approximately twice the volume of the seeds.

(36) The safener (mefenpyr-diethyl, formulated as suspension concentrate (SC)) was weighed out so that the required rates (g a.i./kg seed) would be obtained, dissolved in water (1 ml water per 10 g of seeds), and added to the seeds to produce a slurry.

(37) The bottles were capped and then placed in an overhead shaker (set at medium speed for up to 1 hour) so that the seeds were evenly coated with the slurry. The bottles were uncapped and the seeds were sown as described above.

(38) For the seed treatment process, the blind formulation (the SC formulation without the safener mefenpyr-diethyl) was used as seed treatment as described above.

(39) For the pre-emergence application, the herbicide (Compound I) was formulated as suspension concentrate (SC), the safener (mefenpyr-diethyl) was formulated as wettable powder (WP).

(40) The compounds were sprayed to the soil surface as an aqueous suspension at an equivalent water application rate of 300 l/ha.

(41) The combination of herbicide and safener was applied as a tank mix.

(42) After application, the test plants were kept in the greenhouse under good growth conditions. 14 days after application, % crop damage observed on the treated plants was scored visually in comparison to untreated controls.

(43) Values in the table below are mean values from at least 3 replicates.

(44) TABLE-US-00004 Safener Safener dosage Herbicide dosage in in seed % dosage tank mix treatment crop Treatment (g/ha) (g/ha) (g/kg) damage Herbicide pre-em. 1000 — — 12 Herbicide pre-em. + 1000 200 — 18 Safener in tank mix Safener seed treatment + 1000 — 0.5 3 Herbicide pre-em. Safener seed treatment + 1000 200 0.5 1 Herbicide pre-em. + Safener in tank mix Safener in tank mix — 200 — 5 Safener seed treatment — — 0.5 2 Seed treatment process — — — 0 Untreated — — — 0