HERBICIDE COMBINATIONS COMPRISING GLUFOSINATE AND PYRAFLUFEN-ETHYL

Abstract

The present invention relates to specific herbicide combinations comprising (i) L-glufosinate and/or salts thereof and (ii) pyraflufen-ethyl in specific ratios, and to compositions comprising said herbicide combinations in these ratios. The present invention further relates to a method of producing said specific herbicide combinations and compositions comprising said specific herbicide combinations. The present invention also relates to the use of said specific herbicide combinations and compositions comprising said specific herbicide combinations in the field of agriculture, for controlling harmful plants or undesired plant growth, as well as to corresponding methods.

Claims

1. A herbicide combination comprising (i) glufosinate, L-glufosinate, or an agronomically acceptable salt thereof, and (ii) pyraflufen-ethyl, wherein a ratio by weight of the total amount of component (i) is at least 100 times more than a total amount of component (ii) in case of (i) being glufosinate, and is at least 50 times more than the total amount of component (ii) in case of (i) being L-glufosinate.

2. The herbicide combination according to claim 1, wherein the ratio by weight of the total amount of component (i) to the total amount of component (ii) is from 3000:1 to 100:1 in case of (i) being glufosinate.

3. The herbicide combination according to claim 2, wherein the ratio by weight of the total amount of component (i) to the total amount of component (ii) is from 1500:1 to 250:1 in case of (i) being glufosinate.

4. The herbicide combination according to claim 1, wherein the ratio by weight of the total amount of component (i) to the total amount of component (ii) is from 1500:1 to 50:1 in case of (i) being L-glufosinate.

5. The herbicide combination according to claim 4, wherein the ratio by weight of the total amount of component (i) to the total amount of component (ii) is from 750:1 to 125:1 in case of (i) being L-glufosinate.

6. A composition comprising the herbicide combination according to claim 1, wherein the total amount of component (i) is from 100 to 600 g/L, based on the total amount of the composition.

7. The composition comprising the herbicide combination according to claim 6, wherein a total amount of component (ii) is in the range of from 0.03 to 6 g/L, in case of (i) being glufosinate, and in the range of from 0.7 to 12 g/L, in case of (i) being L-glufosinate, and in each case based on the total amount of the composition.

8. The composition comprising the herbicide combination according to claim 6, wherein the total amount of component (i) is in the range of from 100 to 600 g/L, and the total amount of component (ii) is in the range of from 0.03 to 6 g/L, in case of (i) being glufosinate, or the total amount of component (ii) is in the range of from 0.7 to 12 g/L, in case of (i) being L-glufosinate, and in each case based on the total amount of the composition.

9. The composition comprising the herbicide combination according to claim 6, and one or more further components selected from the group consisting of formulation auxiliaries, additives customary in crop protection, and further agrochemically active compounds.

10. The composition according to, wherein the composition is in the form of a suspension concentrate (SC), oil dispersion (OD), or in form of microcapsules.

11. A method for producing a herbicide combination as defined in claim 1, comprising (a) providing component (i), (b) providing component (ii), and (c) combining component (i) and component (ii), such that the herbicide combination is obtained.

12. A method for controlling undesired plant growth, and/or controlling harmful plants, comprising applying a herbicide combination as defined in claim 1 onto the undesired plants or the harmful plants, on parts of the undesired plants or the harmful plants, or on the area where the undesired plants or the harmful plants grow.

13. The method for treating or protecting row crops from undesired plants or the harmful plants according to claim 12, wherein the total amount of component (i) is applied in the range of from 300 to 1000 g/ha, in case of (i) being glufosinate, or the total amount of component (i) is applied in the range of from 150 to 500 g/ha, in case of (i) being L-glufosinate, and the total amount of component (ii) is applied in the range of from 0.1 to 10.

14. The method for treating or protecting speciality crops from undesired plants or the harmful plants according to claim 12, wherein the total amount of component (i) is applied in the range of from 300 to 6000 g/ha, in case of (i) being glufosinate, or the total amount of component (i) is applied in the range of from 150 to 3000 g/ha, in case of (i) being L-glufosinate, and the total amount of component (ii) is applied in the range of from 0.1 to 60.

15. (canceled)

Description

EXAMPLES

[0236] As shown in the biological examples herein below, for example the following harmful plants or undesired plants are controlled in a more effective and superior manner by application of the herbicidal combinations and compositions according to the present invention when compared to (L-)glufosinate alone: Bassia scoparia.

[0237] Synergism can be described as an interaction where the combined effect of two or more compounds is greater than the sum of the individual effects of each of the compounds. The presence of a synergistic effect in terms of percent control, between two mixing partners (X and Y) can be calculated using the Colby equation (Colby, S. R., 1967, Calculating Synergistic and Antagonistic Responses in Herbicide Combinations, Weeds, 15, 21-22):

[00001]$E=X+Y-\frac{\mathrm{XY}}{100}$

[0238] When the observed combined control effect is greater than the expected (calculated) combined control effect (E), then the combined effect is synergistic.

[0239] The following tests demonstrate the control efficacy of compounds, mixtures or compositions of this invention on specific crop and weedy plants. Weeds included Kochia (Bassia scoparia). However, the herbicidal effect afforded by the compounds, mixtures or compositions is not limited to these species. The analysis of synergism or antagonism between the mixtures or compositions was determined using Colby's equation.

[0240] Test Method:

[0241] Pots with 0.3 L of volume were filled with soil (SunGro Horticulture, Agawam, Mass. 01001) to grow one plant per pot in the greenhouse until the desired developmental stage. Environmental conditions inside the greenhouse were set up for 25° C., 75% relative humidity, and 12 h light day.sup.−1 with natural sunlight or 500 μmol m.sup.−1 s.sup.−1 PAR for cloudy days. Glufosinate applications were always performed in full sunlight to achieve maximum activity. The test period extended to 2 to 21 days after treatment. During this time, the plants were tended, and their response to the individual treatments was evaluated. The evaluation was carried out by visual control using a scale from 0 to 100. 100 means no emergence of the plants or complete destruction of at least the above-ground parts, and 0 means no damage, or normal course of growth. Data shown are the mean of three replications.

[0242] Products:

[0243] Glufosinate: 280 g a/l SL formulation

[0244] Pyraflufen-ethyl: 25 g a/l EC

[0245] Weeds in the Study:

TABLE-US-00001 Common Name Scientific Name Kochia Bassia scoparia
Post Emergence Treatment with the Mixture of Glufosinate with Pyraflufen-Ethyl

TABLE-US-00002 Herbicidal activity Application rate in against Kochia g ai/ha (21 DAT) Glufosinate Pyraflufen Found Calculated 420 — 25 — — 0.2 32 — 420 0.2 80 49