UA73203C2 - Herbicidal compositions on the basis of mesotrione and a method of inhibiting growth of undesirable vegetation - Google Patents

Abstract

Herbicidal formulations comprising (A) mesotrione (2-[4-methlysulfonyl-2-nitrobenzoyl]-1,3-cyclohexanedione), (B) about 0.3 to about 2.5 percent of crop oil concentrate or about 0.3 to about 2.5 percent of methylated seed oil, on a volume to volume basis, based on the total of (A), (B), (C) and (D), (C) about 0.5 to about 5% of a urea ammonium nitrate on a volume to volume basis, based on the total of (A), (B), (C) and (D), or about 0.5 to 5% based on dry weight, of ammonium sulphate fertilizer, based on the total weight of (A), (B), (C) and (D), and (D) a diluent.

Description

OUME-A-RAK by Neiijep Spetis! (MBO plus OAM).

Preferably, methylated seed oil is used in an amount of about 0.5 to about 2.0 percent by volume based on mesotrione, more preferably about 1 percent.

Preferably from about 1 to about 390, more preferably from 1 to 295 urea-ammonium nitrate fertilizers are used. From about 0.5 to about 295 ammonium sulfate is preferably used.

The thinner usually contains water. You can use other impurities, for example, buffer solutions, to adjust the pH. pH buffer substances are known to those skilled in the art. The pH buffer substance is a mixture of a weak acid with a virtually completely dissociated salt of said acid and/or a mixture of a weak base with a virtually completely dissociated salt of said base (see, e.g., Notrre SpPpetie Iehikop (Wotrr'5 Spetisa! Epsusioreadia, 7" eiaop, myoste 5, "neai moga Viybe!g") The pH of the buffer changes slightly when an acid or a base is added.

Preferred buffer substances with a preferred pH range of about 4 to about 11 are, for example, buffers that contain the following ions: acetate, phosphate, borate, carbonate, citrate, dimethylmalonate, nitrile-trimethylene phosphate. Also preferred are zwitterionic buffers, such as, for example, glycine or 2-(M-morpholino)ethanesulfonic acid (ME5) buffer. The buffer used usually depends on the pH range, for example, phthalate is usually used in the pH range of about 3 to about 4, acetate is usually used in the pH range of about 4 to about 5.5, phosphate is usually used in the pH range of about 5 .5 to about 7.5 and the carbonate is typically used in the pH range of about 9 to about 10. The acetate buffer pH system is used in concentrations such that the concentration in the composition is from about 0.1 to about 0.0 mol/L, preferably from about 0.15 to about 0.25 mol/L.

The acetate pH buffer system is usually introduced into the previous mixture of mesotrione-acetochlor in certain molar intervals. For each buffer system, the molar range is distinct and system-specific, but based on the buffer strength at the operating pH range.

Additional examples of commercially available buffering agents and additives include, but are not limited to,

VORREEV RZ from Neiep, which contains alkyl-para-aryl polyethoxyethanol phosphate and organic phosphoric acid, usually used in concentrations of about 0.5 to about 4 ri (about 0.24 to about 1.9 L) per 100 gallons (38 b0 L) VIOBREV EHTAA 5TAEMOITN from Neiep, which contains a mixture of alkyl polyethoxyethanol phosphate and organic phosphoric acid, usually used at a concentration of about 4 oz to about 2 ri (from about 0.095 to about 0.95 L) per 100 gallons (38 b0 L), VOREVSIUOE from

Sivute SPetis!5, which contains phosphoric acid, usually used at a concentration of about 1 to about 2 ri (about 0.47 to about 0.95 L) per 100 gallons (380 L), AEVOBIME and REMETAATOVA RI 5.

The compositions may be applied by air or soil by known techniques, typically 5-30 gallons (19-114L) per acre (0.4ha) when applied to the soil or 1-5 gallons (3.8-19L) per acre (0 ,4ha) when spraying in the air.

The quantities and proportions of components (B) and (C) indicated above are preferred embodiments of the invention.

It is believed that a range of about 0.1 to about 1.095 may be used in each case.

In an additional aspect, the invention relates to a method of suppressing the growth of unwanted vegetation, such as weeds, in the locus of desirable crops, such as cereals, which includes applying the above compositions to the locus of such vegetation. Examples of unwanted vegetation are limnocharis, axiris schirytseviy, hemp plant, palm amaranth, ivy-like morning glory, prickly breast, ragweed giant, ragweed, nightshade, black solanum, white quinoa, Pennsylvania pepper mustard, annual sunflower, common dahlia, hemp, milkweed, large-flowered purslane, blood glove, yellow foxtail and cochia.

Examples

A series of tests was conducted to evaluate the effect of admixtures on the suppression of broadleaf weeds by mesotrione. This series included tests on sown weeds and local weeds. Each trial was designed as a randomized complete block with three or more replications. Mesotrione was used as a spray solution containing 0.094 lb ai/A (105 g/ha, 3 oz/A) with MBO and SOC at 195 rpm. with or without SHOAM at 1 to 2,595 rpm. and AM5 at 8.5 lb/100 gal (about 195). Thirteen trials were conducted in 1999, in which 38 broadleaf weeds were evaluated, including limnocharis, axiris schirytsevi, hemp plantain, palm amaranth, morning glory, prickly breast, giant ragweed, ragweed, netreba, black nightshade, white quinoa , Pennsylvanian pepper mustard, annual sunflower, common dahlia, hemp, milkweed, large-flowered purslane, blood glove, yellow foxtail, and cochia. The high level of suppression observed in all treatments in 20 cases out of 38 data sets indicated tends to mask the effect of impurities (see Table 1).

Table 1

Effect of impurities on suppression of broadleaf weeds by mesotrione.

Test data: N-99-0577-52

OO 0 0 0 0 OO Solo 38 trials of the vekozhanyayu 35353333 GE weeds bo y»90o

Mesotrione 0.094 lb and SOS

Mesotrione 0.094 lb - SOS with SHAM 195

Mesotrione 0.094 lb I SOS t SAM 2.595

Mesotrione 0.094 lb 7 SOS with AM5

Mesotrione 0.094 lb ich SHAM 195 11117691

Mesotrione 0.094 lb 5 SAM 2.596

Mesotrione 0.094 lb same AM5 77771716 | 19

All herbicide application rates are given in pounds of active ingredient per acre (156 ai/A). 0.094 lb/A means about 105g/ha.

Impurity rates were 195 M5O, 195 SOC, 1 and 2.595 SAM and 8.5 lb/100 gallons (about 195)

AM5.

The best demonstration of the potential effect of admixtures is in tests conducted under conditions that were not favorable for herbicidal activity, or on weeds whose suppression is difficult only with mesotrione.

Mesotrione applied with a combination of SOC or M5O plus OAM or AM5 gave significantly better weed control results than mesotrione applied with SOC or M5O alone (see Table 2).

Impurities also affect crop damage.

This is best demonstrated by observing the frequency of damage occurring in a large number of trials conducted between 1996 and 1999. All of these trials were designed as randomized complete blocks with at least three replications. Mesotrione was applied at a rate of 0.094 lb ai/A (105 g aha) (3 oz/A) plus 195 vol./06. SOS or M5O with and without CAM at 2,595 rpm. or AM5 at 8 to 17 lb/100 gal (about 1-295). Combinations of SOS plus CAM or AM5 resulted in a lower incidence of crop damage than MBO plus OAM or AM5 (see Table 3).

Table 2

Effects of additives from selected tests (harmful conditions (OH) and difficult-to-control weed species (AMVEI and AMVTA))

Test data; N-99-0577-52 ron on 7771711 UM 1 mm | Mo Average!

Lemon-charis Ambrosia Ambrosia Ambrosia |Ambrosia

АВТ polynolysta polynolysta Giant giant

AMVEIG. AMVEIG. AMVTA | AMVTA 28OAA re Z2OAA 28OAA gvgA 6-8 sheets of pist 8-9 sheets 5 sheets of pist 8-10 5-7 8-9 2-6 in

Mesotrione 0.094

Mesotrione 0.094

Mesotrione 0.094 63 lb-M5O--SHAM 2.590

Mesotrione 0.094

Mesotrione 0.094 o Meumesby | 151

Mesotrione 0.094

Mesotrione 0.094

Mesotrione 0.094

Mesotrione 0.094

Mesotrione 0.094

Mesotrione 0.094

Because 1505 9 | yusht10 | ride | ride | 8 "Drought conditions

All herbicide application rates are given in pounds of active ingredient per acre (15 ai/A).

Admixture rates were 195 M5O, 1,956 SOC, 1 and 2.5 OAM, and 8.5 IU/100 gallons (about 190) AM5

Table C

Effect of admixture on frequency of crop damage when using 0.094 lb ai/A (105g/ha) of mesotrione with different admixtures

Maximum Damage Observed (at 95) o Impurity |medium|Proof| "5 | 5-0 | 10-15 | 15-20 | 20-25 | 25-30 | 530 sost" | 06 | 60 | 98) 2 | 0 | 0 | 0 | about | at. cOsbtoeOAM2vo | 18 | 101 | 90| 6 | with | 0 | 1 | about | at. sostzheAM5 | 1.6 | 15 | 80 | 201 0 1 0 1 0 | about | oh mot | 06 | 29 |l100,Y 0 | 0 | 0 | 0 1 o |o

MBO to6zOAM2.59 | 30 | with 8 | 76 | 71 | 5 | 8 | 0 | about | at.

MBO AM5 | 55 | 25 | 68| 8 | 4 | 12 | 4 | 4

Examples of preferred compositions based on 100 gallons (379 L) of a solution of the composition for a typical application of 10 gallons (Zbl) per acre (0.4 ha) 1. (A) 30 oz (1 kg) (2--4-methylsulfonyl-2-nitrobenzoyl|- of 1,3-cyclohexanedione) (B) 1 gallon (3.bl) of crop oil concentrate (C) 1.5 gallons (5.7L) urea-ammonium nitrate and (0) water - the remainder. 2. (A) 30 oz (1 kg) (2--4-methylsulfonyl-2-nitrobenzoyl)|-1,3-cyclohexanedione), (B) 1 gallon (3.vl) methylated seed oil, (C ) 17 pounds (7.7 kg) of ammonium sulfate fertilizer and (0) water - the rest. 3. (A) 30 oz (1 kg) of (2-(4-methylsulfonyl-2-nitrobenzoyl|-1,3-cyclohexanedione). (B) 1 gallon (3.bl) of crop oil concentrate, (C) 1 .5 gallons (5.7L) urea-ammonium nitrate and (0) water - the rest.