RU2320170C1 - Herbicide composition - Google Patents

Abstract

FIELD: agriculture, herbicides.

SUBSTANCE: invention describes a herbicide composition comprising the following components, wt.-%: 2-methoxy-3,6-dichlorobenzoic acid and (C₇-C₁₀)-alcohols ester, or their mixture, 25-45; 3,6-dichloropyridine-2-carboxylic acid and (C₇-C₁₀)-alcohols ester, or their mixture, 15-42; surfactant, 15-35, and solvent, the balance. The herbicide composition is represented as emulsion concentrate. Invention provides the expanded spectrum in inhibition of weeds.

EFFECT: improved and valuable properties of composition.

3 cl, 2 tbl, 10 ex

Description

The invention relates to agriculture and can be used in the fight against perennial and difficult to eradicate perennial root weeds in crops of grain crops.

It is known to use 2-methoxy-3,6-dichlorobenzoic acid (dicamba) and 3,6-dichloropyridin-2-carboxylic acid (clopyralide) for these purposes in an individual form (Handbook of pesticides and agrochemicals approved for use in the Russian Federation. Appendix to the journal “Plant Protection and Quarantine”, No. 6, 2005, pp. 220, 225, 228, 229).

The main disadvantage of these drugs are:

- limited range of suppressed weeds;

- imperfect preparative form (BP salts, EDC), which affects both the effectiveness of the action and the economy as a whole.

Known synergistic herbicidal composition (prototype) containing 2,4-D, dicamba, chlorosulfuron and lontrel, the preparative form of which is an aqueous solution (Pat. 2219772 RF, 2003). The disadvantage of this composition is the chemical instability of chlorosulfuron in a water-based preparation, as well as the possibility of precipitation of active substances, which significantly impairs the quality of the formulation.

An object of the present invention is to provide a synergistic herbicidal composition based on clopiraralide and dicamba having an expanded weed control spectrum.

The problem is solved by using a combination of dicamba and clopyralide, presented in the form of esters of alcohols C ₇ -C ₁₀ normal or isostructure, used individually or in a mixture, with a mass ratio of (1.0 ÷ 3.0): 1, respectively, and creating the basis of this combination formulation in the form of an emulsion concentrate.

Moreover, the proposed composition contains, wt.%:

C ₇ -C ₁₀ 2-methoxy-3,6-dichlorobenzoic acid alcohol ester or a mixture thereof - 25-45 C ₇ -C ₁₀ 3,6-dichloropyridin-2-carboxylic acid alcohol ester or a mixture thereof - 15-42 Surface-active substance - 15-35 Solvent - the rest

Neonol 9-10, neonol 9-12, OP-7, OP-10, syntanol DS-10, syntanol ALM-10, emulsogen individually or together with sodium lauryl sulfate, calcium alkylbenzenesulfonate are used as surfactants.

As a solvent, alcohol C ₇ -C ₁₀ normal or isostructure, aromatic solvent nefras, cyclohexanone, xylene, petroleum solvent are used.

Example 1

Mix 42 g of dicamba ether of the C ₇ -C ₉ alcohols fraction, 42 g of clopyralide ether of the C ₇ -C ₉ alcohols fraction with 15 g of neonol AF 9-12 and 1 g of Nephras A 150/330 grade. The mixture is heated to a temperature of 40-50 ° C and stirred until complete mutual dissolution of the components. 2 g of the obtained concentrate are emulsified in 98 ml of water and the emulsion is kept in the settler for 4 hours.

Example 2

45 g of dicamba isooctyl ether, 32 g of clopiraralide isooctyl ether are mixed with 20 g of neonol AF 9-10 and 3 g of AP 120/200 brand Nefras. Further, as in example 1.

Example 3

44 g of dicamba n-octyl ether, 36 g of clopiraralide n-octyl ether are mixed with 15 g of OP-7 and 5 g of petroleum xylene. Further, as in example 1.

Example 4

25 g of dicamba decyl ether, 25 g of clopyralide decyl ether are mixed with 25 g of OP-10, 10 g of sodium lauryl sulfate and 15 g of oil solvent. Further, as in example 1.

Example 5

45 g of dicamba heptyl ether, 15 g of clopiralid heptyl ether with 18 g of ITN emulsogen and 22 g of cyclohexanone are mixed. Further, as in example 1.

Example 6

30 g of dicamba ether of the C ₇ -C ₉ alcohol fraction are mixed, 15 g of clopiralid isooctyl ether with 30 g of syntanol DS-10 and 25 g of alcohol of the C ₇ -C ₉ fraction. Further, as in example 1.

Example 7

25 g of dicamba isooctyl ether, 20 g of clopyralide ether of the C ₇ -C ₁₀ alcohols fraction are mixed with 25 g of syntanol DS-10, 10 g of calcium alkylbenzenesulfonate and 20 g of isooctyl alcohol. Further, as in example 1.

Example 8

25 g of dicamba decyl ether, 25 g of clopyralid decyl ether with 30 g of syntanol ALM-10 and 20 g of oil solvent are mixed. Further, as in example 1.

Example 9 is a prototype.

45 g of 2,4-D, 6 g of dicamba, 4 g of chlorosulfuron and 20 g of lontrel are mixed with a pre-prepared solution of 21 g of monoethanolamine in 4 g of water. After thorough mixing, 98 g of water is added to 2 g of the resulting solution and kept in a sump for 4 hours.

Example 10

Field experiments are carried out on wheat crops. The compositions according to examples 1-9 make on vegetative weeds in the phase of tillering of wheat. The main weed vegetation is white gauze, wild radish, chamomile, species of pikulniks, highlanders, shiritsa, as well as perennial root shoot weeds - field calf, yellow thistle, field bindweed. The total dose of herbicides for the active substance is 90 g / ha. The effectiveness of herbicides is estimated by the weight of weeds in the experimental and control plots in the phase of wheat maturation. Accounting for crops is carried out by threshing wheat. The plot area is 10 sq.m., the repetition is fourfold. НСР ₀₉₅ taking into account the crop ± 0.5 c / ha. The synergistic effect is evaluated by the Colby formula.

The data of table 1 show that the proposed composition (examples 1-8) has high stability compared to the prototype (example 9) and gives a high-quality working emulsion.

The results of field experiments on wheat (table 2) indicate that the proposed composition is synergistic and exceeds the prototype in herbicidal activity, which gives a yield increase of 4.8 ÷ 5.8 c / ha.

Table 1.
Composition (%) and properties of herbicide formulations No. of examples Active substance Ratio Surfactant Solvent Drug characteristics Fluid characteristics Ether of Dicamba Clopiraralide ester one 42 42 1: 1 fifteen one Homogeneous stable solution Highly stable emulsion 2 45 32 1.4: 1 twenty 3 Also Also 3 44 36 1.2: 1 fifteen 5 Also Also four 25 25 1: 1 35 fifteen Also Also 5 45 fifteen 3: 1 eighteen 22 Also Also 6 thirty fifteen 2: 1 thirty 25 Also Also 7 25 twenty 1.25: 1 35 twenty Also Also 8 25 25 1: 1 thirty twenty Also Also 9 (prototype) Active substance total Monoethanolamine Water 75 21 four Turbidity followed by precipitation solution

Table 2.
The results of field experiments on wheat No. of examples Dose by AI, g / ha Inhibition of weed weight,% Wheat crop Perennial root shoots Annual broadleaf c / ha ± Fact. Payment. Synergism Fact. Payment. Synergism one 45 + 45 97 69 +28 98 70 +28 25.8 +4.8 2 55 + 35 99 70 +29 97 70 +27 25.9 +4.9 3 50 + 40 98 71 +27 99 69 +30 26.5 +5.5 four 45 + 45 99 69 +30 98 70 +28 26.8 +5.8 5 70 + 20 98 71 +27 99 71 +28 26.6 +5.6 6 60 + 30 97 70 +27 96 68 +28 25.8 +4.8 7 45 + 40 99 69 +30 98 68 +30 26.7 +5.7 8 45 + 45 98 69 +29 97 70 +27 26,4 +5.4 9 (prototype) 90 65 66 22.8 +1.8 Dicamba 40 52 36 Dicamba 45 52 38 Dicamba fifty 55 42 Dicamba 55 56 43 Dicamba 60 58 45 Clopyralid thirty 28 42 Clopyralid 35 32 44 Clopyralid 40 36 48 Clopyralid 45 36 52 Clopyralid fifty 39 53 Control (no herbicides) 21.0

Claims (3)

1. Herbicidal composition based on the active substances of 2-methoxy-3,6-dichlorobenzoic acid and 3,6-dichloropyridine-2-carboxylic acid, characterized in that 2-methoxy-3,6-dichlorobenzoic acid and 3,6-dichloropyridine -2-carboxylic acid is represented by esters of C ₇ -C ₁₀ alcohols of normal or isostructure, used individually or in a mixture, with a mass ratio of (1.0-3.0): 1, respectively. 2. The herbicidal composition according to claim 1, characterized in that it contains components in the following ratio, wt.%: alcohol ester of C ₇ -C ₁₀ 2-methoxy-3,6-dichloro- benzoic acid or a mixture thereof 25-45 ester of alcohols C ₇ -C ₁₀ 3,6-dichloro- Ridin-2-carboxylic acid or a mixture thereof 15-42 surface-active substance 15-35 solvent rest 3. The herbicidal composition according to claim 1 or 2, characterized in that it is presented in the form of an emulsion concentrate.