DD223909A1 - HERBICIDE MEDIUM - Google Patents

Abstract

The invention relates to novel herbicide combinations for the control of annual ungulates, including millet species, in particular in maize cultures and in fruit production. As active ingredients they contain 2-chloro-4,6-diethylamino-1,3,5-triazine, 2-chloro-4-ethylamino-6-isopropylamino-1,3,5-triazine and N, N-bis- (2 , 2,2-trichloro-1-hydroxyethyl) urea.

Description

N-C C-W

and the Pormel

» - £ .- CM I

II

CH ₂ CH ₃

• and compounds of formula V

Il '

- CHOH - HH - C - NH - CHOH -

contained, are suitable for controlling undesirable plant growth in maize and fruit crops, and in asparagus.

Surprising and unpredictable in the prior art was the fact that inventive combinations a particularly broad and selective herbicidal activity against monocotyledonous and dicotyledonous weeds

respectively. ^

Particularly noteworthy is that in important, sometimes difficult to control weeds clearly synergistic effects

occur. ·

Another valuable property of the combinations according to the invention is that the increase in activity is limited to certain weed species and the crop plant compatibility is not impaired.

A particular advantage of the combinations of the invention is the use sowohj before and after emergence of the corn. This is all the more important for the user, since the application date can be varied during the peak of the workday.

Furthermore, it has been found that combinations of certain triazine derivatives with dichloroalcohol lead to a favorable influence on the metabolic performance of the crop plants.

This finding is novel and underlines the importance and favorable utility properties of the new herbicidal compositions, thus providing a valuable enrichment to weed control in maize and fruit crops.

The mixing ratio of the components may vary widely depending on the prevalent weed flora and the environmental and site conditions. In general, 0.5 to 2.0 parts by weight of active compound of the formula II and 5 to 20 parts by weight of active compound of the formula III are attributable to one part by weight of active compound of the formula I. Preferably herbicide combinations are used, in addition to the usual excipients and carriers per hectare 0.32-0.48 kg of active ingredient of the formula 1.0.25-0.50 kg of active ingredient of the formula II and 3.6 to 4.8 kg of active ingredient Formula III included. These low application rates of Triazinwirkstoffen in the combinations of the invention allow a safe replica of triazine-sensitive cultures such. As winter barley and sugar beet, too.

The herbicidal combinations are used in the preparation or application forms customary for herbicides, such as solutions, emulsions, suspensions, powders, pastes and granules with the addition of liquid and / or solid carriers or diluents, usually with the addition of surface-active substances and other formulation auxiliaries prepared and diluted with water for application.

The application forms depend on the intended use. In any case, they must ensure a fine and even distribution of the active substances. The preparation of the active compound combinations according to the invention is carried out in a known manner by mixing or milling.

The herbicidal compositions of the invention may be used in combinations with other crop protection and pest control agents, fertilizers or agrochemicals.

Embodiments. ,

To demonstrate the herbicidal action of the combinations according to the invention, a large number of experiments were carried out on arable land and in orchards.

In maize crops, the treatment was carried out both in the pre-emergence, ie before emergence of crops and before emergence of monocotyledonous and dicotyledonous weeds, and postemergence, that is after emergence of crops and dicotyledonous weeds, no more than four leaves have formed, but even before emergence

the millet species. \

In crops of soft fruit, pome fruit and stone fruit, treatment was carried out before the fruit crops were expelled and before emergence or expulsion of the monocotyledonous and dicotyledonous weeds. The evaluation of the control success and the compatibility was made after the notes 1 to 9. Mean ·

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Boniturnote damage 1 100-96 2 95-86 3 85-71 4 70-56 5 55-46 6 45-31 7 30-16 8th 15-6 9 5-0

The results of the numerous experiments are summarized in Tables 1 to 5.

A = 2-chloro-4,6-diethylamino-1,3,5-triazine B = 2-chloro-4-ethylamino-6-isopropylamino-1,3,5-triazine C = N, N'-bis- < 2,2,2-trichloro-1-hydroxy-ethyl) urea D = 2,6-diethyl-N-methoxymethyl-chloroacetanilide (alachlor) E = N-phenyl-1-N-dimethyl-urea The following were crops and weeds used for the evaluation of the control success and the compatibility:

I maize

II red currant

III apple

IV sweet cherry

V sour cherry

VI chicken millet

VII Blood-red crabgrass

VIII Green Bristle Millet

IX Annual Rispensgras

X White goosefoot

XI Krummer Foxtail

XII Curlworm

XIII Ackersenf

XIV chickweed

XV Stemnetendes grasping nettle

XVI Real fume

XVII Solstice Milk

XVIII Kleinblütiges buttonweed

XIX Small stinging nettle

XX. Thlaspi arvense

Zea Mays Ribes rubrum Malus domestica Cerasus avium Cerasusvulgaris Echinochloa crus-galli Digitaria sanguinalis Setaria viridis Poaannua

Chenopodium album Amaranthus retroflexus Polygonum convolvulus Sinapisarvensis Stellaria media Lamium ämplexicaule Fumaria officinalis Euphorbia heiioscopia Galinsoga parviflora Urtica urens Thlaspi arvense

They are indicated in the tables by the Roman numerals.

Table 1

Herbicidal action of the combinations according to the invention against the aforementioned grass weeds and weeds in maize crops in pre-emergence application

Active ingredient application rate corn weeds weeds

kg / ha I Vl VII VIII X Xl XII XIII XVII XVII XX

A 0.32 9 9 9 9 9 9 9 8th 9 8th to 0.48, 9 7 8th 8th 8th 8th 8th 7 9 7 , 7 0.72 9 6 6 6 7 7 6 5 8th 5 6 ' 1.60 9 4 4 5 4 6 4 3 7 4 4 B 0.25 9 9 9 9 9 -. 9 9 -8th 8th 9 8th 0.50 9 7 8th 8th 7 9 7 6 ^Λ 6 8th 7 0.75 9 6 8th 7 6 8th 6 5 5 7 ... 6 1.00 9 5 7 6 4 8th 5 4 4 7 5 1.50 9 4 6 5 3 7 4. 3 4 6 4 C 3.60 9 8th 8th 8th 8th 9 8th 7 8th 9 8th - 4.80 9 7 8th 8th 7 8th 8th 7 7 8th 7 6.00 8th , 5. 6 7 6 8th 7 6 6 8th 7 7.20 7 4. 5 6 5 , 7 7 5 6 8th 5. A + B + C 0.32 + 0.25 + 3.60 9 3 - ' 3 3 3 4 3 - 2 3 4 3 0.32 + 0.25 + 4.80 9 2 2 2 1 3 2 1 2 3 2 (OF INVENTION 0.32 + 0.50 + 3.60 9 2 2 2 2 2 2 1 1 2 1 dungsge 0.32 + 0.50 + 4.80 9 1 2 1 1 2 1 1 1 2 1 Mäss) 0.48 + 0.25 + 3.60 9 2 1 2 1 2 2 1 1 2 1 0.48 + 0.25 + 4.80 9 1 1 1 1 2 1 1 1 2 1 0.48 + 0.50 + 3.60 9 1 · 1 1 1 2 1 1 1 , 1 1 0.48 + 0.50 + 4.80 9 1 1 1 1 1 1 1 1 1 1 D 1.92 9 3 2 3 5 6 9 7 6 7 6 alachlor 2.88 9 1 1 2 4 5 8th 4 5 5 3 (known)

The combinations according to the invention A + B + C fight with good corn compatibility equally monocotyledonous and dicotyledonous weeds. The known active ingredient D is not sufficiently effective against dicotyledonous weeds. "

Table 2 '

Herbicidal action of the combinations according to the invention against the above-mentioned weeds and weeds in maize cultures in postemergence application

Active ingredient application rate corn weeds weeds

kg / ha I Vl VII VIII X Xl XII XIII XVIII. XX

A 0.32 9 9 9th 9 8th . 8th 7 5 6 7 0.48 9 7 8th 8th 6 7 6 4 5 5 0.72 9 6 5 7 4 '5 5 3 4 3 1.60 9 4 4 6 3 4 3 1 2. 2 B 0.25 9 θ 9 9 7 8th 8th 5 6 7 0.50 9 7 8th 8th 7 7 6 3 5 6 0.75 9 6 8th 7 6 5 6 2 4 5 1.00 9 5 7 6 3 3 5 1 3 4 1.50 9 4 *. 5 6 2 3 4 1 2 2 C - 3,60 9 8th 8th 8th 8th 9 8th 6 8th 7 4.80 9 7 8th 8th 6 8th 7 5 6 6 6.00 8th 5 6 7 5 7 7 4 5 5 7.20 7 4 ' 5 6 4 6 6, 3 4 4 A + B + C 0.32 + 0.25 + 3.60 9 3 3 3 3 4 3 1 3 3 0.32 + 0.25 + 4.80 9 2 ·> 2 2 1 3 2 1 2 2 (OF INVENTION 0.32 + 0.50 + 3.60 9 2 2 2 2 3 1 1 1 2 Dungs 0.32 + 0.50 + 4.80 9 1 2 1 2 2 1 1 1 1 according to) 0.48 + 0.25 + 3.60 9 2 1 2 1 2 2 1 1 1 0.48 + 0.25 + 4.80 9 · 1 1 1 1 2 1 1 1 1 0.48 + 0.50 + 3.60 9 1 1 1 .1 2 1 1 ,1 1 0.48 + 0.50 + 4.80 9 1 , 1 1 1 ' 1 1 1 1 · 1 D 1.92 7 3 2 2 7 7 7 5 7 6 alachlor 2.88 5 1 1 1 5 6 4 3   4 3 (known)

The application was made before weeding the weeds and after emergence of the corn and the weeds. The combinations A + B + C according to the invention are tolerated by maize and fought against the weeds, which later also come from larger depths. A postemergence application of alachlor causes phytotoxic effects on maize.

Table 3

Herbicidal action of the combinations according to the invention in fruit cultures before emergence of the monocotyledonous and dicotyledonous weeds

Table 3 application rate fruit crops IN THE IV V weeds , IX weeds XII XIV XV XVIII XIX active substance kg / ha Il 9 9 , 9 Vl 8th xl 9 8th 9 9 9 0.32 9 9 9 9 9. 7 9 8th • 7 8th 8th 8th A 0.48 - 9 '9 9 9 7 6 8th 6, 4 6 6 7 0.72 9 9 9 9 6 4 7 5 '3 4 5 6 1.60 9 9 9 9 5 8th 6 9 9 8th 9 8th 0.25 9 9 9 9 9 7 9 8th 6 6 7 7 B 0.50 9 9 9 9 8th 6 8th 7 5 5 6 6 ·. , 0.75 9 9 9 9 7 5 8th 6 5 4 5 5, 1.00 9 9 "9 9 6 4 7 5 4 3 5 4 1.50 9 9 9 9 5 7 6 8th 9 9 8th 8th 3.60 9 9 9 9 7 6 9 8th 8th 8th 8th 7 C 4,80. . 9 9 9 9 6 5 8th 7 8th 7 8th 7 6.00 -. 9 9 9 9 5 4 8th 6 ' 7 6 7 6 7.20 9 9 9 9 4 3 7 3 3 2 4 2 0.32 + 0.25 + 3.60 9 9 9 9 3 2 4 2 2 1 3 2 A + B + C 0.32, + 0.25 + 4.80 9 9 9 9 2 1 3 2 1 1 χ 2 1 0.32 + 0.50 + 3.60 9 9 9 9 '2 1 2 1 1 1 2 1 (OF INVENTION 0.32 + 0.50 + 4.80 9 9 9 9 1 1 2 2 1 1 2 1 Dungs 0.48 + 0.25 + 3.60 9 9 9 9 2 1 2 1 1 1 1 1 according to) 0.48 + 0.25 + 4.80 9 9 9 9 1 1 2 1 .1 1 1 1 0.48 + 0.50 + 3.60 9 9. 9 9 1 1 1 1 1 1 1 1 0.48 + 0.50 + 4.80 9 9 9 9 1 6 1 5 3 2 8th - 7 0.9 + 0.6 9 9 9 8th 2 9 2 1 1 6 4 B + E 1.5 + 1.0 8th 4 7 (known)

The combinations according to the invention have a better action against monocotyledonous and dicotyledonous weeds than the known combination

B + E (atrazine + fenuron) ~

From Tables 1, 2 and 3, the very good effect of the Wirkstoffkornbinationen invention against monocots

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According to the calculation method described by S.R. Colby (Weeds 15 [1967] 1, p. 20-22), the synergism can be demonstrated as follows:

10 000

X ₁ = weed stock in compounds A with ρ kg / ha

y, = weed stock on compound Bmitqkg / ha

z, = weed stocking compound C at r kg / ha

E ₁ = expected additive weed stock after the application of the compounds A + B + C with the application rates

E _H = experimentally determined weed stock after the application of the compounds A + B + C with the application rates

ISTE ₁ He so liegtein synergism. ,

IStE ₁ = E _R , the effect is additive ·.

IstE ₁ EfvSoliary Antagonistic Effect.

Table 4

Determination of the synergistic effect of barnyardgrass, annual bluegrass and curvaceous

¹¹ . , in%

active substance application rate Stock of chicken millet egg yearling E ₁ wind E ₁ kg / ha bluegrass knotweed He 8th . He He A 0.32 100 90 100 ' 0.48 90 80 90 B 0.25 100 90 100 0.50 '80 80 80 C 3.60 90 90 80 64.8 90 90 «<4,80 80 80 60 48.6 90 90 A + B + C 0.32 + 0.25 + 3.60 25 64 25 57.6 25 72 (erfijv 0.32 + 0.25 + 4.80 10 48 10 43.2 10 72 Droppings 0.32 + 0.50 + 3.60 10 81 0 57.6 10 81 according to) 0.32 + 0.50 + 4.80 0 72 0 43.2 0 81 0.48 + 0.25 + 3.60 ' 10 64.8 0 51.2 10 64.8 0.48 + 0.25 + 4.80 0 43.2 0 38; 4 0 64.8 0.48 + 0.50 + 3.60 0 0 0 0.48 + 0.50 + 4.80 0 0 0

1 The stocking was rated with numbers 1 to 9 and then expressed as a percentage.

It is clear from Table 4 that the found weed stock of the combinations according to the invention is smaller than the calculated, that is, there is a real synergistic effect.

To demonstrate the improved metabolic performance of corn by the combinations according to the invention, yield determination was carried out in four experiments. The results are shown in Table 5 below.

Table 5

Influence on the yield of silage maize by the combinations according to the invention in pre-emergence application active substance application rate fresh mass in dt / ha

kg / ha Experiment 1 Experiment 2 Experiment 3 Experiment 4 χ rel.%

control - 355.3 368.5 313.4 368.0 351.3 100.0 handgejätet 0.32 + 0.25 + 3.60 365.3 370.3 312.9 375.3 356.0 101.3 A + B + C 0.32 + 0.25 + 4.80 367.4 374.6 309.2 384.3 358.9 102.2 0.32 + 0.50 + 3.60 367.5 378.2 316.7 379.4 360.5 102.6 0.32 + 0.50 + 4.80 375.7 384.7 330.1 401.6 373.0 106.2 0.48 + 0.25 + 3.60 378.2 385.1 331.4 394.2 372.2 106.0 0.48 + 0.25 + 4.80 384.7 ¹ 399.2 344.1 396.4 381.1 108.5 0.48 + 0.50 + 3.60 379.4 394.7 338.8 393.1 376.5 107.2 0.48 + 0.50 + 4.80 383.7 394.0 345.1 397.2 380.0 108.2

By using the combinations according to the invention, an additional yield of up to 8.5% is achieved in comparison to the control plots kept free of weeds.

Claims (2)

-1- 261933 1 Invention claim: Herbicidal agents for the selective control of annual weeds, including millet species, characterized in that they contain the active ingredients 2-chloro-4,6-diethylamino-1,3,5-triazine (II), 2-chloro-4, in addition to customary excipients and carriers -ethylamino-6-isopropyl-amino-1,3,5-triazine (II) and N, N'-bis- (2,2,2-trichloro-1-hydroxyethyl) urea (III) at rates of 0, 1 to 0.5kg AS / ha (I), 0.1 to 0.5kg AS / ha (II) and 2.0 to 5.0kg AS / ha (III) and in pre and postemergence maize crops and in Berry, pome and stone fruit as well as in asparagus cultures before budding are used. Field of application of the invention. The invention relates to novel herbicide combinations for the selective control of monocotyledonous and dicotyledonous weeds in maize cultures and in fruit growing in the pre- and postemergence. Characteristic of the known technical solutions It is known that triazine derivatives are used in many agricultural and horticultural crops for controlling monocotyledonous and dicotyledonous weeds (CH-PS 329277, DE-PS 1011904). The following triazines have acquired special significance: 2-Chloro-4,6-diethylamino-1,3,5-triazine and 1-chloroethylamino-e-isopropylamino-IAo-triazine. It is also known that dichlorourea is used as a soil herbicide for controlling monocotyledonous and dicotyledonous weeds. The active substances mentioned show, depending on the dosage, a good compatibility with maize and fruit cultures. But they have the disadvantage that they do not destroy all the weeds occurring in these crops sufficiently. These unmanaged weeds are rapidly spreading without further weed competition, and are nullifying the initial success of herbicide treatment. In order to achieve sufficient control success against the large number of weeds in maize crops when the triazine derivatives are used alone, it is generally necessary to use doses which do not permit replication of other crops or only with great risk. Dichloroalurea can also be used to control monocotyledonous and dicotyledonous weeds in maize crops. However, this application rates are required, which move relative to the crops in the phytotoxic area. In addition, a number of combinations with triazine active ingredients are protected in various fields of application using different combination partners, of which only those of the combination according to the invention are to be mentioned close to active ingredient mixtures. Thus, DD-PS 143198 a combination of substituted thioureas and mono- or Dichloralhamstoff protected. However, this combination has the disadvantage that the application is limited to the pre-emergence method in contrast to the combination according to the invention. In addition, the use of a substituted thiourea is required, which represents an economic obstacle due to its difficult technical accessibility. DD-PS 122773 describes the utility of a combination with a triazine-based drug and N, N-dimethyl-N-phenylurea in maize crops. Disadvantages of this technical solution are gaps in the spectrum of action. For example, weeds are poorly controlled, although these are among the problem weeds. DD-PS 127264 describes a combination of a triazine active ingredient and N-methyl-N-phenylurea. The disadvantage of this combination is also in the aforementioned gap in the action, but also in toxicological problems of the substituted urea used. DD-PS 155801 protects the use of substituted thioureas and triazines together with substituted acetanilides. Although these combinations have the same range of action as the compound mixtures according to the invention, their decisive disadvantage is that their application is limited only to the pre-emergence period of the crop plants, since the post-emergence application leads to phytotoxic phenomena on the crop plants. Object of the invention The aim of the invention is to develop by combining herbicidal active ingredients new herbicidal agents that allow for low 'application rates improved weed control in maize and fruit crops, have an optimal spectrum of action, especially weeds and dicotyledonous weeds detect, do not disturb the growth of crops , Do not harm offspring and economically meet the requirements of the national economy. Explanation of the essence of the invention It has now been found that herbicidal agents, the compounds of the formula _: / Cl
H