RU2147804C1 - Herbicide composition - Google Patents

Abstract

FIELD: agriculture, herbicides. SUBSTANCE: invention describes herbicide composition containing 4-amino-3-methylthio-6-tert.-butyl-1,2,4-triazinone-5 of the formula (I)

and 2-methylthio-4,6-bis-isopropylamino-sym-triazine of the formula (II)

. Composition has additionally glyfosate-N-phosphonomethylglycine of the formula (III)

Description

 The invention relates to the field of agriculture, in particular to chemical agents for controlling weeds and undesirable vegetation, and is a herbicidal composition based on a three-component mixture.

 Known herbicidal compositions based on the herbicide 4-amino-3-methylthio-6-tert.butyl-1,2,4-triazinon-5, which has the brand name Zencor (metribuzin see Chemical means of weed control / Ed. N.M .Zhimunskoy. - M.: Agropromizdat, 1986. - P. 209; Application of elements of the Dutch technology of potato cultivation / Recommendations. Novosibirsk, 1990. - P. 6)). Zenkor is available in the form of a 70% wettable powder and in doses of 1.4-2.1 kg / ha for the preparation intended for processing plantings of potatoes, tomato, soy and other crops. The main drawback of Zenkor is its low herbicidal activity against some dicotyledonous and perennial weeds.

 Also known are herbicidal compositions based on the herbicide 2-methylthio-4,6-bis-isopropylamino-sym-triazine, which has the brand name promethrin (Kravtsov A.A., Golyshin N.M. Preparations for plant protection. - M .: Kolos, Agropromizdat, 1987 .-- S. 349, 354). This preparation is available in the form of a 50% wettable powder and is used to destroy annual weeds in crops of peas, potatoes, soybeans, cotton, parsley, carrots, dill and other cultivated plants. Recommended doses are 3-5 kg / ha per drug. Its main disadvantage is the low death rate of monocotyledonous and perennial weeds.

 In addition to herbicidal compositions based on the above herbicides, roundup herbicidal compositions (nitosorg, oval), the active principle of glyphosate-N-phosphonomethylglycine, are also known. It is available in the form of a 36% aqueous solution and is intended to combat annual and perennial cereals and dicotyledons. The recommended dose of use is 2-3 l / ha for the drug. Its main disadvantage is the insufficient death of monocotyledonous and dicotyledonous perennial weeds (Bezuglov V.G. Use of herbicides in intensive farming. - M.: Rosselkhozizdat, 1981. - 238 p .; Pesticides: Reference book / Martynenko V.I., Promonenkov V. K., Kukalenko S.S. - M .: Agropromizdat, 1992. - P. 368; List of pesticides and agrochemicals permitted for use in the Russian Federation in 1998 - M .: Kolos, 1998. - 236 p.).

 Analogs of the claimed herbicidal composition are compositions containing Zencor and Prometrin (SU 1578864 A1, 1990 and SU 1703017 A1). However, they are not effective against perennial weeds.

 A prototype of the invention is a known herbicidal composition comprising N-3-chloro-4-methoxyphenyl-N'-methyl-N'-methoxyurea (I); 2-methylthio-4,6-diisopropylamino-1,3,5-triazine (II) and 2,2-dioxide-3-isopropyl-2,1,3-benzothiadiazinone (III) - French patent N 2240687, cl. A 01 N 9/02, publ. 1975. This herbicidal composition is characterized by significant shortcomings: the average effect on weeds, as well as a narrow spectrum of action on weeds.

 The technical task of the invention is to eliminate the above disadvantages, that is, enhancing herbicidal activity, expanding the spectrum of action on weeds, increasing potato yields.

и 2-метилтио-4,6-бис-изопропиламино-симм-триазин (прометрин) формулы II

и дополнительно содержащего глифосат-N-фосфонометилглицин (раундап) формулы III

взятых в соотношении по массе I:II:III - (1,0-1,33):(1,33-2,0):(1,33-2,0) соответственно.The problem is achieved by the composition based on the ingredients: 4-amino-3-methylthio-6-tert-butyl-1,2,4-triazinone-5 (Zencor) of the formula I

and 2-methylthio-4,6-bis-isopropylamino-sym-triazine (promethrin) of formula II

and optionally containing glyphosate-N-phosphonomethylglycine (roundup) of formula III

taken in the ratio by weight of I: II: III - (1.0-1.33) :( 1.33-2.0) :( 1.33-2.0), respectively.

 The inventive herbicidal composition differs from the prototype in that it additionally contains a roundup, significantly increasing the effectiveness of action on annual dicotyledonous and monocotyledonous weeds, as well as perennial weeds. The proposed herbicidal composition has properties not arising from the properties of roundup: a wider spectrum of action on weed vegetation and an increase in potato yield by 21%.

 This allows us to conclude that the claimed herbicidal composition has significant differences. The herbicidal composition is used in the form of wettable powders of Zenkor, Promethrin, which when mixed with water form a stable suspension, followed by the addition of a roundup emulsion concentrate. The resulting suspension is applied to the soil surface by spraying 4-5 days before the emergence of potato seedlings followed by incorporation into the soil, for example, light mesh BSN-4 harrows or rotary rotating harrows BRU-0.7.

Example 1. The experiments were carried out on plots with a record area of 50 m ² , the experiment was repeated four times. Accounting for weediness of crops was carried out by the quantitative-weighted method. 4-5 days before the emergence of potato seedlings, individual herbicides and their mixtures were applied in a certain ratio. After 30-40 days, herbicidal activity was taken into account by the number of dead weeds compared to the control (without treatment with herbicides). After weeds were counted in the control, they were removed mechanically.

 The following weeds predominated on potato plantings: unicotyledonous monocotyledonous (gray bristle, green bristle, chicken millet), annual dicotyledonous (highlander bindweed, highlander bird, field mustard, rape, tatar quinoa, shepherd’s common bag) and perennial dicotyledonous (creeper creeper) silver, spurge vine, thistle field). Experiments, counts and observations were carried out in the planting of potatoes of the Nevsky variety. The variance analysis of yield data was carried out according to B.A. Dospekhov (1985).

где E - ожидаемое повреждение гербицидной смесью (A+B) и гербицидом C в составе общей смеси A+B+C, %; X - % повреждений гербицидной смесью A + B при дозе P, кг/га; Y - % повреждений гербицидом C при дозе q, кг/га.The synergy effect was calculated according to the well-known formula (Golby, Weeds, 1967):

where E is the expected damage to the herbicidal mixture (A + B) and herbicide C in the composition of the total mixture A + B + C,%; X -% damage to the herbicidal mixture A + B at a dose of P, kg / ha; Y -% damage by herbicide C at a dose of q, kg / ha.

 If the actual damage is greater than expected, then using a mixture of herbicides A, B and C is synergistic.

 In studies, it was found that in variants with the initial ingredients of the herbicidal composition, the death of weeds against the background of Zenkor was 42.3-55.5%, promethrin was only 22.3-28.6% and roundup was 34.6-52.4% (table . 1).

 In the experiments, synergism was revealed against the background of variants with the proposed herbicidal composition. In this case, the maximum difference between the actual and expected effects with the combined use of the drugs was observed when the ratio of the starting ingredients in the mass parts of Zencor (I): promethrin (II): roundup (III) was (1.0-1.33) :( 1, 33-2.0) :( 1.33-2.0), respectively. When the ratio of the starting ingredients exceeds the limits of the claimed herbicidal composition, there is no synergism (see table. 1). Against the background of the claimed herbicidal composition, the minimum labor costs for caring for potatoes were established: 18-39 times lower than the control without herbicides and 12-16 times compared to the initial ingredients of the herbicidal composition. The yield of tubers in the variants with the claimed herbicidal composition increased by 21%.

 Example 2. When assessing the comparative effectiveness of the claimed herbicidal composition and the prototype - the herbicidal composition of French patent N 2240687, the ingredients were used (see French patent N 2240687, pp. 17-18, example 3) I: N-3-chloro-4- methoxyphenyl-N'-methyl-N'-methoxyurea; II: 2 - methylthio-4,6-diisopropylamino-1,3,5-triazine; III: 2,2-dioxide-3-isopropyl-2,1,3-benzothiadiazinon-4 in the ratio given in French patent N 2240687 (see p. 18). The initial ingredients of the inventive herbicidal composition are: I: 4-amino-3-methylthio-6-tert-butyl-1,2,4-triazinon-5; II: 2-methylthio-4,6-bis-isopropylamino-sym-triazine and III: glyphosate-N-phosphonomethylglycine, taken in the ratio by weight of I: II: III, equal to (1.0-1.33): (1 , 33-2.0) :( 1.33-2.0), respectively.

 With a total dose of herbicidal compositions of 1 kg / ha a.v. the death of weeds of the claimed herbicidal composition was 57.9-66.1%, and with the use of the prototype 1.8-2.0 times lower - only 32.3-37.8% (table. 2). With a total dose of 1.5 kg / ha d. the death of weeds in the embodiment with the claimed herbicidal composition increases to 86.2%, and with the use of French patent N 2240687 only to 52.4% (see table. 2).

 The use of the inventive herbicidal composition based on a three-component mixture has a high herbicidal activity, including against perennial weeds.

 The herbicidal composition we offer reduces the labor costs (per person-day) for potato care by 39 times and provides an increase in its yield by 21%.

Claims (1)

A herbicidal composition containing 4-amino-3-methylthio-6-tert-butyl-1,2,4-triazinono-5 of the formula I as active ingredients

and 2-methylthio-4,6-bis-isopropylamino-sym-triazine of formula II

characterized in that it further comprises glyphosate-N-phosphonomethylglycine of formula III

taken in the ratio by weight of I: II: III = (1.0 - 1.33): (1.33 - 2.0): (1.33 - 2.0), respectively.

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