Method of controlling undesirable vegetation

专利摘要:
This invention relates to chemical methods for controlling undesirable vegetation. The essence of the invention is the use of the pyridinecarboxylic acid derivative of the general formula as active substances.
公开号:SU1356950A3
申请号:SU813424175
申请日:1981-11-20
公开日:1987-11-30
发明作者:Колин Крэмп Микаэль；Глимор Джеймс；Вильям Парнелл Эдгар
申请人:Мэй Энд Бейкер Лимитед (Фирма)；
IPC主号:

专利说明:

This invention relates to chemical methods of controlling weeds and undesirable vegetation.
The aim of the invention is to enhance the herbicidal effect of a method for the destruction of undesirable vegetation based on the use of
derivatives of pyrIDINCARBON ACIDS
Below are the active substances used. in the proposed method, and examples illustrating the effectiveness of this method.
The active substances presented in Table 1 can be obtained by various methods for the synthesis of pyridinecarboxylic acid amides, for example, from the corresponding amines and nicotinic acid chloride.
Preparation of 4-fluoroanilide 2- (metrifluoromethylphenoxy) nicotinic acid (.compound 1) o
 To a mixture of 68 g of 2- (meta-trifluoromethylphenoxy) nicotinic acid and 400 MP of toluene, 28.6 g of thionyl chloride was added with stirring over 5 minutes. The mixture is heated for 18 hours in a water bath, cooled to 30 ° C and evaporated under reduced pressure. The residue is dissolved in 400 m of toluene and 48.6 g of triethylamine are treated with stirring at room temperature. After that, 26.2 g of 4-fluoroaniline are added, the mixture is heated for 5 hours in a water bath, evaporated under reduced pressure, and the residue is triturated with 250 ml of water. The aqueous portion is extracted twice with 250 MP of methylene chloride, the extract is washed with water (150 mp). dried over sodium sulfate; evaporated under reduced pressure; the solid obtained is recrystallized from 850 ml of a toluene-hexane mixture (1: 9). and get the final product with T.rai. 3 - 32 ° C.
In a similar way, receive and other active substances, presented in table.1 o
Pre-emergence treatment
Seeds of experimental plants are sown in prepared soil (7 rpm, h, fresh sterilized soil, 3 rpm, h, rt and 2 rd, cho sand) and immediately thereafter treated with acetone solutions of the active substances. The seeds are covered with a layer of soft sand (25 mm) and the pots with experimental plants are kept in greenhouse conditions for 19-28 days. After that, the effectiveness of each compound is determined, expressing it in a minimum dose (kg / ha) sufficient for destroy 90% of plants. The controls are untreated plants. The results of the experiments are presented in Table 2: Compound numbers correspond to tabLo1,
Post-harvest processing. Experimental plants grown under greenhouse conditions up to a certain stage of development (1-6 leaves depending on the species) are treated with acetone solutions of active substances and continue their cultivation under greenhouse conditions. The potency of the compounds is determined by the analogue of Example 2.
The results of the experiments are presented in table 3,
Comparative experience, general knowledge,
The appropriate amounts of the test compounds - (2,4-difluorophenyl) -2- (3-trifluoromethylphenoxy) - nicotinamide (compound 3) and 3,6-dichloropicolinic acid (compound A) were dissolved in acetone in order to obtain solutions, equivalent doses of 125, 250, 500, 1000, 2000, 4000 and 8000 g of the test compound per hectare. These solutions were used using: a fan spray on a platform moving at a speed of 1.6 m / min (2.6 km / h), a spread of the equivalent of 540 liters of fluid per hectare.
Weed control (use until germination),
Weed seeds were sown on a compost surface for seedlings such as John Innz (7 rpm, sterilized
mixtures of clay, sand and humus, 3 rpm, h. peat and 2 vol. h, finely ground gravel) contained in square plastic pots with a side of 7 cm. Number of seeds per
a pot of 25 - 30 pcs.
The test compounds were applied as described above in doses equivalent to 125, 250, 500, 1000, 2000, 4000 and 8000 g of the test compound per hectare, and then the seeds were covered with 25 mm of fine sand. We used one pot of each type of weed subjected to each treatment, along with untreated controls.
mi plants and control plants that were treated only with acetone. After treatment, the pots were kept in a greenhouse and watered on top in accordance with the regulations 24 hours after the treatment. A visual analysis of the reduction in weed growth in the treated pots compared to untreated control plants and plants that were treated only with acetone was carried out on the 20th day after the treatment. The response curve for each dose was constructed for each compound and for each type of weed using linear regression, and then using the dose-response curve, we calculated the dose to be applied in order to get a 90% reduction in the growth of each type of weed. ka (AU 90). Where the highest dose of the test compound did not give a 90% reduction in the growth of weeds, the value of AU 90 was determined with an extrapolation aid from the response curve to dose
The results are presented in Table A.
Destruction of weeds (use after emergence of shoots) ,,
Shredded various types of weeds, and then transferred to the seedling stage in the compost for seedlings of the species John Innz No. 1, contained in square plastic pots with a side of 7 cm, except for oats, which were planted directly into the pots for seedlings without subsequent transfer. Next, the plants were grown in a greenhouse until they were ready for treatment with the test compounds (broadleaf weeds with 3-6 leaves, grass 1-3 leaves).
The test compounds were applied in doses equivalent to 125, 250, 500, 1000, 2000, 4000 and 8000 g of the test compound per hectare. One pot for each type of weed was treated with all doses, in addition, untreated control plants and control plants that were treated only with acetone were studied. After processing, the pots on top were watered with water, starting from 24 hours after processing. Analysis of the effects of herbicides on weed growth
ten
15
20
25
 ,
thirty
carried out on the 20th day after treatment, fixing the number of plants that died and that were delayed with growth. Then, the dose of the preparation to be applied in order to obtain a 90% reduction in growth or weed death was determined by comparing the treated plants with the plants in the control pots (AU 90) -, these calculations were performed as described above. The results are shown in table.5.

权利要求:
Claims (1)
[1]
The presented results show that Compound 3 is 15.7-43.7 times more active when applied before germination and 2.6-118 times more active when applied after germination compared with Compound A when applied against characteristic spectrum of broadleaf weeds and grasses. Invention Formula
A method of controlling undesirable vegetation by treating it or the soil on which it grows is a pyridinecarboxylic acid derivative, characterized in that, in order to enhance the herbicidal effect, a compound of general formula X R, V7 C-N35 is used as a pyridine carboxylic acid derivative
.Oj
to
five
0
five
methyl, ethyl, allyl;
fluorine, chlorine,
where R is hydrogen,
hydrogen, methyl trifluoromethyl;
fluorine, chlorine, bromine, trifluoromethyl, methoxy, cyano, methylsulfonyl, ethylsulfonyl;
chlorine;
chlorine, fluorine;
chlorine, fluorine, cyano,
R. Cs R4
RS R,
0
R-, hydrogen,
hydrogen,
hydrogen,
ethynyl;
hydrogen.
chlorine, fluorine, difluoro; Rg is hydrogen, fluorine, methyl; X is oxygen or sulfur, provided that in the case where; yes X is sulfur, R, R, Ry.R / and R 8 are hydrogen, Rj is fluorine, R-j is chlorine or trifluoromethyl, and RT is hydrogen or ortho-fluorine, in an amount of 0.25–8 kg / ha.
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table 2
17
1356950
0.5
0.5
0.5
0.5
0.5
0.25
one
3
0.5
0.25
0.25
one
0.5
one
0.5
eight
four
four
four
one
eight
four
0.125
four
0.5
0.5
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0.25
2
3
one
0.75
0.5
18 Continued table. 2
Table 3
eight
NR
eight
sixteen
NR
eight
eight
eight
sixteen
eight
four
eight
four
four
sixteen
eight
eight
eight
sixteen
eight
eight
eight
nineteen
12
1356950
20 Continued table. 3
NR
NR
sixteen
2
1356950
22 Continued table. 3

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同族专利:

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公开号 | 公开日

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NZ199006A|1985-07-31|

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PL233901A1|1983-02-14|

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KR830006907A|1983-10-12|

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AT12491T|1985-04-15|

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SG8688G|1988-07-01|

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IE52802B1|1988-03-16|

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BR8107585A|1982-08-17|

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PH18472A|1985-07-18|

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RO87037B|1985-05-31|

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MA19337A1|1982-07-01|

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AR229801A1|1983-11-30|

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PL132171B1|1985-02-28|

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EG15683A|1993-07-30|

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PT74020B|1986-06-02|

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DK513481A|1982-05-22|

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ES8400737A1|1983-11-01|

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ES8401468A1|1983-07-16|

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ES507332A0|1983-07-16|

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IL64220D0|1982-02-28|

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AU7763281A|1982-05-27|

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EP0053011A1|1982-06-02|

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AU557053B2|1986-12-04|

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CA1229612A|1987-11-24|

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JPS57118568A|1982-07-23|

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EP0053011B1|1985-04-03|

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MY8700515A|1987-12-31|

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IE812713L|1982-05-21|

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RO87037A|1985-05-20|

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TR22684A|1988-03-03|

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BG47942A3|1990-10-15|

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GR77297B|1984-09-11|

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RO87038A|1985-05-20|

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RO83101B|1984-02-28|

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OA06956A|1983-07-31|

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DD200969A5|1983-06-29|

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KE3798A|1988-04-29|

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DK171022B1|1996-04-22|

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HU188711B|1986-05-28|

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JPS6126994B2|1986-06-23|

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ES8407025A1|1984-09-01|

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GB2087887B|1984-11-14|

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RO83101A|1984-02-21|

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CS228525B2|1984-05-14|

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ES520104A0|1984-09-01|

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US4618366A|1986-10-21|

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DE3169738D1|1985-05-09|

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IL64220A|1985-06-30|

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PT74020A|1981-12-01|

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KR880001314B1|1988-07-23|

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GB2087887A|1982-06-03|

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ZA818032B|1982-10-27|

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RO87038B|1985-05-31|

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ES515995A0|1983-11-01|

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法律状态:

优先权:

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申请号 | 申请日 | 专利标题

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GB8037372|1980-11-21|

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