Method of killing undesirable plants

专利摘要:

公开号:SU882402A3
申请号:SU792785403
申请日:1979-07-03
公开日:1981-11-15
发明作者:Бук Вольфганг；Зеринг Рихард；Линден Герберт；Луст Зигмунд
申请人:Целамерк Гмбх Унд Ко. Кг (Фирма)；
IPC主号:

专利说明:

(54) METHOD OF FIGHTING AGAINST UNDESIRABLE The invention relates to chemical methods of controlling undesirable vegetation by treating it or the soil on which it grows with herbicides derived from diphenyl ether. Known methods of combating unwanted vegetation, in which as herbicides using derivatives of diphenyl ether. These include, for example, the method using the herbicide NITROPHEN-2, 4-dichloro-4-nitrodiphenyl ether 1. The latter is widely used both individually and mixed with other herbicides. However, the effectiveness of the known Orozobov of combating undesirable plants with the help of derivatives of diphenyl ether is not always satisfactory. The aim of the invention is a method of controlling undesirable vegetation using herbicides based on diphenyl ether derivatives, characterized by a higher efficacy against weed plants PACT NEEDLE and better selectivity for cultivated plants. This goal is achieved by using the derivatives of the diphenyl ether of the general formula dl, NB where R is hydrogen, fluorine, chlorine, methyl, methoxy; R is hydrogen, alkyl with 1-3 carbon atoms; 2-hydroxyethyl, trifluoroacetyl; R is hydrogen, methyl; X is oxygen or sulfur, 0.14 kg / Pa; Forms of using a compound of general formula I are ordinary: solutions, pastes, powders, emulsions, etc .; they are prepared by known methods. Methods for preparing the compound of general formula I are based on known reactions. They are obtained, for example, by reacting a substituted phenol or thiophenol with 2,3-dichloro-b-nitroaniline, having the appropriate substituents at the nitrogen atom, at 20-120 ° C in the presence of a hydrogen chloride acceptor or in the absence of the latter in the case of phenol or thiophenol that The reactions are carried out in an environment of organic solvents, for example acetonitrile, dimethylformamide, di methylsulfoxide, etc.
In talb. 1 shows the compounds of general formula I studied as a herbicide and examples illustrating the effectiveness of the proposed method.
Example. To illustrate the proposed method, plastic containers with a capacity of 300 cm, containing clay sand and 1.5% of humus, are used. The seeds of the experimental plants are sown separately by class. In the case of pre-emergence / treatment, immediately after seeding, herbicides are applied to the soil surface. In this case, the herbicides are applied in the form of an aqueous preparation, which is sprayed onto the soil potion with the help of a nozzle. After applying the drug, the vessels are watered to cause germination and growth of plants and at the same time activate the active substances. The vessels are then covered with a transparent plastic film until the plants start to grow. In the post-emergence treatment, the plants are allowed to grow to a height of 5 seconds and then treated. The pots are left standing in the greenhouse. The experiments were carried out at 21–22 ° C and 80–85% air humidity for 4 weeks. The amount of herbicide in kg / ha is then required for 100% weed control, as well as the extent of damage to the beneficial plants for a given amount of herbicide. The degree of damage to beneficial plants is assessed on a scale of 0-100 (O means no damage, and 100 means total damage, i.e., destruction).
Herbicides, their quantity (kg / ha), necessary for complete destruction of plants, and the degree of damage to useful plants are presented in Table. 2
Table
0.8 0.9
Table 2
oh oh
Oh oh
Oh oh
10 10
Dovsho0, 5 dova
Poslevskhodo0, 4
wa
Dovsho0, 7 dova 1
Post-emergence
The post-emergence claims of the invention. The method of controlling undesirable propagation by treating plants or the soil on which they grow with a diphenyl ether derivative herbicide, is characterized in that, in order to increase the efficiency of the process, a compound of the general formula is used as a derivative of diphenyl ether. ii,
Continued table. 2
1.25 0.9 1.25 O
0.3 / 0.6 O
Oh oh
ABOUT
1.25 1.25 1.25 000
O O 1 0.6 4 10 O 10
15
15
20
ten
thirty
thirty
50
40 g: pr to R - hydrogen, fluorine, chlorine, methyl, methoxy; R is hydrogen, alkyl with 1-3 carbon atoms; 2-hydroxyethyl, trifluoroacetyl; R2 is hydrogen, methyl; X - oxygen or sulfur, 0.14 kg / ha. Sources of information taken into account in the examination 1. Japanese patent 9305, 30 F 37 I. 216, published. 1969.

权利要求:
Claims (1)
[1]
Claim
A method for controlling undesirable vegetation by treating plants or the soil on which they grow with a diphenyl ether derivative herbicide, characterized in that, in order to increase the efficiency of the method, a compound of the general formula is used as a diphenyl ether derivative
Y ^ NR * R * where R is hydrogen, fluoro, chloro, methyl, _f methoxy;
R is hydrogen, alkyl with 1-3 carbon atoms; 2-hydroxyethyl, trifluoroacetyl;
R ² is hydrogen, methyl;
X is oxygen or sulfur, 0.14 kg / ha.

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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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DE19782831262|DE2831262A1|1978-07-15|1978-07-15|2-CHLORINE-6-NITROANILINE|

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