Plant protecting and regulating compositions – Plant growth regulating compositions – Plural active ingredients
Patent
1995-06-22
1998-04-21
Robinson, Allen J.
Plant protecting and regulating compositions
Plant growth regulating compositions
Plural active ingredients
504168, 504171, A01N 4364, A01N 4710
Patent
active
057417555
DESCRIPTION:
BRIEF SUMMARY
This application is a 371 of PCT/RU93/00211, filed Sep. 2, 1993.
FIELD OF UTILITY
The instant application is related to agriculture, specifically to chemical agents for plant protection and eradication of undesired vegetation.
BACKGROUND OF THE INVENTION
Derivatives of sulfonylurea of general formula ##STR1## wherein R.sub.1 =Cl, COOCH.sub.3, OCH.sub.2 CH.sub.2 Cl and R.sub.2 =H,
All herbicides of the sulfonylurea series have considerable advantage compared to other herbicides because of the low dosage (8-50 g/ha of active principle) and high selectivity, although their low degradation rate in soil causes detrimental effects in crop rotation as well as resistance in a number of weeds. Accidental over-dosage of these herbicides can result in serious phytotoxicity for certain cereals.
All known herbicidal compositions based on sulfonylurea are wettable powders or microgranules. The absence of water-soluble preparations in these series is explainable by low water-solubility of sulfonylurea and their relatively high hydrolysis rate.
The use of 2-methoxy-3,6-dichlorobenzoic acid and its salts as herbicides to control weeds in cereals by application of 150 g/ha of the active this herbicide is the complete absence of resistance to it in weeds. Nevertheless the relatively high dosage of the preparation and rather narrow spectrum of activity is a disadvantage.
Increasing of the herbicidal activity of 2-methoxy-3,6-dichlorobenzoic acid and lowering its dosage as well as elimination of disadvantages inherent to known herbicides of benzenesulfonylurea series poses a problem of creation of herbicidal composition with low dosage and wide activity spectrum, absence of detrimental effects on crop rotation and phytotoxicity in crops to be protected, and not leading to development of resistance in weeds.
The most advantageous solution of this problem is a composition for control of undesired vegetation comprising a mixture based on benzenesulfonylurea derivative ##STR2## and 2-methoxy-3,6-dichlorobenzoic acid with the addition of surfactant,
A method for control of undesired vegetation in cereals is known. It comprises the application of emulsion or suspension of the aforementioned herbicidal composition on basis of benzenesulfonylurea derivative and 2-methoxy-3,6-dichlorobenzoic acid with addition of a surfactant, organic solvent and water. The application dosage to weeds is 3 kg/ha. No exact examples describing the components of the composition and method of its application are disclosed.
DETAILED DESCRIPTION OF THE INVENTION
The instant invention discloses a herbicidal composition for use in cereals, comprising ammonium salts of benzenesulfonylureas of general formula (I) ##STR3## wherein: R.sub.1 =Cl, COOCH.sub.3 or OCH.sub.2 CH.sub.2 Cl; general formula (II) ##STR4## wherein: R.sub.7 =CH.sub.3 or C.sub.2 H.sub.5 ; percentage of components:
______________________________________ ammonium salt of benzenesulfonylurea derivative
2,0-50
ammonium salt of 2-methoxy-3,6-dichlorobenzoic acid
5,0-50
surfactant 1,0-5,0
organic solvent 10-40
water up to 100.
______________________________________
As surfactants the following agents are applicable: bis-polyoxyethylated alkylamine, sodium bis(2-ethylhexyl)succinate sulfonate, polyethyleneglycol monoalkyl ethers or alkylaryl ethers of polyethyleneglycol or polypropyleneglycol.
Triethyleneglycol is used as organic solvent. A method for control of undesired vegetation in cereals comprises applying to the locus to be protected a herbicidal composition based on derivative of benzenesulfonylurea, 2-methoxy-3,6-dichlorobenzoic acid with addition of surfactant, organic solvent and water is characterized in that benzenesulfonylurea derivative and 2-methoxy-3,6-dichlorobenzoic acid are employed in the form of their ammonium salts with the respective general formulas (I) and (II) ##STR5## wherein: R.sub.1 =Cl, CCOCH.sub.3 or OCH.sub.2 CH.sub.2 Cl; ##STR6## wherein: R.sub.7 =CH.sub.3 or C.sub.2 H.sub.5 ;
______________________________________ ammonium salt of benzen
Kare Ltd.
Robinson Allen J.
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