Herbicide composition for controlling undesirable vegetation in crops of cereals
Describes herbicide composition comprising, in wt.%: diethylethanolamine salt dicamba 28-34, diethylethanolamine salt chlorsulfuron 1.5 to 2.5, propylene glycol 4-10, ethoxylated ether sorbitan 5-15, water to 100%. The technical result is to increase the percentage of destruction of weeds in relation to the control in crops of spring barley. table 2.
The invention relates to chemical means of protection of grain crops from weeds, and in particular to compositions comprising chlorsulfuron and dicamba.
Herbicide compositions comprising these components are known from the literature, as well as from the practice of agriculture (Handbook of pesticides and agrochemicals permitted for use on the territory of the Russian Federation, 2002).
Chlorsulfuron-/N-(4-methyl-6-methoxy-1,3,5-triazinyl-2)-N/-(2-harfe-ylsulphonyl)urea/ has a significant advantage over other herbicides, because it has a very low consumption rates (8-20 g/ha) and high selectivity. The low rate of decomposition in the soil provides long-term protection of crops from weeds, but at the same time, is the reason for limiting rotation when skin is iMovie culture.
Among the known herbicide formulations on the basis of chlorsulfuron known wettable powders and microspheres (U.S. Pat. Of the Russian Federation No. 2147179), aqueous suspensions stabilized salts of organic and inorganic acids (U.S. Pat. U.S. No. 4936900), aqueous suspension, stabilized by surfactants (U.S. Pat. U.S. No. 5707926), water-dispersible and water-soluble granules (U.S. Pat. U.S. No. 5441923).
Known herbicide composition comprising chlorsulfuron, with the aim of obtaining a water-soluble form contains monoethanolamine or diethylethanolamine, and triethylene glycol as antifreeze (U.S. Pat. RF 1394507).
It is known the use of dicamba - /2-methoxy-3,6-dichlorobenzene acid and its salts as a herbicide for weed control in cereal crops with a rate of 150 g/ha according to the current matter. The advantage of this herbicide is the complete lack of resistance in weeds. However, the relatively high rate of consumption of this drug, and quite narrow spectrum of action on the weeds significantly reduces this positive property.
To enhance herbicide action dicamba with simultaneous reduction of its consumption norms, as well as to eliminate the drawbacks inherent in harsh 2040179, Pat. Of the Russian Federation No. 2106782, Pat. Of the Russian Federation No. 2171578).
Thus, in the patent of Russian Federation №2171578 described herbicide suspoemulsions concentrate containing pre-adsorbed chlorsulfuron on the surface of the charge, consisting of a stabilizer (triethanolamine, sodium, calcium salts alkylbenzenesulfonate, triethanolamine, sodium, calcium salt lauryl sulphate), dispersant (lignosulfonates), media (zeolite, Tripoli, highly dispersed silicon dioxide) and filler (kaolin, chalk, talc), dicamba, emulsifier (ethoxylated higher fatty alcohols, sentenal, ethoxylated ALKYLPHENOLS) and solvent (oil solvent, a mixture of p, oktilovom and danilovogo alcohols normal structure). The invention is directed to enhance the chemical stability of chlorsulfuron. The disadvantages of this structure is the difficulty of obtaining and complexity.
In the patent of Russian Federation №21006782 described herbicide composition comprising diethylethanolamine salt chlorsulfuron and dicamba, ammonium salts of related acids contained in dicamba, ammonia, triethylene glycol and surfactants (polyethylene-glycol monolaurate, sodium-2-ehtilenvinilacetata, dikalova salt of Oct(glycerin-1,3), 2-(2-ethylhexan)amber celetania is a herbicide composition according to U.S. Pat. Of the Russian Federation No. 2040179 containing diethylethanolamine salt dicamba and chlorsulfuron, surfactants (biolocation the bonds alkylamines, sodium bis-(2-ethyl-hexyl)-succinycholine, monoalkyl ether - glycol-based fatty alcohols, alkylacrylate esters of polyethylene or propylene glycol) - derived glycol (for example, triethylene glycol) and water.
These drugs are widely used, but their biological effectiveness can be increased by introducing a part of the preparation of additional components.
The purpose of this invention increase the biological activity of the drug.
This goal is achieved through the use of herbicide composition for controlling undesirable vegetation in crops of cereals, including diethylethanolamine salt dicamba and chlorsulfuron, surfactants, derived glycol and water. At the same time as the derived use glycol propylene glycol, and as the surfactant composition contains ethoxylated ether sorbitan - in the following ratio of components, wt.%:
dicamba (in terms of dicamba) 28-34
chlorsulfuron (recalculated to 100
Ethoxylated ether sorbitan, which surfactant has the properties of bioactivator. Has the following General formula:
where w+x+y+z=20, R-monolaurate, monopalmitate, monostearate, tristearate, monooleate, trioleate (Handbook by Michael and Irene Ash. Handbook of Industrial Surfactants /Third Edition, volum 2, pp 1293-1294-Synapse Information Resources, Inc.
Propylene glycol is a solvent and is capable of lowering the freezing point.
The invention is illustrated by the following examples.
Example 1. The preparation of the herbicide composition
First prepare diethylethanolamine salt dicamba and chlorsulfuron. To do this, in a reactor equipped with a stirrer, load the calculated amount of water and diethylethanolamine, then load dicamba and chlorsulfuron. The mixture is stirred for 20-30 minutes To the resulting solution of salts of dicamba and chlorsulfuron add the calculated quantity of propylene glycol and ethoxylated ether sorbitan. The mass is stirred for 5-7 minutes Data on the compositions shown in table 1.
As ethoxylated ether sorbitan used polyoxyethylene sorbitan monolaurate (C1), polyoxyethylene sorbitan monopalmitate (C2), polyoxyethylene sorbitan the monostearate (C3), polyoxyethylene sorbitan mo is mosambica, soil is heavy clay, humus content - 3,1, pH of 6.7. The tests were carried out on a high background contamination of annual and perennial weeds. Processing was performed in the phase of full tillering culture. During processing plants were in the initial phase of development (annual) and in-phase socket-booting (years).
Preparations were made sprayer technical school-15 (the consumption of the drug 0.17 l/ha solution consumption 150 l/ha). The area of the experimental plots 20 m2the fourfold repetition. The count was conducted 30 days after processing.
Fetotoksicheskoe effects of drugs on weeds noted on the third day after treatment. The results of the biological tests are presented in table 2.
Preparations showed high efficiency in the fight against annual weeds - 92,9-95,0% against the Thistle field of 92.7-95,4%, sow Thistle yellow - 59,9 to 62.8%.
Herbicide composition for controlling undesirable vegetation in crops of cereals, including diethylethanolamine salt chlorsulfuron, diethylethanolamine salt dicamba, surfactant, derived glycol as a solvent and water, characterized in that the derivative g is th ether sorbitan, selected from polyoxyethylene sorbitan of monolaurate, polyoxyethylene sorbitan of monopalmitate, polyoxyethylene sorbitan of monostearate, polyoxyethylene sorbitan of monooleate, in the following ratio of components, wt.%:
Diethylethanolamine salt dicamba (in terms of dicamba) 28 - 34
Diethylethanolamine salt chlorsulfuron (in terms of chlorsulfuron) 1,5 - 2,5
Propylene glycol 4 - 10
The above ethoxylated ether sorbitan 5 - 15
Water To 100
and ammonium salts of 2-methoxy-3,6-dichlorobenzoyl acid(dicamba) formula
R1- CH3or C2H5;
R2- H or CH2CH2OH