Agent to decrease of toxic action of herbicidal 2,4-dichlorophenoxyacetic acid on sunflower

FIELD: agriculture, herbicides.

SUBSTANCE: invention relates to agent for reducing of toxic action of hormonal herbicidal 2,4-dichlorophenoxyacetic acid on sunflower sprouts. Claimed agent contains 2-(2-furil)-1,3-dioxolane of formula I .

EFFECT: herbicide with decreased toxic action on sunflower.

 

The invention relates to agriculture and to the chemistry of biologically active substances, namely biologically active 2-(2-furyl)-1,3-dioxolane of the formula 1

showing property to weaken the toxic effect of the herbicide hormonal action of 2,4-dichlorophenoxyacetic acid on the seedlings of sunflower.

The structure of compound 1 described in literature [Falin's team L.A., Shkrebets A.I., kulenovic VG, Synthesis, UV - and IR-spectra of 2-aryl-(furyl)-1,3-dioxolane // Izvestiya vuzov. Ser. Chemistry and chemical technology. 1973. Vol. 16. No. 9. S].

The prototype property of the connection 1 with antidote activity in relation to the herbicide 2,4-D is 2-(n-aminobenzoylamino)-5-ethyl-1,3,4-thiadiazole of the formula 2 (patent No. 2040898 Antidote herbicide hormonal action of 2,4-dichlorophenoxyacetic acid // Shooters EAST, Isakov LI, Caliga M.I., Litvinova, L.N., Chubenko TI MKI And 01 N 25/32, 43/82, publ. 09.08.95. BI No. 22).

The present invention is the expansion of the range of highly effective tools for reducing toxic effects of the herbicide 2,4-D on sunflower.

This is achieved by the fact that as a means to reduce the toxic effects of the herbicide 2,4-D on the seedlings of sunflower applies the compound of formula 1.

This is achieved by the fact that the as a means to reduce the toxic effects of the herbicide 2,4-D on the seedlings of sunflower applies the compound of formula 1.

2-(2-Furyl)-1,3-dioxolane obtained by interaction of furfural with ethylene glycol in the presence of an acidic catalyst according to the reaction:

[Falin's team L.A., Shkrebets A.I., kulenovic VG Synthesis, UV - and IR-spectra of 2-aryl-(furyl)-1,3-dioxolane // Izvestiya vuzov. Ser. Chemistry and chemical technology. 1973. Vol. 16. No. 9. S].

The compound obtained identified the sum of the data of elemental analysis, IR and PMR spectroscopy.

The invention is illustrated by the following examples.

Example 1.

The study of the antidote activity of 2-(2-furyl)-1,3-dioxolane

Antidote activity of 2-(2-furyl)-1,3-dioxolane was studied in laboratory conditions on sunflower varieties VNIIMK-8883.

The claimed connection 1 and prototype 2-(n-aminobenzoylamino)-5-ethyl-1,3,4-thiadiazole was experienced in the form of solutions with the content of the claimed compounds and the prototype property at concentrations of 10-2-10-5% (by weight).

Sprouted sunflower seeds were subjected to exposure to 2,4-D and drugs. Part of the seeds were treated only with the herbicide (standard of comparison). Served as control seeds treated with water. Further germination was carried out at a temperature of 28°C for 3 days, measured the length of hypocotyl and root of seedlings of sunflower.

Antidote activity center is aligned with the increase in the length of root and hypocotyl of seedlings in the embodiment, the herbicide + antidote in comparison with herbicide option (reference).

Statistical processing of experimental data performed using student's criterion at the level of probability P=0,95. The test results presented in the table.

As follows from the table, the claimed compound 1 reduces the toxicity of 2,4-D for seedlings of sunflower, surpassing the prototype 2.

Connection 1 in the optimal concentration of 10-3% increases the length of the hypocotyl 36.2%, root - 34.1% compared to 2,4-D.

Compound 2 in an optimal concentration of 10-4% increases the length of the hypocotyl 10.3%, root - 31.2% compared to 2,4-D.

Thus, compound 1 shows properties of the antidote and can be used in the practice of agriculture to remove toxic effects of the herbicide 2,4-D in plants and activation of their growth.

Table.

Antidote activity of compounds 1 and 2 to 2,4-D on seedlings of sunflower varieties VNIIMK-8883
MedicationThe length of the hypocotylRoot length
Concentration %mm% to 2,4-D.mm% to 2,4-D.
Control-the 10.1-12,6-
2,4-D 10-35,8-42,69,1-27,8
2,4-D +10-26,7115,510,7117,6
Connection 110-37,9136,212,2134,1
10-46,6113,88,6-5,5
10-56,9118,9to 12.0131,9
2,4-D +10-26,2106,911,2123,1
Connection 110-36,3108,611,7of 128.6
10-46,4110,3to 12.0131,9
10-56,1105,211,4125,3
The differences between the variants are significant at P=0,95

Means for reducing toxic effects of the herbicide 2,4-dichlorophenoxyacetic acid in sunflower, characterized in that as a means of using 2-(2-furyl)-1,3-dioxolane of the formula 1



 

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