CS202480B1 - Regulator of the plants growth - Google Patents

Description

The present invention relates to a novel plant growth regulator. To increase agricultural production, in addition to new and more powerful varieties of useful plants, pesticides are used to eliminate the effects of various harmful agents. Plant growth regulators, which affect the growth of economically important plant parts, are used to a lesser extent. Most growth regulators are sioe applied to plants in very small quantities, but their production is generally very expensive. Therefore, attention is paid to substances which have advantageous regulatory or stimulatory effects and are more easily obtained by known methods. Advantageous stimulatory effects have now been shown for 2-sulfobutan-1,4-dlic acid esters.

SUMMARY OF THE INVENTION The present invention relates to a plant growth regulator characterized in that it contains salts of 2-sulfobutane-1,4-dioic acid diesters of formula I, α-ω-co-R®®.

CH-COO-R SO2 wherein R is a linear or branched chain alkyl containing from one to twenty carbon atoms, an cycloalkyl of five to ten carbon atoms, M is a monovalent or divalent cation such as sodium, potassium, ammonium or calcium and magnesium, whereby a value of one or two ·

The active compounds according to the invention can be formulated as powders or solutions,

202 480

202 480, which may also contain wettability adjusting agents for plants, pH stabilizers, adhesion promoters will disappear to plants. The mixtures before application can be silenced or dissolved in water 81 of other polar solvents, or they can be mixed with solutions, emulsions 81 pesticide suspensions 81 liquid fertilizers and sprayed on the surface of the plant in the form of a spraying agent ·

The stimulatory effects of the compounds of the present invention were determined by the following test.

Example 1

Approximately 30 seeds of radish (Raphanus satlvus) of the Saxa I variety were planted with 30 x 20 x 5 cm boxes filled with garden soil. leaves sprayed with aqueous solutions of sodium salts of 2-eulfobutyl-1,4-dioic acid esters at doses corresponding to 5} 2.5) 1.25) 0.65 kg of active substance per hectare, After four days of growth with an average temperature of 20-25 ° C, at 100% relative humidity η with a lighting time of 14 hours / day, the trials were evaluated ·

At a concentration corresponding to 5.0 kg / ha a strong growth retardation was observed and at 0.65 kg / ha the effect of the substances present was no longer present. 2-Chloroethyl-trimethyl ammonium chloride (000 - Setaoel) was used as a standard substance with similar effect , Table 1 shows the relative increases in the overhead part 1 of the bulbs in the control experiment in which the plants were sprayed with distilled water only (control - 100%) ·

Table I

Influence of the dose of the compounds of formula I on the growth of the above-ground parts and bulbs of radishes of the variety Saxa I, dose 2.5 kg / ha_dose 1.25 kg / ha

R above ground 8 · bulvička above ground no · bulvičkn control 100.0 100.0 100.0 100.0 CKj- 74.4 81.6 83.9 79.8 O2H5- 81.2 74.5 73.4 52.4 (CttjJgCH- 80.0 51.8 96.7 74.5 OH ₃ (CH _{2) 3} - 94.6 97.3 99.2 102.4 (CH-PgCHCHg- 93.0 99.0 126.6 145.0 (OHjJgOHÍCHpg- 92.6 94.7 113.5 116.0 O ^ OHCCgHjJOHg- 99.5 93.0 109.0 129.5 GHgíCTg ^ OH- 93.2 96.4 103.5 108.2 οη ₃ (οη ₂₎ ι ₄ οη ₂ - 95.2 97.2 96.2 101.0 92.3 95.4 102.1 109.6 OCC (standard) 81.5 75.3 94.2 99.5

As can be seen from Table I, the dose of 2.5 kg / ha is still quite high. Methyl-, ethyl- and i-propyl derivatives showed significant growth retardation · Growth changes in butyl and higher derivatives can only be detected by accurate plant weighing · At a dose of 1.25 kg / ha, only the first three members of the series exhibit growth retardation. Isobutyl derivative showed the highest growth of bulbs · Growth of green matter increased by 26.6%, but the growth of bulbs increased by 45% compared to control · Iseamyl derivative caused significant increase compared to control plants but not so pronounced · Good stimulation 2-ethylhexyl derivative also has effects

Example 2

The solution containing a mixture of 40% by weight of sodium 2-sulfobutane-1,4-dioic acid dibutyl ester, 5% 1,2-propanediol, 10% ammonium sulphate and 0.05% sodium alginate was diluted with 400 L at a rate of 3 l / ha. water · This dilute solution was sprayed with the mulch (variety Všetatská) in the middle of the vegetation period · The mulch yield increased by 15 to 20% compared to the control crop not treated with the above solution ·

Example 3

To a suspension of 1.6 kg of manganese ethylene bls-dithlokarbamate in 400 l of water, 3 l of a solution containing 50% by weight of the potassium salt of bls-2-ethylhexyl ether of 2-sulfobutane-1,4-dioic acid, 10% 1,4- propaadiol, 0.2% condensate of 4-octylphenol with 7 molecules of exiran (wetting agent) · This mixture was sprayed with potatoes (variety Cirra) at the beginning of flowering · The presence of the substance according to the invention caused a tuber size increase of 15 to 17%

Example 4

The solution of the active ingredient according to Example 2 in a dose of 3 l of concentrate per hectare was used to control the growth of diabetes at the beginning of the last third of the normal vegetation period. 14.7% ·

The examples show that the compounds according to the invention have advantageous regulatory or stimulatory effects and can be used to influence the growth of economically important plant parts.

Claims (1)

Plant growth regulator, characterized in that it contains 2-sulfobutane-1,4-dioic acid diesters of the formula I as active substance, CHg - CO - O - R CH - CO - O - R (I) n ^{+ + n} wherein R is a straight or branched chain alkyl of one to twenty carbon atoms or a cycloalkyl of five to ten carbon atoms and M is one- or a divalent cation, such as sodium, potassium or ammonium cations, or calcium or magnesium cations, the value being one or two;