DD269776A1 - MEANS OF INFLUENCING THE SHEET-ROOT-RIVER IN SUGAR BEETS - Google Patents

Abstract

The invention relates to means for altering the leaf-root ratio of sugar beet. The aim of the invention is to increase the white sugar yield of sugar beet. The invention has for its object to develop 2,4-D derivatives that avoid a 2,4-D "impact" in the leaf, but by gradual 2,4-D release a desired reversal of growth in favor of root formation accomplish. Cellulosic 2,4-dichlorophenoxyacetic acid derivatives which contain conventional extenders or disintegrants and / or surface-active substances and are also formulated or combined with 2,3-dichloroisobutyric acid or other growth regulators and / or phytohormones, fertilizers or crop protection agents are used as compositions according to the invention Substances can be applied.

Description

Field of application of the invention

The invention relates to a means for changing the leaf-root ratio in sugar beets in favor of the beet body. The invention is important for sugar beet cultivation.

Characterization of the known technical solutions

It is known that combinations of 2,3-dichloroisobutyrate with chloro-choline chloride and / or 2,4-dichlorophenoxy-acetic acid (2,4-D) the root-root root-root ratio, ζ. As Betarüben, change in favor of the beet body and thereby yield increases in these crops allow (DD-PS 145880, Int. Cl. ³ A 01 N 37/02). The disadvantage of this combination of active ingredients is primarily that the 2,4-dichlorophenoxy-acetic acid component increases the root-body yield of sugar beets, but at the same time causes epinastic growth of the leaves. This can lead to a reduction of the sucrose content in the beet body (see S.OTTO and G. SCHILLING, Tag.-Ber., Akad. Agricultural Science-Wiss. DDR 231, 65-73 [1985]). Epinasties of the leaves and decreases in sucrose content with the sole use of 2,4-D in sugar beets were also reported by EV LESCENKO and AS OKANENKO, AS (Aktivnost i napravlennost dejstvija sacharozo-sintotazy svekly, Hn .: GRODZINSKOGO, DM: Sovremennye problemy fiziologii i biochemii sacharnoj svekly, Kiev, Naukova Dumka, 87-93 [1981 !!, Sn sugar yield increases were uncertain, despite high root crop yields.

Object of the invention

The aim of the invention is to increase the white sugar yield of sugar beet.

Explanation of the essence of the invention

The invention has for its object to develop 2,4-D derivatives which avoid a 2,4-D "impact" and thus epinastieauslösende excessive 2,4-D concentrations in the leaf, by gradual 2,4-D But accomplish the desired reversal of growth in favor of root formation when eliminating the adverse side effects on the sucrose content.

The object is achieved in that means are applied to the sugar beet plants containing at least one compound of the general formula given below in addition to customary auxiliaries and additives. These are polymeric cellulose 2,4-dichlorophenoxyacetic acid derivatives, referred to below as 2,4-D-P, of the general formula:

CH ₂ OR

in the mean

η β 100 - 1500 R = 1. -H Second -CH ₂ -COO " Third -CO-CH-O

4. -CH ₂ -CO-O- (CH ₂ -CH ₂ -O- _{/ ri} , C0-CH ₂

-0- / θ V-Cl

Cl

1-4

In each case R must be present in the form mentioned under 3 or 4.

The customary auxiliaries and additives contained in the agents according to the invention are, in particular, liquid or solid extenders or diluents and / or surface-active substances. In addition, the compounds of the general formula may be formulated in combination with 2,3-dichloroisobutyric acid (DCiB) or other growth regulators and / or phytohormones, fertilizers or crop protection agents or applied together with such substances. The compositions according to the invention are prepared by mixing the compounds of the general formula with the additives and are then present as solution, emulsion or suspension.

The compositions according to the invention are applied to the aerial parts of the sugar beet plants. The effective period of application is between mid-June and the end of August

 For 2,4-D-P, a 2,4-D application rate of 25-500g / ha is used. In the case of co-use of DCiB in the mixture, the dose is 0.25 to 1 kg / ha DCiB.

embodiments

The invention will be explained in more detail below with reference to two embodiments.

example 1

Viticulture experiment with sugar beets:

The experiments were carried out in Mitscherlichgefäßen, with the following experimental design applied:

Soil / quartz sand mixture (1 kg / 5 kg per vessel with weakly acidic pH, nutrient supply in the form of 2.8g CaHPO ₄ · 2H ₂ 0.1.6g K ₂ SO ₄ , 3g MgSO ₄ · 7H ₂ 0.2ml 5% FeCl ₃ solution, 1 ml of AZ solution (a) to Hoagland, ₃ g of N as NH ₄ NO ₃ and / or KNO ₃ in several separate doses Water supply by daily watering by weight (55% of maximum water capacity) Application was made at the end of July by spraying aqueous solutions on the leaf apparatus and the results obtained are shown in the table below.

Tab.i effect of 2,4-D-P in Vessel test 1983 Root dry mass Sucrose content ⁰ S Total number of leaves per plant variant Sheet rock mass 386 (100) 431 (112) 507 (131) 12,1 8,1 12,7 56 (100) 32 (57) · 40 (71) · Control 2,4-D (100g / ha) 2,4-D-P (100g / ha2,4-D) 222 (100) 181 (82) 198 (89)

* significant compared to control (t-test α £ 0.05

Example 2

Field trials with sugar beets:

The experiments were carried out on a loess site (see Lö 2 65/64, D 6c). The Mittei were sprayed as aqueous solutions (tank mixes) on dry plant stocks, the treatment took place in late July / early August. Each drug variant was tested in a parcel size of 20m ² (harvest plot) in quadruple repetition. Sowing, care and fertilization took place at the agrotechnical favorable dates. The results are shown in Tab.

Tab. 2

Effect of 2 , 4-D-P in field trial 1985 and 1986 on the white sugar yield rel. Sucrose content ⁰ S White sugar yield dt / ha rel. (100) (106,3) · (100) (112,7) » trial year variant Beet yield dt / ha (100) (106,8) · (100) (114,3) · 19.1 19.1 18.8 18.7 81.0 86.1 81.1 97.0 1985 1986 Control 2,4-D-P (100g2,4 control 2,4-D-P 485.9 -D) 518.9 574.9 657.2

significant compared to the control (t-test α S 0.05)

Claims (9)

claims: 1. A composition for influencing the leaf-root ratio in sugar beets, characterized in that they contain, in addition to customary auxiliaries and additives, at least one compound of general formula I, in the CHOIR 400 - 1500 R * 1. - H 2. Composition according to claim 1, characterized in that they contain liquid or solid diluents or diluents and / or surface-active substances. 2.-CHi-COO " j π and n '= 1 to 4, wherein in each case R must be present in the form mentioned under 3 or 4. 3. Composition according to claim 1 and 2, characterized in that one formulates the compounds of general formula I in combination with 2,3-dichloroisobutyric acid or other growth regulators and / or phytohormones, fertilizers or pesticides or applied together with such substances. 4. Composition according to claim 1 to 3, characterized in that in the case of the simultaneous use of DCiB whose application rate is 0.25 to 1 kg / ha. 5. A process for the preparation of the compositions according to one of claims 1 to 3, characterized in that mixing the compounds of general formula I with the additives. 6. The method according to claim 4, characterized in that formulated the agent according to one of claims 1 to 3 as a solution, emulsion or suspension. 7. Use of the agent according to one of claims 1 to 3, characterized in that it is used to increase the white sugar yield of sugar beets. 8. Use according to claim 6, characterized in that applying the agent according to one of claims 1 to 3 between mid-June and the end of August on the aerial parts of the sugar beet plants. 9. Use according to claim 7 and 8, characterized in that the agent according to one of claims 1 to 3 applied as an aqueous solution, suspension or emulsion at application rates of 25 to 500g / ha active ingredient of the general formula I.