DD298471A5 - MEANS OF INFLUENCING THE SHEET-ROOT-RIVER IN SUGAR BEETS - Google Patents

Abstract

The invention relates to a means for influencing the leaf-root ratio in sugar beet. According to the invention, sugar beet plants are applied with agents which contain at least one phenoxyalkanoic acid amide of the general formula I, for example a bisphenoxalkane acid amide or a phenoxyalkane acid anilide, in addition to conventional auxiliaries and additives. In the general formula I R is phenyl, substituted phenyl (eg 4-methoxyphenyl), pyridyl, substituted pyridyl (eg 6-methyl-pyrid-2-yl) or a phenoxyalkanesaeureamidoalkyl moiety of the structure in which n is 2 to 10 and R1 and R2 independently of one another denote H or CH3. The agents according to the invention change the leaf-root ratio in sugar beet in favor of the Ruebenkoerper and are important for increasing the Weiszzuckerertrags for agriculture. Formula {Plant growth regulators; sugar beets; Blade root ratio; Sugar yield increase; Phenoxyalkansaeureamide; Until phenoxyalkansaeureamide; Phenoxyalkansaeureanilide; * *}

Description

For this 1 page formulas

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 prior art

It is known that combinations of 2,3-dichloroisobutyrate with chlorocholine chloride and / or 2,4-dichloro-phenoxyacetic acid (2,4-D) change the leaf root ratio in root crops, eg beets, in favor of the beet body and thereby increase yields enable these crops (DD-PS 145880, Int Cl: ³ : A01N 37/02). The disadvantage of this combination of active ingredients is primarily that the 2,4-dichloro-phenoxyacetic acid component increases the rootstock 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 reductions of sucrose contents with sole use of 2 / -D in sugar beets were also reported by EV LESCENKO and AS OKANENKO (Aktivnost 'i napravlennost dejstvija sacharozosintotazy ν Korneplodach svekly V. Kn .: GRODZINSKOGO, DM: Sovremennye problem- / fiziologii i biochemii sacharnoj svekly, Kiev, Naukova Dumka, 87-931198 jj)

 Thus, the sugar yield increases - despite high root crop yields - were uncertain.

Aim of the Erfingung The Zie! The invention is to increase the white sugar yield of sugar beet.

-2- 298 471 Presentation 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 general formula I in addition to conventional auxiliaries and additives. These are special Phenoxyalkansäureamide, for example, Ris-phenoxyalkansäureamid9 or Phenoxyalkansäureanilide. In the general formula I R is phenyl, substituted phenyl (ζ B. 4-methoxyphenyl), pyridyl, substituted pyridyl (ζ B. 6-methylpyrid-2-yl) or a Phenoxyalkansäureamidoalkylgruppiorung the structure

= <- ^H

CL

in which η is 2 to 10, and R ¹ and R ^{2 are} independently H or CH ₃ .

The customary auxiliaries and additives contained in the compositions according to the invention are, in particular, liquid or solid extenders or diluents and / or surface-active substances.

In addition, the compounds of general formula I may be formulated in combination with 2,3-dichloroisobutyric acid (OCiB) 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 general formula I 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.

Depending on the compounds of the general formula I used, the required expenditure on the active ingredient is between 5 and 1000 g / ha. In the case of combination preparations containing DCiB 0.25 to 1 kg / ha DCiB are used. The active ingredients are used in the form of their formulations or the preparation forms prepared therefrom in a conventional manner, for. B. by casting, spraying or spraying. Suitable application forms are, for example, aqueous solutions, suspensions or emulsions stabilized by customary dispersants, generally from 100 to 600 l / ha. By means of the invention, the leaf-root ratio is influenced in favor of the root body portion and achieved an assimilate distribution in favor of the beet body. The active compounds of the general formula I cause no 2,4-D "impact effect" and no epinasti-inducing excessive 2,4-D concentrations in the leaf when the specific dosage range is observed.

embodiments

The invention will be explained in more detail below with reference to some embodiments, without limiting it afterwards:

example 1

Vessel experiments with sugar beets:

The experiments were carried out in Mitscherlichgefäßen, fdgende experimental design was:

Soil / quartz sand mixture (1 kg / 5 kg) per vessel with weakly acidic pH, nutrient supply in the form of 2.8 g CaHPO ₄ .2H ₂ .1, 6,6 K ₂ SO ₄ , 3 g MgSO ₄ .7H ₂ 0 , 2 ml 5% FeCl ₃ solution, 1 ml AZ solution (a) according to Hoagland, ₃ g N as NH ₄ NO ₃ and / or KNO ₃ in several single doses. Water supply by daily watering by weight (55% of maximum water capacity). The application was made at the end of July by spraying aqueous solutions on the leaf apparatus. The results obtained are shown in the table below.

Tauelle 1

Sugar yield of sugar beet of the variety Ponemo in a pot experiment (application rate / ha calculated on the number of plants (10Vha))

Variant"

total biomass

g / Found.

FM

Total root yield

g / Found.

Sucrose content in the FM ⁰ S.

sugar yield

g / Found.

control 622.2 (100) 306.2 (100) 13.2 40.4 (100) 2,4-D (100g / ha) 610.0 (98) 395.0 (129) » 9.2 » 36.3 (89.9) A (700 g / ha) (99.3) (120) » 13.0 47.8 (118) B (10g / ha) (105.3) (113) 13.8 47.8 (118)

1) Estimated application rate * Assured In t-test versus control (α £ 0.05) A = N, N'-Bl8- (2,4-dlchloro-phenoxyacetyl) -1,2-diamtnoethane B = N .N'-bis-U ^ -dichloro-phenoxyacetyU-ie-diaminohexane FM = fresh mass

Example 2

Field trials with sugar beets:

The experiments were carried out on a loess site (sL4 Lö D58 / 61, D5c3). The agents were sprayed as aqueous solutions (tank mixes) on dry plant stocks, the treatment was carried out in late July / early August. Each drug variant was tested in a parcel size of 20m ² (harvest plot) in quadruple repetition. Sowing, plowing and fertilization took place at the agrotechnical favorable dates. The results are shown in Tab.

Table 2

White sugar yield in sugar beet ponemo in field trial

variant Rootstock net yield dt / ha rel. Sucrose content ⁰ S White sugar yield "dt / ha rel. 100 108.5 * Control A (650 g / ha) 418.2 450.8 100 107.8 19.5 19.7 70.2 76.2

* significant in t-test versus control (a £ 0.05)

1) calculated according to the formula of E. Sommer, Z. Zuckerindustrie, Berlin (West), 8,323-325 (1958)

A = N, N'-bis (2,4-dichloro-phenoxyacetyl) -1,2-diaminoethane

-V-

"φ

LL

Claims (8)

1. An agent for influencing the leaf-root ratio in sugar beets, characterized in that they contain at least one compound of general formula I in addition to customary auxiliaries and additives, wherein in the general formula IR phenyl, substituted phenyl, pyridyl, substituted pyridyl or a phenoxyalkanoic acid amidoalkyl moiety of the structure in which η is 2 to 10, and R ¹ and R ² independently of one another are H or CH ₃ . 2. Composition according to claim 1, characterized in that they contain liquid or solid diluents or diluents and / or surface-active substances. 3. Composition according to claim 1 and 2, characterized in that the compounds of general formula I in combination with 2,3-dichloroisobutyric acid or other growth regulators and / or phytohormones fertilizers or pesticides formulated or applied together with such substances. 4. 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. 5. 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. 6. The use of the agent according to any one of claims 1 to 3, characterized in that it is used to increase the white sugar yield of sugar beets. 7. 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. 8. Use according to claim 6 and 7, 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 5 to 1000g / ha active ingredient of the general formula I.