JPH074A - Seed labeled with rare earth - Google Patents

Abstract

PURPOSE: To provide seeds having a peculiar management possibility which is extremely improved compared with the ones now available on the market by mixing rare earths. CONSTITUTION: The combination of at least two kinds of rare earths with extremely different density ratios compared with the density ratios which are naturally found in soil is contained in the seeding-processed natural or artificial seeds for the portion of a non-plant toxicity labeling quantity which is detected by analysis.

Description

Detailed Description of the Invention

[0001]

FIELD OF THE INVENTION The present invention relates to rare earth labeled seeds,
It relates to the acquisition method and usage method.

[0002]

BACKGROUND OF THE INVENTION There is growing interest in quality in the field of seed commercialization, and new means for controlling quality and origin are needed. Certainly there are already means to control the quality or appearance of the coating or dressing process, or to use a microscope, but these are the same if seeds from different sources are treated with the same species. Would be insufficient for. In addition, defects may appear in commercial seeds during and after sowing during use, and the manufacturer can find the lot number in question, promptly address the claim, investigate the cause of the defect, and remedy it. is important.

Therefore, it is an object of the present invention to provide seeds with rare earth incorporation which have significantly improved inherent manageability over commercially available seeds.

[0004]

SUMMARY OF THE INVENTION Accordingly, the present invention comprises a treated natural species for seeding characterized in that it contains a combination of at least two rare earths in markedly different concentration ratios with a non-phytotoxic label amount detectable by analysis. Or, it concerns artificial seeds.

In the present invention, "rare earth" means lanthanum,
Means yttrium or lanthanide series elements. Preferably a rare earth selected from the group consisting of neodymium, terbium, europium, lanthanum, samarium, lutetium and ytterbium is used for reasons of lack of phytotoxicity and / or ease of detection.

Suitable examples include binary and ternary combinations of each of these rare earths (eg neodymium /
Lutetium / europium, lanthanum / terbium / samarium, ytterbium / terbium / samarium and lanthanum / samarium / ytterbium combinations).

A combination of four or more kinds of rare earths can be used, but if many rare earths are used, a problem naturally occurs due to the cost of measurement.

The expression "significantly different" as used in the present invention means that the concentration ratio is at least twice, preferably 2 to 100 times the concentration ratio naturally found in soil.

The term "non-phytotoxic" as used in the present invention means an amount that does not destroy seeds and produce no germination inhibiting effect.

The amount of each rare earth metal is generally from 0.1 to 1000 ppm of seed weight, more specifically from 0.1 to 10 ppm.
It is 0 ppm.

The seeds of the present invention may be in the form of natural or artificial seeds, and more generally any plant propagation means such as somatic embryos or explants. Seeds falling within this definition are diverse and include, for example, major crops (eg cereals, corn, sunflower, peas, cotton, rapeseed, soybeans), vegetables and flowers, as well as tree plant species.

The present invention further relates to the above method for obtaining seeds, characterized in that the seeds are treated with a composition containing a rare earth. The treating composition can take various forms, such as slurries, powders, coating formulations,
It can be a dressing treatment formulation or a pre-emergence treatment composition.

The treatment composition preferably further comprises at least one pesticidally active substance. Especially with pesticide substances,
It means an insecticidal, fungicidal or growth regulating active substance.

Any known equipment and techniques for treating seeds with the composition as described above may be used to apply the composition, for example using a coating or dressing treatment turbine. Alternatively, a fluidized bed coating method may be used, or other continuous processing method of transferring seeds within the channel, for example by a screw in the form of a brush.

The present invention further provides a method for identifying a seed treatment source and a treatment date, which comprises a step of adding at least one rare earth element to seeds as a first step and a step of analyzing rare earth elements in a seed residue. Pertain. The analysis is preferably carried out after sowing, especially after germination of the seed.

The analysis of the rare earth content in the seed is carried out by any suitable method, in particular by neutron activation. This known nuclear method (Serge May monograph, "Tech
requests de l'ingenieur ",
p. 2565, Vol. 1, 1986) is based on the identification and quantification by γ-spectrometry of radioactive elements formed by the neutron capture reaction (neutron activation) from the test element in the sample to be analyzed. Its characteristics are that the sample does not need to be chemically prepared (direct analysis) and that it has high sensitivity.

The samples are prepared by separating the seeds or seed residues from the roots and aerial parts of the plants and then collecting and weighing them in polyethylene irradiation flasks. The flask thus prepared was combined with a flask containing samples of the elemental standard to be analyzed (standard solution aliquot) and international standard soil (reference: soil 7, provided by IAEA) and the corresponding cultivated soil, and the irradiation shuttle was set. Form. The shuttle was then sent to the Orphee reactor at the Nuclear Research Center in Saclay (France), 4x1
Irradiate with a thermal neutron flow of 0 ¹³ neutrons / cm ² for 7 hours.

Radioisotope analysis is conducted by Canberra F
Performed by high resolution gamma spectrometry (18% efficient GeHP detector) using DGBAMMA spectrometry software developed by Rance. The sample cooling time from removal from the reactor to counting depends on the half-life of the radioisotope analyzed,
7 days for lanthanum and samarium, 15 days for neodymium, europium, terbium, ytterbium and lutetium.

The crude result of the radioactive element analyzed by the seed (activity expressed in becquerel) is then expressed as the mass concentration of the corresponding element in comparison with the simultaneously irradiated standard. To distinguish between labeled and unlabeled seeds, the ratios of the two or three rare earths selected as the discriminating means are investigated and these ratios are compared to the theoretical ratio introduced into the seed and the ratio in the reference soil.

The present invention will be specifically described below with reference to examples.

[0021]

EXAMPLES Example 1 0.1 g of sodium carboxymethyl cellulose, 0.09 g of a red dye having a color index of Red 112, oxine-copper (mold fungicide) (150 g / kg) per 1 kg of seeds.
l) and anthraquinone (crow repellent) (250 g /
2 ml of a multi-part Germanate commercial formulation based on the mixture of l), 0.005 g La ₂ O ₃ , Tb ₄ O ₇
1 kg of seeds with an aqueous slurry having a composition of 0.001 g
By using at a rate of 12 ml per
1 kg of wheat seeds was treated for 20 seconds in a HEGE 11 rotating disc ball with kg.

The treated and untreated seeds were sown in the field. About the uncultivated unlabeled seed, uncultivated labeled seed, unlabeled seed after 4 weeks cultivation, and labeled seed after 4 weeks cultivation after collecting the sample 4 weeks after cultivating the labeled seed and the unlabeled seed The rare earth concentration ratios were compared with each other.

The following lanthanum / terbium (La / Tb) weight ratios were observed under these conditions:

[0024]

[Table 1]

Example 2 Cormaison commercial composition TF based on a mixture of 0.2 g of sodium carboxymethylcellulose / kg of seeds, silum (mold fungicide) (320 g / l) and anthraquinone (crow repellent) (200 g / l)
LECO 5ml, imidacloprid (insecticide) 70
% Gaucho commercial composition containing 10% Sm ₂ O ₃
0.00025g, La ₂ O ₃ 0.005g, Tb ₄ O ₇
Seed 1 k of an aqueous slurry having a composition of 0.001 g
Through the addition at a rate of 25 ml per gram, a throughput of 2
1 kg of wheat seeds were treated for 30 seconds in a HEGE 11 rotating disc ball with kg.

The treated seeds were sown in the same manner as in Example 1.
Samples were taken after 8 weeks of cultivating labeled and unlabeled seeds, respectively. The rare earth concentration ratio was measured in the same manner as in Example 1.

Under these conditions, samarium /
A weight ratio between the lanthanum / terbium (Sm / La / Tb) components was observed.

[0028]

[Table 2]

As is clear from the above results, the rare earth concentration ratio is maintained satisfactorily from the time of introduction of the rare earth combination to the time of measurement, and the combination of the ratios of the same rare earth in the soil and the ratio remarkably different from each other are selected. By
The desired tracing effect is secured.

Claims (24)

[Claims] 1. A seeding treatment, characterized in that it contains a combination of at least two rare earths with a concentration ratio remarkably different from the concentration ratio naturally found in soil, and a non-phytotoxic marker amount detectable by analysis. Natural or artificial seeds. 2. The concentration ratio is at least twice the concentration ratio naturally found in soil.
Seed described in. 3. The seed according to claim 2, wherein the concentration ratio is 2 to 100 times the concentration ratio naturally found in soil. 4. The seed according to claim 1, which contains two kinds of rare earth elements. 5. The seed according to any one of claims 1 to 3, which contains three kinds of rare earth elements. 6. The seed according to claim 1, wherein the rare earth element is selected from the group consisting of neodymium, terbium, europium, lanthanum, samarium, lutetium, yttrium and ytterbium. . 7. The amount of rare earth, expressed as the weight of metal relative to the seed, is 0.1 to 1000 ppm, preferably 0.1 to 1.
It is 00 ppm, The seed as described in any one of Claim 1 to 6 characterized by the above-mentioned. 8. The seed according to claim 1, wherein the treatment is a treatment with a slurry or a powder. 9. The seed according to claim 1, wherein the treatment is coating. 10. The seed according to claim 1, wherein the treatment is dressing treatment. 11. The seed according to claim 1, wherein the treatment is pre-emergence treatment. 12. The seed according to any one of claims 1 to 11, which is a cereal seed. 13. The seed according to claim 1, which is a corn seed. 14. The seed according to any one of claims 1 to 11, which is a sunflower seed. 15. A plant obtained by germination or propagation of the seed according to any one of claims 1 to 10. 16. The seeds are treated with a slurry, a powder, a coating formulation, a dressing formulation or a pre-emergence formulation containing a combination of at least two rare earths. The method for obtaining seeds according to any one of 1. 17. The method according to claim 16, wherein the formulation further comprises at least one agrochemical active substance. 18. A source of treated natural or artificial seeds for sowing comprising the steps of adding to the seeds a combination of at least two rare earths and analyzing the concentration ratio of these rare earths in the seed residue. How to identify the treatment date. 19. The method according to claim 18, characterized in that the analysis is carried out after germination of the seeds. 20. The method according to claim 18, characterized in that the seed is sown between the treatment and the analysis. 21. The method according to claim 18, wherein two rare earth elements are added. 22. The method according to claim 18, wherein 3 kinds of rare earths are added. 23. A seeding treatment, characterized in that it contains a combination of at least two rare earths with a concentration ratio remarkably different from the concentration ratio naturally found in soil, and a non-phytotoxic marker amount detectable by analysis. A composition for treating natural or artificial seeds. 24. The composition according to claim 23, further comprising at least one agrochemical active substance.