DD281538A5 - PLANT GROWTH REGULATOR - Google Patents

Abstract

The invention relates to novel plant growth regulators. According to the invention, diisopropylnaphthalene is used as an active ingredient in the novel plant growth regulators in conjunction with an inert granulated or powdery tracer or in combination with an emulsifier or dismutating agent. The plant growth regulator according to the invention is used for the treatment of seeds, tubers and rhizomes for delaying the germination of the seeds during the storage phase and / or for a faster and strong germination and growth during the growth phase. The diisopropylnaphthalenes can be formulated for application by any method known in the treatment of seeds, plants or the growth medium. {Beneficial effect in storage phase and growth phase}

Description

Field of application of the invention

The invention relates to plant growth regulators. In the field of agricultural chemicals, the term "plant growth regulators" is well known, but is often widely applied to fertilizers, pesticides, fungicides and similar crop treatment agents, as well as crop protection products, which often substantially assure healthy plant growth gorichtet these materials detected with such an extensive concept, but in this ^first description, the term "plant growth regulator" detects materials which regulate by delaying or accelerating the germination of seeds or growth of the plant.

Characteristic of the known state of the art

Plant growth regulators are well known in the art and generally fall into three very different and different groups.

a) Materials for prevention or delay ¹ . the germination of the seeds,

(b) materials to speed up or assist the propagation of the seed and

c) materials for regulating the growth of the plants.

Plant growth regulators for preventing or delaying the germination of seeds are used primarily to store the seeds well until sale or processing. However, most of these shoot-delaying materials have undesirable NeboneffeH on plant growth in this treated seed. Such "side effects" range from delayed germination of the seeds after introduction into the soil or more serious effects, and for example, there are a number of agents that can be used to delay the germination of stored potatoes, which in most countries is However, it is not permitted to use such agents in potatoes intended to be used as seed.

Plant growth regulators to aid seed germination are generally liquids of the gels into which the roots of the germinated seed may grow, however, most of these known plant growth regulators require that the seed remain in the rooting material until good rooting is achieved and then require a manual removal and repositioning to avoid damage to the root system. This method of growing the seed is expensive and can hardly be done on plants that are not quite expensive ornamental plants.

In the relatively small group of plant growth regulators that are applicable to growing herbs, some of these regulators may be applied to the soil but not to the foliage of the plants, while others may be applied to the foliage rather than the soil. Most of these known and currently available plant growth regulators are so expensive that their use in commercially-grown plants has little, if any, economic benefits.

The aim of the invention is the Boreitstellung a plant growth regulator, in various ways for Einsät? in seed, especially tubers and rhizomes, and in growing plants.

Explanation of the essence of the invention

The invention has for its object to find new compounds with the desired properties.

According to the invention, the plant growth regulator according to the invention contains diisopropylnaphthalene.

Diisopropylnaphthalera is a compound well known in the art which is mainly used as a solvent for duplicating inks. What is surprising is that this substance, which until now could not be found in plant tissue in research, has the most advantageous plant growth regulating properties.

The plant growth regulator provided by this invention consists of an isomeric mixture of diisopropylnaphthalenone.

According to one embodiment of the invention, the diisopropylnaphthalene is applied to an inert solid support, which support may be a Feststoffstäub or granules.

The most surprising property of the diisopropylnaphthalenes is that the material itself exhibits nonvolatile properties which would limit its use in koniak applications, while in practical use in granular application and mixing with the seed, it was found that the material did not directly contact the seed influenced with the granules and thus acts in a similar manner as a volatile material.

According to another embodiment of the invention, the diisopropylnaphthalene is combined with a diluent, preferably with an inert viscous material such as polyethylene glycol.

The present invention also relates to a method of treating seed or plants which comprises applying to the seed, the plant or the growth medium for the seed or the plant a diisopropylnaphthalene or an isomeric mixture of diisopropylnaphthalene.

According to a preferred embodiment of the present invention, the diisopropylnaphthalene is applied to inert granulated carriers which are mixed with the seed, or it is distributed to the growth medium for the seed or to the growing plants.

Another method of egg grazing in the context of the invention is that the diisopropylnaphthalene is mixed with an emulsifying agent, diluted with an inert diluent and applied to the seed by dipping or spraying, for example using a so-called ultra-low volume Applicator or applied by a thermal or spray process.

Another method of treating plants in the context of the invention is to apply the diisopropylnaphthalene mixed with an emulsifying agent and diluted with an inert diluent to the plants via a spraying process.

The present invention thus relates to a single material which can be formulated in various ways and applied to seeds or growing plants or to the growth medium. This rogulator may be applied by any known method of application, including impregnation, liquid spray, spray, dust, or by application to granules mixed with the seed or to the growth medium on which the plant grows.

The dosage for the plant growth regulator is between 5 and 200 parts per million, preferably between 10 and 50 parts per million.

exemplary

The invention will now be illustrated by the following examples.

example 1

One liter of diisopropylnaphthalene was mixed with 5 ml of a C / emulsifier, a phosphate ester, to give a 92% solution (mass / vol.) Of ammonia. This formulation was then diluted with water to give a content of 100 parts per million diisopropylnaphthalene. In 100 ml of this diluted solution, 20 pea seeds were dipped for twenty hours. The same number of pea seeds was dipped in pure water for the same time. Both groups of pea seeds were allowed to drain for 30 minutes after dipping before being placed on a Whatman # 4 filter in two petri dishes. Each batch was then covered with a 500 ml und »glass and placed on a warm light O. t, whereby the filter paper received moisture in the form of distilled water. After 14 days, root growth was observed in both the treated and untreated groups with the following result.

Table A

Total root length, mm total / alil d. root

control 1824 treated 5351 % Increase d. treated 193

131 170

Example 2

An emulsifiable concentrate prepared according to Example 1 was diluted with polyethylene glycol to give a 1% (mass / volume) dispersion of diisopropylnaphthalene.

100ml of the dispersion was applied to 50kg of Marie Barci seed potatoes with a standard ultra-low-volume spray applicator mounted on a roller table. The amount corresponded to a dose of 20 parts per million of diisopropylnaphthalene. The treated tubers were stored with a similar quantity of untreated tubers in a controlled environment at 5 ⁰ C10 weeks and then at 7 to 8 ° C over two weeks.

At the end of the twelve-week period, the tubers were examined and the length and number of germinated sprouts noted. The results are shown in Table B.

Table R

Treatment avg. Number avg. length

Germs / tubers of the sprouts

no 3 18.4 mm

D.I.P.N. 4.8 11.3

The treatment significantly increased the number of sprouts and resulted in shorter and firmer growth.

Example 3

900 g of granulated diatomaceous earth having a particle size in the range of 16 to 40 mesh was sprayed with 100 g of diisopropylnaphthalene in a rotary drum to give a uniform distribution of the chemical on the granulated matrix.

10g of the granules were applied to 10 kg potatoes of Culture Record on a pre-germ dish. Five of these bowls were prepared and stored with five bowls of untreated potatoes.

Both quantities were stored at 10 ° C for twelve weeks before measuring the shoot length of 20 tubers obtained from each shell by random selection. The results are as follows.

Table C

Treatment shoot length in mm

Average / tuber

no 97 mm

D.I.P.N. 14 mm

Beliiplel 4

An emulsifiable concentrate prepared as in Example 1 was diluted with water to give a dispersion of 500 mg / l of active ingredient D.I.P.N. to get.

The liquid was then applied to 12 cucumber seedlings until dripping, taking care that the spray liquid did not contact the growth medium, thereby ensuring that the plant applied to the plant was confined to the foliage.

After spraying, the 12 treated plants with 12 untreated plants and 12 water sprayed plants were placed in a growth chamber.

The plants were allowed to grow for 3 weeks, after which the growth medium was washed off the plants. After defrosting for 90 minutes, the plants were weighed, with the results shown in Table D below.

Table D

Treatment avg. avg. avg.

Root mass (g) number of roots leaf

no B 38.7 36.2 7.1

Water 40.1 35.7 7.3

D.I.P.N. 59.5 46.2 9.1

Example 5

An e.T.v. sterilizable concentrate, prepared as in Example 1, was diluted with 200 ml of water and applied to 100 kg of potato seed pie of the Pentland Squire using an ultra-low-volume spray applicator located on a roller table a concentration of 2.5% mass / vol. Diisopropylnaphthalene or 50 parts per million received.

The treated potatoes, and a similar quantity of untreated potatoes were kept in an insulated building at 1O ⁰ C ± 2 ^C C.

On storage, artificial daylight was maintained for two weeks after the treatment, and after four weeks, the tubers were planted in alternate rows.

Treatment was estimated by: time to emerge; Stengel number; Knoll number; Knoll mass and final yield.

The results are listed in Table E.

treated unversed Diff. (%) Days up to 50% accumulation 11 17 54 Average number of stems 5.8 3.9 48 Tuber number 98 days n. A. 18.0 12.5 44 Tuber mass 98 days n. A. 1475 g 825 g 78 Tuber number 136 days. A. 24.5 12.5 96 Tuber mass 136days. A. 1735g 1350 g 28

Note: Number of tubers and mass refers to single plant average n. A. = after emergence

Example β1 kg diisopropylnaphthalene granules were prepared as described in Example 3 and placed in a container containing a

Ton of freshly harvested Portland Squire contained. Room stored at 5 ° C ± 1 ⁰ C for 150 days. After this time, the containers were outsourced and the potatoes sorted. At that time, the treated potatoes had no shoot growth and the tubers were healthy

and firmly. In u'an untreated potatoes, there was about 25% shoot growth up to 75 mm in length. 150 kg of treated

Potatoes and 150kg of untreated potatoes, ranging in size from about 25 to 50mm, were grown Potato pre-germ dishes brought in a lighted. and ventilated storage room another 30 days before planting

stored.

The assessments were made as in the example! 5, and the results are listed in Table F. Table F

treated untreated Diff. (%) Days until 50% accumulation 10 17 70 Number of stems per plant 6.0 3.9 53 Tubers / plant 21.5 11.4 88 Result on marketable tubers 90 days. A. 210g 105g 100 100 days. A. 535 g 35t ¹ g 53

n. A. = after emergence

Example 7

Cucumbers of the variety Telegraph were planted in growth containers after 5 plants had been sprayed with water until dripping with diisopropylnaphthalene. Five similar plants were sprayed with water before planting. During the growth period, the number of flowers formed and the yield of cucumbers was determined. The results are included in Table G.

Table G

handles control

Number of flowers 64 Number of cucumbers 22 Mass of cucumbers {grams) 7924 6712 Examples Freshly harvested Pentland Squire potatoes were treated with 10% (mass / mass) D.I.P.N. granules at a rate of 1 kg

treated per ton and stored in containers of one ton capacity. In a number of containers was one

Comparative treatment of 10% (mass / mass) T.C.N.B. granules. Various untreated containers were added to the Control included. All containers were stored in a frost-free insulated room and kept at 5'C ± 2 ° C. After 26 weeks storage

For example, potatoes treated with D.I.P.N. granules were the only tubers without sorrel growth, as shown in Table H above.

Table H Sprout Growth (mm) Mass Loss (%)

D.I.P.N. 0 3.7

T.C.N.B. 5-8 5,6

Control 15-25 8.2

Example 9

Diisopropylnaphthalene was formulated as a dust at 2% mass / mass and as an emulsifiable concentrate containing 95% mass / vol.

contained active ingredient. The carrier used was fine diatomaceous earth.

The treatment of the tubers took place when filling in seed trays, each shell approximately 25kg of the variety Pentland

Ivory contained.

All formulations were applied by known methods for the application of dusts, at a rate equivalent to 50 mg / kg of the active ingredient of Example 1 to the tuber mass on January 27, 1987.

All treated and control batches were stored in an insulated building and kept at 10 ° C ± 3 ° C. After one month of storage, the inclusion of artificial daylight took place. The tubers were then examined for shoot growth, with the results listed in Table I.

Table I

Treatment delay in sprouting 50 days after treatment

Sprouts (days) no sprouts (Durch

cut of 25)

DIPN spray ~ Z7 4Ü

D.I.P.N. dust 19 4.8

untreated 3 3,4

All tubers were planted on April 20, 1987 under good growth conditions in a limy, hard soil in the Lincolnshire Hillsbrad. Table J details the buildup.

Table J

Treatment days until 50% accumulation

D.I.P.N. spray 11

D.I.P.N. dust 10

unbehait 17

The early growth in both treatments was significantly better than the non-treated lot, however application of a mixture of contact and residual herbicide returned all treatment batches, more than the control batch, as a direct result to their early emergence.

Three weeks later, the plants from the treated seed had the advantage over the non-treated control plants. There was a stem count 30 days and 50 days after planting. The results are listed in Table K.

Table K

Treatment stem count estimate

30 days 50 days

D.I.P.N. spray 7.1 5.9

D.I.P.N. dust 6.0 5.8

untreated 3.8 3.9

From Example 1 (above), pea seed treated with the plant growth regulator before planting showed a substantial increase in root length and number of roots, resulting in a substantial increase in plant growth relative to untreated seed, and that it was possible to sow after treatment of the seed with usual planting technique.

From Example 2, it is clearly seen that the tubers sprayed with plant growth regulator suffered a delay in shoot growth, but an increase in the number of shoots, and that the shoot growth was thicker. The treatment of the stored seed did not give any side effects on the plant potential as soon as the potatoes were germinated.

Example 3 shows that the plant growth regulator, when directly applied to granules and η potato volumes, significantly affected all potatoes and resulted in a marked reduction in the mean shoot catches of the treated potatoes.

Example 4 illustrates the advantages of using the plant growth regulator on the foliage of growing plants, exemplified by cucumbers, as evidenced by the increase in root number, root length and leaf vigor compared to the control plants.

Example 5 shows the effect of the combination diisopropylnaphthalene / emulsifier / water sprayed on potatoes before planting and explains the very significant reduction in the emergence time of the treated potatoes. In the experiment, all the treated potatoes ripened and stabilized before the first untreated potato ripened.

The treated potatoes showed a substantial increase in stems, which is usually indicative of an increase in the number of tubers, and this fact was confirmed by the actual increase in tubers. It was also observed that the usual number of tubers resulting from treated seeds is increased as demonstrated by the total yield of treated seeds.

Example 6 clearly shows the double character of diisopropylnaphthalenes.

When applied to potato under storage conditions with the plant growth regulator applied to granules,

The plant growth regulator effectively retarded the sprouts on the battered potatoes. If the treated

Potatoes without extensive treatment were exposed to germination conditions and were planted, the treated showed Potatoes essentially the same reduction in lead time and an increase in the number of stems, tubers / plant

and increasing the weight of the tubers, as shown in Example 5, wherein the plant growth regulator acts on the tubers by contact application shortly before planting.

Example 7 represents another example of the benefits of the plant growth regulator on the foliage of plants

to apply, in this case it was cucumbers.

Example 8 shows that diisopropylnaphthalene as a shoot growth inhibitor is more effective than T.C.N.8. is and clearly shows one

decreased mass loss in the treated tubers.

Example 9 demonstrates that the diisopropylnaphthalene is found to be effective when applied to an inert dusty carrier

is applied.

While the present invention has been described by way of somewhat limited beliole, they nevertheless show Examples very doutlich the beneficial effects of proposed by the present invention Plant growth regulators in the phase of storage and in the phase of growth, and it show the Experimental ergobnii.se in three different groups of plants the versatility of Diisopropylnaphthalen at

different life forms of plants in general.

Claims (10)

1. Pflanzenvvaor »uum, regulator, characterized in that it contains diisopropylnaphthalene in combination n- · \ .ϊθπι inert carrier. 2. Plant growth regulator according to claim 1, characterized in that it contains a mixture of diisopropylnaphthalenes isomers. 3. plant growth regulator according to claim 1 or 2, characterized in that it is present in combination with an inert granulated carrier. 4. plant growth regulator according to claim 1 or 2, characterized in that it is present in combination with an inert powdered carrier. 5. plant growth regulator according to claim 1,2 or 4, characterized in that it is present in combination with an emulsifier. Plant wax as claimed in claim 1, 2 or 5, characterized in that it is in combination with a diluent. 7. plant growth regulator according to claim 6, characterized in that the diluent is an inert viscous material. Process for the treatment of seeds or plants, characterized in that a growth regulator according to any one of the preceding claims is applied to the seed, plants or growth medium for the seed or plants. 9. The method according to claim 8, characterized in that the dose amount for the plant growth regulator in the range of 5 to 200 parts per million, based on the mass. 10. The method according to claim 8 or 9, characterized in that the dose amount for the plant growth regulator in the range of 10 to 50 parts by mass per million.