JPH0272104A - Plant-growth regulating composition - Google Patents

Abstract

PURPOSE:To obtain the subject composition by combining a compound such as a lodging reducing agent or a flowering regulation agent exhibiting plant growth regulating action by foliar treatment with sodium 2,3:4,6-di-O- isopropylidene-alpha-L-xylo-2-hexurofuranosonate. CONSTITUTION:The objective plant-growth regulating composition contains a compound of formula I [A is H or methyl; R is hydroxyl, 1-6C alkoxy, alkoxyalkoxy, mono- or dialkylamino or -O-Cat (Cat is organic or inorganic cation)] (e.g. the compound of formula II) and sodium 2,3:4,6-di-O- isopropylidene-alpha-L-xylo-2-hexurofuranosonate. A synergistic effect can be attained by the combination of the above two kinds of compounds. Furthermore, the composition is effective in eliminating dark green discoloration and yellowish white discoloration of a plant to give a plant having appearance similar to the untreated plant. This is an important factor on an ornamental plant.

Description

[Detailed description of the invention] (Industrial application field) TECHNICAL FIELD The present invention relates to a plant growth regulating composition.

(Problems to be solved by the invention) The compound (1) group exerts a strong plant growth regulating effect mainly in foliage treatment, and in grasses, it particularly suppresses the elongation of the parts, and even in broad-leaved plants and coniferous trees, it suppresses new shoots. , suppresses the elongation of new stalks, and also has the effect of inducing flower buds and thinning fruit. Therefore, it has a wide range of uses, including a lodging reducing agent for rice and wheat due to its short culm effect, a mowing agent for hedges and potted plants, a herb suppressant for lawns and non-agricultural land, a fruit thinning agent, and a flowering regulator. However, there are large differences in sensitivity depending on the plant species; for example, as a lodging reducing agent for rice, about 10 g/10 a is sufficient, but for wheat, 50 g/loa or more is required. Even among broad-leaved plants, the activity is high in azaleas and Portulaca, but there is a several-fold difference in activity in Abelia and Solanaceae plants.

The same can be said of turfgrasses and non-agricultural weeds.

For this reason, there are drawbacks, such as requiring a very large amount of medication in some cases, and spraying a small amount of highly concentrated liquid, depending on the conditions, may cause plant damage such as leaf blight.

On the other hand, Compound A is mainly used in trees as a foliar treatment type inhibitor of new shoots and new stalks, but it requires spraying a large amount of a highly concentrated solution, and in some cases, it may cause yellowing of the new shoots. has problems such as leaf curling.

In addition, in many cases, it is not very active in gramineous plants, which limits its use.

(Problems to be Solved by the Invention) The present inventors have discovered that when these are mixed and sprayed, they have an activity that far exceeds that of each agent alone, that is, a synergistic effect. Furthermore, we also found that the greening and yellowish whitening disappeared and the condition became similar to that of no treatment.

This is especially important for ornamental plants.

Based on this, we conducted various studies and discovered various benefits, including the ability to significantly reduce the dosage, the ability to reduce changes in leaf color, and the ability to expand the application to situations where it would be difficult to use each single agent. . Furthermore, the present invention was completed by examining the drug amount and mixing ratio.

The synergistic effect between compound (1) group and compound A is recognized over a wide range of areas, and the compounds and mixing ratio may be determined depending on the target plant species and purpose.

For example, in reducing the lodging of wheat, when the compound (1) group is taken as 1, a ratio of 2 to 10 is good, and for trees, 0.
A value of 3 to 3 is good, and a range of 0.2 to 1 is good for grass.

Furthermore, although the amount of spray liquid is important in terms of spray efficiency, in the composition of the present invention, a sufficient effect can be obtained even at 100ffi/10a or less, which is 1/2 to 1/3 of that of Compound A alone.

When spraying, individual formulations of each agent may be mixed on site, but an integrated formulation is even better. Depending on the nature of the compound, the integrated preparation should preferably be an aqueous solution or an aqueous sol.

When using a water-solvent, a compound that is soluble in water may be selected, and a surfactant may be added to improve adhesion to the leaf surface.

When used as a sol, various anionic or nonionic surfactants such as alkylbenzene sulfonates, alkylnaphthalene sulfonates, dialkyl sulfosuccinates, polyoxyethylene lauryl ether, polyoxy Examples include ethylene nonylphenyl ether and sorbitan monostearate, and ethylene glycol and inorganic salts may be added as thickeners and stabilizers.

Furthermore, if necessary, a bactericide or an insecticide may be added.

After Table 1 shows representative compounds of the compound (1) group, individual compounds are indicated by compound numbers.

Table 1, Compound (1) Group Compound Nα Structure Hemi Formula Compound Nα R Formula % Formula % Monomers of Compound (1) Group and Compound B at the 3-3°5 leaf stage of various plants grown in 100 cJ unglazed forest. Spray concentration 500pp- to liquid equivalent to 100f/10a of predetermined concentration of agent and mixture.
A nonionic surfactant was added and sprayed with a spray gun.

An observational investigation was conducted 3 weeks after the spraying, and the results are shown in Table 2.

The criteria for the investigation are as follows.

0: Same as no treatment 1: 20% suppression 2: 40% 〃 3: 60% 〃 4: 80% 〃 5 F 100% 〃 (Not elongated compared to the time of treatment B) T: Severe separation G: Dark greening〃 B-1 One with curly leaves B-2 Small B-3 - Medium C-1 White clay visible - Fine C-2 Small C-3 Medium (Some Table 2゜Various plant foliage treatment test resultsTable 2゜Continued Table 3゜Bluebill foliage treatment test Test example 2. Bluetail stem and leaf treatment test Bluetail grown in 100c+fl clay pots were thinned out, seven plants at the four-leaf stage were placed in each pot, and predetermined dilutions of compound (1) group and compound A as a single agent or a mixture were prepared using 1001/L O
A nonionic surfactant was added to 500 ppm and sprayed with a spray gun.

Table 3 shows the results of an observational survey conducted 3 weeks after the spraying.

Test example 3. Barley pre-heading treatment 3 rows x 4 fields of barley (Kashimamugi) sown in autumn
It was divided into 1 unit area.

100% diluted solution of each single agent and mixture 10 days before heading! /10a
Spray nonionic surfactant at a concentration of 500 ppm
It was added so as to be uniformly distributed within the area using a small pressurized sprayer. Two weeks after spraying, changes in leaf color were observed, and culm length and panicle length were examined for 15 plants in each section before harvesting. The results are shown in Table 3.

The leaf color was shown based on the standards of Test Example 1.

Culm length and panicle length are expressed as percentages of untreated samples, and numbers in parentheses indicate actual numbers.

Test example 4. Abelia foliage treatment test An Abelia hedge with a width of about 60 cm and a height of 60 cm was divided into 1 m sections to form one unit area. Compound Nα during the elongation period of new shoots after pruning
A nonionic surfactant was added to the liquid and sol formulations of 6 and compound Nα10, as well as the diluted solutions of each single agent, to give a spraying concentration of 500 ppm.
The equivalent of 1/10 a was sprayed. Table 5 shows the results of observational surveys conducted 3 weeks and 3 months after spraying.

The criteria for the investigation are based on Test Example 1.

Test example 5. Noshiba foliage treatment test After the rainy season, set up a unit area of 2.25 rrr in the Noshiba field during the later growing season, and 5 days after cutting, apply a nonionic surfactant to each integrated preparation and single agent diluted solution at a concentration of 500 ppm. A liquid volume of 1001/10 a was uniformly sprayed in the area using a hand pressurized sprayer. Table 6 shows the results of an observational survey conducted 2 and 4 weeks after the spraying.

Formulation example 1. Creating a sol To 40 parts of compound No. 2, add 50.3 parts of water, 5 parts of surfactant Tsuruzel 3742 (Toho Chemical Trademark), and 0.5 parts of Tsurupol 7512 as an antifoaming agent. After grinding with a sand grinder and taking out, add 4 parts of ethylene glycol and ■ANGEL-,B as a thickener and stabilizer.
Add 2 parts of O, stir well, and reduce to 40% of compound Nα2.
A sol was obtained.

[All parts indicate parts by weight.] Same hereafter] Formulation Example 21
Preparation of the sol of the present invention 40 parts of a 50% sol of Compound NO39 obtained in the same manner as in Preparation Example 1 and 55.6 parts of a 18% solution of Compound A
0.5 parts of Tsurupol 3742 and 3.9 parts of distilled water
A sol containing 20% of Compound No. 9 and 10% of Compound A was obtained.

Formulation Example 31 Preparation of liquid preparation of the present invention 10 parts of compound Nα6, 33.4 parts of distilled water and 55.6 parts of 18% liquid preparation of compound A were mixed, and 1 part of compound Nα6 was mixed.
A solution containing 0% and 10% of Compound A was obtained.

Claims (1)

[Claims] As active ingredients, a compound represented by the general formula (1) and sodium=2,3:4,6-di-O-isopropylidene-α-L-xylo-2-hexulofuranosonar Plant growth regulating composition (1) ▲ There are mathematical formulas, chemical formulas, tables, etc. ▼ In formula (1), A is a hydrogen atom or a methyl group, and R is a hydroxyl group with 1 carbon number. -6 alkoxy group, alkoxyalkoxy group, mono- or dialkylamino group, or -O-cat (here, cat is an organic or inorganic cation)
The compound shown in