JPH1160409A - Composition for reducing phytotoxicity of herbicide - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain a composition for reducing the phytotoxicity of herbicides by including dymron and ethephon. SOLUTION: This composition contains (A) dymron and (B) ethephon usually in amounts of 1 pt.wt. and 0.01-100 pts.wt., preferably 0.1-10 pts.wt., respectively. The composition is used for treating the seeds or seedlings of useful plant (rice, upland field crops, lawn grasses and the like, especially rice). The agrochemical whose phytotoxicity can be reduced by the use of the composition includes herbicides, insecticides, fungicides, plant growth regulators and the like, especially herbicides such as herbicides for paddy fields (pyrazosulfuron- ethyl and the like) or herbicides for upland fields or lawn grasses (simazine, dichlobenil and the like).

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a composition for reducing the phytotoxicity of pesticides, especially herbicides, and a method of using the same.

[0002]

2. Description of the Related Art In general, in rice-flooded direct sowing cultivation, rice paddy is directly sown in a flooded paddy field, and a herbicide is sprayed after germination of the paddy. In this case, phytotoxicity is likely to occur except for herbicides which are physiologically selective for rice, and usable drugs are limited. Also, in transplantation cultivation, there is a risk of chemical injury in warm areas, sandy loam, and paddy fields with severe water leakage.

[0003] Daimron (generic name) has been found to have an effect of reducing the phytotoxicity of certain herbicides (Japanese Patent Application Laid-Open No. 5-16402), and mixed preparations have been developed. But,
Its phytotoxic effect is insufficient under soil and weather conditions where phytotoxicity is strongly recognized.

[0004]

Means for Solving the Problems The present inventors treat Daimlon and Ethephon (generic names) simultaneously or in close proximity before sowing rice paddy or transplanting rice seedlings into paddy fields. The present inventors have found that the phytotoxicity of various pesticides, particularly herbicides, is reduced, and completed the present invention.

That is, the present invention provides a composition for reducing the phytotoxicity of a herbicide (hereinafter, referred to as the composition of the present invention) which contains Dimelone and ethephon as active ingredients, and a method of using the same (hereinafter, referred to as the present invention). Method).

[0006]

DETAILED DESCRIPTION OF THE INVENTION The composition of the present invention comprises
Ethephon is usually contained in an amount of 0.01 to 100 parts by weight, preferably 0.1 to 10 parts by weight based on parts by weight. Examples of the pesticides whose phytotoxicity is reduced by using the composition of the present invention include herbicides, insecticides, fungicides, and plant growth regulators, and especially herbicides. Examples of the herbicide include a paddy rice herbicide, a field herbicide, and a turf herbicide. For example, the Farm Chemicals Handbook (Fa
rm Chemicals Handbook) 1997 edition.

[0007] As herbicides for paddy rice, pyrazosulfuron ethyl (pyrazosulfuron ethyl / general name), bensulfuron methyl (bensulfuron methyl / generic name), sinosulfuron (cinosulfuron / generic name), imazosulfuron (imazosulfuron / generic name), DPX -A8947 (N-
(((4-dimethoxypyrimidin-2-yl) amino-carbonyl))-1-m
ethyl-4- (2-methyl-2H-tetrazol-5-yl) -1H-pyrazole-5-
sulfonamide), pretilachlor (generic name), esprocarb (esprocarb / generic name), pyrazolate (pyrazolate / generic name), pyrazoxifene (py
razoxyfen / generic name, benzofenap
/ General name), bromobutide (bromobutide / generic name),
Naproanilide (naproanilide / generic name), clomeprop (clomeprop / generic name), CNP (generic name), chloromethoxynil (chlomethoxynil / generic name), bifenox (bifenox / generic name), oxadiazon (oxadiazon)
/ Generic name), mefenacet (mefenacet / generic name),
Butachlor (butachlor / generic name), butenachlor (butenachlor / generic name), dithiopyr (dithiopyr / generic name), benfresate (benfuresate / generic name), pyributicarb (pyributicarb / generic name), benthiocarb (benthiocarb / generic name), dimepiperate ( dimepip
erate / generic name), molinate (molinate / generic name),
Butamifos (common name), quinclorac (q
uinclorac / generic name), simmethrin (cinmethylin / generic name), simetryn (simetryn / generic name), SAP (be
nsulide / generic name), dimethametryn /
Generic name), MCPA (generic name), MCPB (generic name),
2,4PA (generic name), 2 ′, 3′-dichloro-4-ethoxymethoxybenzalinide (test name is HW-5
2), 1- (2-chlorobenzyl) -3- (α, α-dimethylbenzyl) urea (test name is JC-940), N-
[2 '-(3'-methoxy) -thienylmethyl] -N-
Chloroacetyl-2,6-dimethylanilide (test name: NSK-850) and the like.

[0008] As a field-acting herbicide, simazin
e / generic name), diclobenzyl (dichlobenil / generic name), diuron (diuron / generic name), chloro-IPC (ch
lorpropham / generic name), atrazine (atrazine / generic name), alachlor (alachlor / generic name), isouron
(isouron / generic name), chlorphtalim /
Generic name), cyanazine (cyanazin / generic name), trifluralin (trifluralin / generic name), halosulfuron (halo)
sulfuron / generic name, butamifos / generic name, propyzamide (propyzamide / generic name), benthiocarb (thiobencarb / generic name), promethrin (pro
metryn / generic name), pendimethalin (pendimethalin)
/ Generic name), metolachlor (metolachlor / generic name), metribuzin (metribuzin / generic name), linuron (linuron / generic name), renacil (lenacil / generic name),
Mogeton (quinoclamine / generic name), propanil (prop
anil / general name), MCPA (generic name), ioxynil (ioxynil octanoate / generic name), ashram (asulam
/ Generic name), quizalofop-ethyl /
Generic name), sethoxydim (generic name), thifensulfuron-methyl (generic name), fenoxaprop-ethyl /
Common name), phenmedipham (common name), fluazifop-butyl (common name), bentazone (bentazone / common name) and the like.

[0009] As turf herbicides, simazine (simazine)
/ Generic name), diclobenzyl (dichlobenil / generic name), chloro-IPC (chlorpropham / generic name), SAP
(bensulide / generic name), TCTP (chlorthal-dimethy
l, tetorachlorothiophene / generic name), atrazine (atr
azine / generic name), amiprophosmet
hyl / generic name), ametrine (ametryn / generic name), isoxaben (isoxaben / generic name), orthobencarb (or
bencarb / general name), carbbutyrate (karbutilate / generic name), chlorphthalim (chlorphtalim / generic name), cyanazine (cyanazin / generic name), dithiopyr
/ Generic name), siduron (siduron / generic name), thiazafluron (thiazafluron / generic name), trifluralin (tri
fluralin / generic name), napropamide (napropamide / generic name), bifenox (bifenox / generic name), pyributicarb (pyributicarb / generic name), butamifos (butamifo)
s / generic name), prodiamine (prodiamine / generic name), propyzamide (propyzamide / generic name), bethrosin (bene
fin / generic name), pendimethalin (pendimethalin / generic name), methyl dymron (generic name),
Linuron (linuron / generic name), Lenacil (lenacil / generic name), 2,4-PA (generic name), MCPPA (generic name), Mogeton (quinoclamine / generic name), MCPA
(Generic name), ioxynil (ioxynil octanoate / generic name), ashram (asulam / generic name), thifensulfuron-methyl (generic name), fenoxaprop-ethyl (fenoxaprop-ethyl / generic name), fenmed Fem (phenmedipham / common name),
Flazasulfuron (common name), metsulfuron-methyl (common name), imazaquin (imazaquin / common name), imazosulfuron (imazo
sulfuron / generic name, imazapyr (imazapyr / generic name), tetrapion (flupropanate / generic name), tebuthiuron (tebuthiuron / generic name), halosulfuron (hal)
osulfuron / generic name, bromacil / generic name, hexazinone / hexazinone / bentazone / bentazone.

[0010] Useful plants for which the composition of the present invention is effective include rice, upland crops and turf, and especially rice. The composition of the present invention can suppress the phytotoxicity of useful plants by pesticides, particularly herbicides, by treating the seeds or seedlings of the useful plants. Examples of seeds include artificial seeds in addition to those normally collected.

The method of the present invention includes a method of immersing a seed or a seedling of a useful plant in a solution containing the composition of the present invention, a method of irrigating the composition of the present invention into soil or a medium of the seedling, and a method of the present invention. Examples include a method of dressing a seed or a seedling with a powder containing the composition. The treatment time is not limited, but is preferably before the application of the pesticide, and the treatment with Daimlon and ethephon may be performed simultaneously, or separately if they are close in time.

Next, rice will be specifically described. In flooded direct sowing cultivation of rice, rice seeds are directly sown in flooded paddy fields, and a herbicide is sprayed after germination of the rice, by sowing the rice seeds immersed in a solution containing the composition of the present invention, The herbicide used thereafter can be less harmful to rice.

In transplanting and cultivating rice, a rice seedling grown in a nursery box is transplanted to a paddy field, and then a herbicide is sprayed thereon. The rice seedling immersed in the solution containing the composition of the present invention or the composition of the present invention By transplanting a seedling obtained by irrigating the thing into a nursery box, the phytotoxicity of the herbicide to rice can be reduced. In treating the composition of the present invention, it is generally mixed with a suitable solid carrier or liquid carrier, and further, if desired, a surfactant, a penetrant, a spreading agent, a thickener, a deicing agent, a binder, It can be put to practical use in any form such as a solution, an emulsion, a wettable powder, a dry flowable, a flowable, a powder, a granule, etc. by adding an anti-caking agent, an anti-decomposition agent and the like. Further, from the viewpoint of labor saving and improvement of safety, the above-mentioned preparation of any dosage form can be provided by being enclosed in a water-soluble package.

As the solid carrier, for example, kaolinite,
Natural minerals such as pyrophyllite, sericite, talc, bentonite, acid clay, attapulgite, zeolite and diatomaceous earth; inorganic salts such as calcium carbonate, ammonium sulfate, sodium sulfate and potassium chloride; synthetic silicic acid; and synthetic silicate. . Examples of the liquid carrier include water, alcohols (ethylene glycol,
Propylene glycol, isopropanol, etc.), aromatic hydrocarbons (xylene, alkylbenzene, alkylnaphthalene, etc.), ethers (butyl cellosolve, etc.), ketones (cyclohexanone, etc.), esters (γ-butyrolactone, etc.), acid amides (N -Methylpyrrolidone,
N-octylpyrrolidone, etc.) and vegetable oils (soybean oil, rapeseed oil, cottonseed oil, castor oil, etc.). These solid and liquid carriers may be used alone or in combination of two or more.

Examples of the surfactant include polyoxyethylene alkylaryl ether, polyoxyethylene styryl phenyl ether, polyoxyethylene polyoxypropylene block copolymer, polyoxyethylene fatty acid ester, sorbitan fatty acid ester and polyoxyethylene sorbitan fatty acid ester. Nonionic surfactants, alkyl benzene sulfonates, lignin sulfonates, alkyl sulfosuccinates, naphthalene sulfonates, alkyl naphthalene sulfonates,
Salts of formalin condensate of naphthalene sulfonic acid, salts of formalin condensate of alkyl naphthalene sulfonic acid, polyoxyethylene alkyl aryl ether sulfates and phosphates, polyoxyethylene styryl phenyl ether sulfates and phosphates and ionic properties such as alkylamine salts Surfactants. These surfactants may be used alone or in combination of two or more.

[0016]

【Example】

[Test Method] After washing 1.7-leaf rice (cultivar: moonlight) grown in a seedling box, the roots were cut to 2 cm and immersed in Daimron or a solution of a predetermined concentration of Daimron and ethephon for 3 days. Using the rinsed seedlings, 0 cm was planted in a porcelain pot having an inner diameter of 12 cm, which was filled with water and replaced with water, so as to easily cause chemical damage (number of seedlings: 5 seedlings / pot).
On the third day after planting, the plants were treated with various herbicides, and on the 34th day after the treatment, the evaluation of phytotoxicity was carried out in six stages from 0 (no effect) to 5 (complete mortality) on the above-ground growth inhibition. Note that 2,
4PA evaluated the appearance of roll leaves on a similar six-point scale. The results are shown in Tables 1 to 4.

[0017]

[Table 1] [Table 1] Drug name Immersion concentration (ppm ) Herbicide Observational evaluation Daimlon Ethephon (g / 10a) ──────────────────────────────────── Caffeine sterol − −10 4.5 Caffeine sterol 10 −10 1.0 + Dimeron Caffeine sterol 10 10 100.2 + Dimelon + Ethephon Daimelon 10 − −0.0 Ethephone −10 −0.0 No treatment − − −0.0 ─── ─────────────────────────────────

[0018]

[Table 2] [Table 2] 名 Drug name Immersion concentration (ppm ) Herbicide Observational evaluation Daimlon Ethephon (g / 10a) プ レ Pretilachlor- −10 4.2 Pretilachlor 10 −10 1.4 + Dimelon Pretilachlor 10 10 100.4 + Dimelon + Ethephon Daimelon 10 −−0.0 Ethephon −10 −0.0 No treatment − − −0.0 ─── ─────────────────────────────────

[0019]

[Table 3] [Table 3] Drug name Immersion concentration (ppm ) Herbicide Observational evaluation Daimlon Ethephon (g / 10a) ──────────────────────────────────── Imazosulfuron − −25 1.3 Imazosulfuron 10 −25 0.9 + Dimron Imazosulfuron 10 10 250.5 + Dimron + Ethephon Daimron 10 −−0.0 Ethephon −10 −0.0 No treatment − − −0.0 ─── ─────────────────────────────────

[0020]

[Table 4] ──────────────────────────────────── Drug name Immersion concentration (ppm ) Herbicide Observational evaluation Daimlon Ethephon (g / 10a) ────────────────────────────────────2 4PA--12.5 4.0 2,4PA 10-12.5 3.2 + Daimlon 2,4PA 10 10 12.5 1.8 + Daimlon + Ethephon Daimlon 10--0.0 Ethephon-10-0. 0 No processing---0.0 ────────────────────────────────────

In the above-mentioned embodiment, the range of allowable phytotoxicity determined from a practical point of view was 0.5 or less. Table 1 to Table 4
As is clear from the above, when the composition of the present invention was treated, the phytotoxicity to transplanted rice was reduced, and a high herbicidal effect was maintained.

 ────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Fumitaka Tango 3-7-1, Kandanishikicho, Chiyoda-ku, Tokyo Inside Sansan Chemical Industry Co., Ltd.

Claims (16)

[Claims] 1. A composition for reducing the phytotoxicity of a herbicide, comprising Daimlon and ethephon as active ingredients. 2. The composition according to claim 1, wherein the amount of ethephon is 0.1 to 10 parts by weight based on 1 part by weight of Daimlon. 3. The herbicide according to claim 1, wherein the herbicide is a rice herbicide.
A composition as described. 4. The composition according to claim 1, wherein the herbicide is a field herbicide or a turf herbicide. 5. The method according to claim 1, wherein the seeds are useful plants.
Composition. 6. The seed of a useful plant is rice paddy.
Composition. 7. The composition according to claim 5, wherein the useful plant seed is a field crop seed or a turf seed. 8. The composition according to claim 5, wherein the seed of the useful plant is an artificial seed. 9. The composition of claim 1, which is processed into a rice nursery box. 10. The composition according to claim 1, which is applied to rice seedlings before transplantation. 11. A method for reducing the phytotoxicity of a herbicide by using the composition of claim 1. 12. The method according to claim 11, wherein the herbicide is a rice herbicide. 13. A method for reducing the phytotoxicity of a herbicide by treating the seed of a useful plant with the composition of claim 1. 14. The method according to claim 13, wherein the seed of the useful plant is rice paddy. 15. A method for reducing the phytotoxicity of a rice herbicide by applying the composition of claim 1 to a rice seedling raising box. 16. A method for reducing the phytotoxicity of a rice herbicide by treating the rice seedling before transplantation with the composition of claim 1.