JPH1179905A - Phytotoxicity decreasing agent - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain a phytotoxicity decreasing agent useful for protecting cultivated plants from the harmful action due to herbicides by formulating chloranil or dichlone as an active ingredient. SOLUTION: The cultivated plant(e.g. rice plant, maize, etc.) is protected against the harmful action due to herbicides (pyrazosulfuron-ethyl, bensulfuron- methyl, etc.) by formulating chloranil or dichlone as an active ingredient. It is preferable that the weight ratio between chloranil or dichlone and a herbicide is 1:100 to 500:1 and the application amount of chloranil or dichlone is 0.001-100 kg, particularly 0.005-10 kg per 1 hectare. The objective reductive agent can be used as various formulations, e.g. wettable powder emulsifiable concentrate, water-soluble chemical, etc.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to chloranil, which has the effect of protecting cultivated plants from the phytotoxicity of herbicides.
l / generic name) or dichlone (dichlone / generic name) as an active ingredient.

[0002]

BACKGROUND OF THE INVENTION Generally, the use of herbicides can cause undesirable phytotoxicity on treated cultivated plants. Most herbicides are not sufficiently selective for all cultivated plants, and their use is limited to a narrow range.

[0003] In some cases, no herbicides can be used or can be used only at such low doses that the desired broad herbicidal effect on the cultivated plants is not guaranteed. Chloranil is a compound having a bactericidal and algicidal action, and Dicron is a compound having a bactericidal action.

[0004]

Means for Solving the Problems The inventors of the present invention have made intensive studies to solve the above problems, and as a result, chloranil or dicyclone is extremely suitable for protecting cultivated plants against the harmful effects of herbicides. The inventors have found that the present invention has been completed. That is, the present invention relates to a safener comprising chloranil or dicron as an active ingredient.

[0005]

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, the present invention will be described in more detail. Examples of herbicides that can reduce the phytotoxicity to cultivated plants by chloranil or dichloron include, for example,
Pyrazosulfuron ethyl (Pyrazosulfuron ethyl / generic name), bensulfuron methyl (bensulfuron methyl / generic name), sinosulfuron (cinosulfuron / generic name), imazosulfuron (imazosulfuron / generic name), azimusulfuron (a
zimusulfuron / common name), halosulfuron methyl (halosul
furon methyl / generic name), cyclosulfamuron (cyclos
ulfamuron / generic name), Hoe-404 (test name), pretilachlor (pretilachlor / generic name), esprocarb (esproa
(rb / generic name), pyrazolate (Pyrazolate / generic name), pyrazoxifen (pyrazpxyfen / generic name), benzofenap
(bezofenap / generic name), Daimron (dymron / generic name), bromobutide (bromobutide / generic name), naproanilide (nap
roanilide / generic name), clomeprop (generic name), CNP (generic name), chlomethoxynil /
Generic name), bifenox (bifenox / generic name), oxadiazon (oxadiazon / generic name), oxadialgyl (oxadiar
gyl / generic name), cafenstrole (cafenstrole / generic name), MY-100 (test name), MK-243 (test name), pentoxazone (pentoxazone / generic name), pyriminobac-methyl (pyrim
inobacmethyl / generic name), cyhalofop butyl (cyhalofop
butyl / generic name), NBA-061 (test name), mefenacet (mef
enacet / generic name), butachlor (butachlor / generic name), butenachlor (butenachlor / generic name), dithiopyr (dith
iopyr / generic name), benthiocarb (benthiocarb / generic name), dimepiperate (dimepiperate / generic name), molinate (molinate / generic name), butamiphos (butamifos / generic name), quinclorac (quinclorac / generic name), cinmethrin (cinmethylin) / Generic name), simetryn (simetryn / generic name), SAP (bensulide / generic name), dimethamethrin (dimetha
METBN (generic name), MCPA (generic name), MCPB (generic name), etobenzanide (etobenzanid / generic name), cumyluron (cumyluron
/ Generic name), tenylchlor (thenylchlor / generic name), benfresate (benfuresate / generic name), pyributicarb (pyributicarb / generic name) and quinoclamin (ACN / generic name).

The cultivated plants to which the safeners containing chloranil or dicron of the present invention as an active ingredient are applicable are mainly wheat, rye, barley, oats, rice, corn, sorghum, beet, rapeseed, cotton and soybean, and their soybeans. Seeds and the like, preferably, wheat, rye, barley, oats, rice and corn, and their seeds. More preferably, rice is mentioned.

[0007] Chloranil or dicron can be used alone for treating the seeds of cultivated plants or mixed in the furrow before sowing the seeds. Also, chloranil or dicron and a herbicide can be mixed and used before or after germination of a cultivated plant. Pre-emergence treatment includes both treatment of the cultivated area before sowing and treatment of the cultivated area where the seeds have been sown but the cultivated plants have not yet started to grow.

[0008] Chloranil or dicron is preferably used in a mixture with a herbicide. For this purpose, a tank mix or a ready mix is used. The weight ratio of chloranil or dicron to herbicide can vary within wide limits and is preferably in the range from 1: 100 to 500: 1. The optimal weight ratio of chloranil or dicron to herbicide depends on the type of herbicide, chloranil or dicron, the type of cultivated plant to be treated and can be determined by preliminary experiments.

The amount of chloranil or dicron used is usually from 0.001 to 100 kg per hectare, preferably from 0.01 to 100 kg.
It is in the range of 05 to 10 kg. The safener of the present invention containing chloranil or dicron as an active ingredient can be prepared in various forms. Formulations include, for example, wettable powders (WP), emulsions (EC), aqueous solvents (SP), liquids (SL), emulsions
(EW), capsule suspension (CS), suspension (SC), suspoemulsion (SE), powder (DP), oil-miscible solution (OL), granule (GR),
Aqueous granule solvent (SG) and wettable powder for granules (WG).

[0010]

EXAMPLES Hereinafter, the present invention will be described more specifically with reference to examples, but the present invention is not limited to the examples. In addition, "part" means all parts by weight. Formulation Example 1 (granules) Chloranil or Dicron 4 parts Herbicide (pretilachlor) 1 part Bentonite 55 parts Talc 40 parts After uniformly mixing and pulverizing, add a small amount of water, mix and knead, and extrude granulation Granulate in a machine and dry to granules.

Formulation Example 2 (Granular wettable powder) Chloranil or Dicron 50 parts Herbicide (esprocarb) 25 parts Anionic surfactant Hytenol NE-15: 5 parts manufactured by Daiichi Kogyo Seiyaku Co., Ltd. Anionic surfactant Vanirex N: Nippon Paper Industries Co., Ltd. 10 parts White carbon (anti-caking agent) Carplex # 80D: Shionogi Pharmaceutical Co., Ltd. 10 parts After uniformly mixing and grinding, add a small amount of water and stir and mix. It is kneaded, granulated by an extrusion granulator, and dried to obtain a wettable powder. Formulation Example 3 (Wettable powder) Chloranil or Dicron 40 parts Herbicide (mefenacet) 10 parts Pyrophyllite 46 parts Mixture of anionic surfactant and nonionic surfactant Solpol 5039: Toho Chemical Industry Co., Ltd. 2 parts White Carbon (anti-caking agent) Carplex # 80D: Shionogi & Co., Ltd. 2 parts or more are uniformly mixed and pulverized to obtain a wettable powder. Next, the usefulness of chloranil or dicron as a safener will be specifically described in the following test examples. Test Example 1 (Pharmaceutical test under transplanted paddy rice under shallow planting conditions) After placing alluvial soil in a 1/5000 arel Wagner pot, water was added and mixed to obtain a flooding condition at a depth of 4 cm. 2.5
Rice seedlings in leaf stage were transplanted at a depth of 0.5 cm.

On the day of transplantation, a suspension of chloranil, dicron, pretilachlor, esprocarb, and mefenacet at a predetermined concentration was treated with a mesipet using a wettable powder prepared in accordance with Formulation Example 3. Three weeks after treatment with the single agent and the mixture, the above-ground living weight of rice was measured and compared with the untreated group.

Table 1 shows the test results for the single agent, and Table 2 shows the test results for the mixed agent. From the test results, the mixture of chloranil (abbreviated as (A) in the table below) or dicron (abbreviated as (B) in the table below) and the herbicide significantly reduced the phytotoxicity to transplanted rice, It was found to be very suitable for the selective control of weeds.

[0014]

[Table 1] Table 1 Chemical damage test of transplanted rice under shallow planting conditions (single agent) 処理 Treatment Amount Non-treated weight ratio Compound (g / ha) (%) ─────────────────────────── (A) 500 100 (B) 500 100 Pretilachlor 100 55 200 43 Esprocarb 200 77 400 56 Mephena set 100 48 200 23 ───────────────────────────

[0015]

[Table 2] Table 2 Chemical damage test of transplanted rice under shallow planting conditions (mixture) ───────────────────────────── ─ Treated amount Non-treated group compound (g / ha) (%) ────────────────────────────── (A) + pretilachlor 500 + 100 100 500 + 200 100 (A) + esprocarb 500 + 200 100 500 + 400 100 (A) + mephena set 500 + 100 100 500 + 200 100 (B) + pretilachlor 500 + 100 100 500+ 200 100 (B) + Esprocarb 500 + 200 100 500 + 400 100 (B) + Mephena set 500 + 100 100 500 + 200 100 ────────────────────── ────────

[0016]

EFFECTS OF THE INVENTION Chloranil or dicron can reduce the herbicide's phytotoxicity to cultivated plants by applying it to the cultivated plant, seeds or cultivated area of the cultivated plant before and after or simultaneously with the application of the herbicide. . A mixture of chloranil or dicron and a herbicide significantly reduces the phytotoxicity to transplanted rice and is very suitable for the selective control of weeds.

Claims (1)

[Claims] 1. A herbicide safener comprising chloranil or dicron as an active ingredient.