Plant protecting and regulating compositions – Plant growth regulating compositions – Plural active ingredients
Reexamination Certificate
1999-07-21
2001-03-27
Dees, Jose′ G. (Department: 1616)
Plant protecting and regulating compositions
Plant growth regulating compositions
Plural active ingredients
Reexamination Certificate
active
06207616
ABSTRACT:
FIELD OF THE INVENTION
The present invention relates to a herbicidal composition.
BACKGROUND OF THE INVENTION
Currently, various herbicides are being utilized, but since there are various weeds that are targets of control, and because the growth of weeds continues for a long time, a herbicide is desired that has a higher herbicidal activity, a faster appearance of herbicidal effect, a wider herbicidal spectrum and that is safe for crops.
SUMMARY OF THE INVENTION
The present inventor has intensely studied to seek out an excellent herbicide, and has found that by applying a herbicidal composition (hereinafter, referred to as the present inventive composition) which comprises, as active ingredients, (i) 3,6-dichloro-2-methoxybenzoic acid or salts thereof (common name: dicamba, hereinafter, referred to as dicamba), and (ii) ethyl 2-chloro-3-[2-chloro-5-(1,3-dioxo-4,5,6,7-tetrahydroisoindolin-2-yl)phenyl]acrylate (common name: cinidon-ethyl, hereinafter, referred to as cinidon-ethyl), various weeds that emerge or grow in crop-lands or non-crop-lands can be controlled effectively, thereby completing the present invention. That is, since the herbicidal effect of the present inventive composition is synergistically increased as compared with the cases where the active ingredients are independently used, the amount used thereof can be reduced. By using the present inventive composition, the time necessary for appearance of a herbicidal effect can be shortened, and a broadened weed control spectrum can be achieved synergistically, as compared with the cases where the active ingredients are independently used. Moreover, a wide variety of weeds can be controlled selectively, without producing problems of phytotoxicity against crops such as corn, soybean, wheat, barley, oats, rye and rice. In particular, when used in a corn field, the present composition is excellent for selectivity. Accordingly, the present invention has been obtained.
DETAILED DESCRIPTION OF THE INVENTION
The present invention provides a herbicidal composition that comprises, as active ingredients, (i) dicamba and (ii) cinidon-ethyl.
Dicamba is a compound described in Farm Chemicals Handbook, 1995 (established by Meister Publishing Co., 1995) page C39 and the like.
Cinidon-ethyl is a compound described in JP 62-185071 A.
In the present invention, “salts” comprises all agrochemically acceptable salts.
The present inventive herbicidal compositions are excellent as herbicides because they have a herbicidal activity against a wide variety of weeds with good selectivity between weeds and crops, and they exhibit an excellent herbicidal activity in no-till cultivation and non-agricultural fields as well as in till cultivation.
The present inventive herbicidal compositions have a herbicidal activity against the following variations of weeds that cause problems for crops in fields of corn, soybean, wheat, barley, oats, rye or rice.
Polygonaceous weeds: wild buckwheat (
Polygonum convolvulus
), pale smartweed (
Polygonum lapathifolium
), pennsylvania smartweed (
Polygonum pensylvanicum
), ladysthumb (
Polygonum persicaria
), curly dock (
Rumex crispus
), broad leaf dock (
Rumex obtusifolius
) and Japanese knotweed (
Polygonum cuspidatum
);
Portulacaceous weeds: common purslane (
Portulaca oleracea
);
Caryophyllaceous weeds: common chickweed (
Stellaria media
);
Chenopodiaceous weeds: common lambsquarters (
Chenopodium album
) and kochia (
Kochia scoparia
)
Amaranthaceous weeds: redroot pigweed (
Amaranthus retroflexus
) and smooth pigweed (
Amaranthus hybridus
);
Cruciferous (brassicaceous) weeds: wild radish (
Raphanus raphabistrum
), wild mustard (
Sinapis arvensis
) and Shepherds purse (
Capsella bursa-pastoris
);
Leguminous (fabaceous) weeds: hemp sesbania (
Sesbania exaltata
), sicklepod (
Cassia obtusifolia
), Florida beggarweed (
Desmodium tortuosum
), and white clover (
Trifolium repens
);
Malvaceous weeds: velvetleaf (
Abutilon theophrasti
) and prickly sida (
Sida spinosa
);
Violaceous weeds: field pansy (
Viola arvensis
) and wild pansy (
Viola tricolor
);
Rubiaceous weeds: catchweed bedstraw (
Galium aparine
);
Convolvulaceous weeds: ivyleaf morningglory (
Ipomoea hederacea
) tall morningglory (
Ipomoea purpurea
), entireleaf morningglory (
Ipomoea hederacea
var.
integriuscula
), pitted morningglory (
Ipomoea lacunosa
) and field bindweed (
Convolvulus arvensis
);
Labiate weeds: red deadnettle (
Lamium purpureum
) and henbit (
Lamium amplexicaure
);
Solanaceous weeds: jimsonweed (
Datura stramonium
) and black nightshade (
Solanum nigrum
);
Scrophulariaceous weeds: Persian speedwell (
Veronica persica
) and Ivyleaf speedwell (
Veronica hederifolia
);
Composite weeds: common cocklebur (
Xanthium pensylvanicum
), common sunflower (
Helianthus annuus
), scentless chamomile (
Matricaria perforata
or
inodora
), corn marigold (
Chrysanthemum segetum
), pineappleweed (
Matricaria matricarioides
), common ragweed (
Ambrosia artemisiifolia
), giant ragweed (
Ambrosia trifida
), Mare'stail (
Erigeron canadensis
),
Artemisia princeps,
Solidago altissima;
Boraginaceous weeds: forget-me-not (
Myosotis arvensis
)
Asclepiadaceous weeds: common milkweed (
Asclepias syriaca
)
Euphorbiaceous weeds: sun spurge (
Euphorbia helioscopia
) and spotted spurge (
Euphorbia maculata
)
Graminaceous weeds: barnyardgrass (
Echinochloa crus
-
galli
), green foxtail (
Setaria viridis
), giant foxtail (
Setaria faberi
), large crabgrass (
Digitaria sanguinalis
), goosegrass (
Eleusine indica
), annual bluegrass (
Poa annua
), blackgrass (
Alopecurus myosuroides
), wild oat (
Avena fatua
), johnsongrass (
Sorghum halepense
), quackgrass (
Agropyron repens
), downy brome (
Bromus tectorum
), Bermudagrass (
Cynodon dactylon
), fall panicum (
Panicum dichotomiflorum
), Panicum texanum and shattercane (
Sorghum vulgare
);
Commelinaceous weeds: common dayflower (
Commelina communis
)
Equisetaceous weeds: field horsetail (
Equisetum arvense
);
Cyperaceous weeds: rice flatsedge (
Cyperus iria
), purple nutsedge (
Cyperus rotundus
) and yellow nutsedge (
Cyperus esculentus
)
At the same time the present inventive composition exhibits no significant phytotoxicity on crops such as corn, soybean, wheat, barley, oats, rye and rice. In particular, when used in corn field, the present composition is excellent for selectivity.
When the present inventive composition is used in paddy fields, it may be sprayed to foliage of weeds in a preplant burndown application before flooding, or after seeding rice it may be sprayed to foliage of weeds in a delayed pre-emergence application before flooding preferably.
The present composition effectively exhibits an excellent herbicidal activity on weeds, e.g., dicotyledonous plants such as hemp sesbania (
Sesbania exaltata
), ivyleaf morningglory (
Ipomoea hederacea
), tall morningglory (
Pharbitis purpurea
), entireleaf morningglory (
Ipomoea hederacea
var.
integriuscula
), pitted morningglory (
Ipomoea lacunosa L.
), common cocklebur (
Xanthium pensylvanicum
), and pensylvania smartweed (
Polygonum pensylvanicum
); and monocotyledonous plants such as barnyardgrass (
Echinochloa crus
-
galli
), southern crabgrass (
Digitaria ciliaris
), goosegrass (
Eleusine indica
), sprangletop (
Leptochloa chinensis
), broadleaf signalgrass (
Brachiaria platyphylla
), umbrella sedge (
Cyperus difformis
), and rice flatsedge (
Cyperus iria
), while it exhibits no significant phytotoxicity on rice.
For the present inventive composition, the mixing ratio of dicamba to cinidon-ethyl for active ingredients, may vary with the species of weeds to be controlled, the situation, conditions of application and the like, but is usually in the range from about 3:1 to 300:1 by weight, preferably, in the range of about 10:1 to 50:1 by weight.
The present inventive composition is usually utilized after formulating into emulsifiable concentrates, wettable powders, flowables, granules or the like by mixing a solid carrier(s), liquid carrier(s), or the like, and when necessary, adding surfactant(s) or other adjuvants for formulation. The for
Birch & Stewart Kolasch & Birch, LLP
Dees Jose′ G.
Pryor Alton
Sumitomo Chemical Company Limited
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