Plant protecting and regulating compositions – Plant growth regulating compositions – Plural active ingredients
Patent
1994-02-28
1995-09-19
Raymond, Richard L.
Plant protecting and regulating compositions
Plant growth regulating compositions
Plural active ingredients
504128, 504133, 504136, 504137, 504140, 504143, A01N 5704
Patent
active
054515629
DESCRIPTION:
BRIEF SUMMARY
This invention concerns new herbicidal compositions and methods of combating weeds.
PRIOR ART
U.S. Pat. No 2927014 discloses phosphonates and phosphinates having herbicidal activity. We have now found that combinations of certain alkyl substituted phosphonates and phosphinates according to the U.S. Patent with certain known sugar beet herbicides are surprisingly beneficial and synergistic.
DESCRIPTION
In one aspect, the invention provides a herbicidal composition comprising: ##STR2## where R and R.sup.1, which may be the same or different, each represent straight or branch-chained alkyl of 1 to 12 carbon atoms, and x and y are each 1 or 2, the sum of x and y being-3; and metamitron, lenacil, ethofumesate and chloridazon, or a combination of 2 and more comprises applying to a locus infested or liable to be infested therewith, an effective amount of the two components (a) and (b).
Preferred compounds of formula I are those wherein R and R.sup.l each represent 2-ethylhexyl or dodecyl, especially 0,0-bis(2-ethylhexyl) (2-ethylhexyl) phosphonate.
The ratio by weight of (a) to (b) employed is preferably from 10:1 to 1:10, especially from 5:1 to 1:5.
The compositions of the invention are herbicidally-active against a wide range of broad-leaved and grass weeds, including Alopecurus, Echinochloa, Setaria, Amaranthus, Atriplex, Centaurea, Galium, Matricaria, Mercurialis, Polygonum and Stellaria species, but are comparatively safe to certain crop species, particularly beets. They may thus be of use as herbicides, and especially as selective herbicides, particularly in the control of a range of weeds in such crops.
The compositions of the invention usually contain from 0.01 to 99% by weight of the present compounds, and are normally produced initially as concentrates containing from 0.5 to 99%, preferably from 0.5 to 85%, and especially from 10 to 50% by weight thereof. Such concentrates are diluted if necessary before application to the locus to be treated such that the active ingredient comprises from 0.01 to 5% by weight of the formulation applied.
The carrier may be water, in which case an organic solvent may also be present, though this is not usually employed. A flowable suspension concentrate may be formed by grinding the compound with water, a wetting agent and a suspending agent,e.g. xanthan gum.
The carrier may alternatively be a water immiscible organic Solvent, e.g. a hydrocarbon which boils within the range 130.degree.-270.degree. C., e.g. xylene, in which the compound is dissolved or suspended. An emulsifiable concentrate containing a water immiscible solvent may be formed with a surface active agent so that the concentrate acts as a self-emulsifiable oil on admixture with water.
The carrier may alternatively be a water-miscible organic solvent e.g. 2-methoxy ethanol, methanol, propylene glycol, diethylene glycol, diethylene glycol monoethyl ether, methylformamide or dimethylformamide.
The carrier may alternatively be a solid, which may be finely divided or granular. Examples of suitable solids are limestone, clays, sand, mica, chalk, attapulgite, diatomite, perlite, sepiolite, silicas, silicates, lignosulphonates and solid fertilizers. The carrier can be of natural or synthetic origin or can be modified natural material.
Wettable powders soluble or dispersible in water may be formed by admixing the compound in particulate form with a particulate carrier or spraying molten compound on to the particulate carrier, admixing a wetting agent and a dispersing agent and finely grinding the whole powder mixture.
An aerosol composition may be formed by admixing the compound with a propellant, e.g. a polyhalogenated alkane such as dichlorofluoromethane, and suitably also with a solvent.
The term `surface active agent` is used in the broad sense to include materials variously called emulsifying agents, dispersing agents and wetting agents. Such agents are well known in the art.
The surface active agents used may comprise anionic surface active agents, for example mono- or di-esters of phosphoric acid with a f
REFERENCES:
patent: 2927014 (1960-03-01), Goyette
Bembenick B.
Raymond Richard L.
Schering Aktiengesellschaft
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