Plant protecting and regulating compositions – Plant growth regulating compositions
Reexamination Certificate
2000-01-18
2002-05-07
Carr, Deborah D. (Department: 1621)
Plant protecting and regulating compositions
Plant growth regulating compositions
C568S333000, C504S348000
Reexamination Certificate
active
06383984
ABSTRACT:
BACKGROUND OF THE INVENTION
This invention concerns an aqueous, storage stable suspension concentrate (SC) for crop protection active compounds, a method for the manufacture of such suspensions, and their use for combating pests.
As a rule inert ingredients must be used to bring crop protection active compounds, for example fungicidal compounds, into such a form that the user can apply them either as such or after dilution with water. The correct choice of suitable inert ingredients for the formulation often determines to a significant extent whether the active ingredient can display its full efficacy after application. When selecting suitable ingredients to insure the physicochemical stability of the formulation, it must be taken into account that not every active ingredient can be processed into any given formulation type without losses in stability and/or efficacy.
The efficacy of the active components can often be improved by addition of other ingredients such as adjuvants. An adjuvant is defined here as a substance which can increase the biological activity of an active ingredient but is not itself significantly biologically active. The adjuvant can either be included in the formulation or can be added to the spray tank together with the formulation containing the active ingredient. In view of an easy and safe handling and dosing of these adjuvants by the end-user and in view of avoiding unnecessary packing material, it is desirable to develop concentrated formulations which already contain such adjuvants.
SUMMARY OF THE INVENTION
The present invention relates to an aqueous, concentrated suspension (SC) for crop protection active compounds which comprises
(a) 50 to 400 g/L of at least one crop protection active compound;
(b) 50 to 500 g/L of at least one adjuvant, which has the capability of reducing the surface tension in the spray dilution to 40 mN/m or lower and does not significantly promote the particle growth of the crop protection active compound in the stored SC;
(c) at least one surfactant selected from the groups (c1) and (c2):
(c1) 5 to 75 g/L of one or more non-ionic dispersants, and
(c2) 10 to 100 g/L of one or more anionic dispersants,
(d) up to 150 g/l of one or more anti-freezing agents,
(e) up to 25 g/L of one or more defoamers,
(f) up to 25 g/L of one or more preservative, and
(g) 200 to 800 g/L of water,
wherein the adjuvant (b) is selected from the group consisting of amine alkoxylates, polyoxyalkylene triglycerides, alkylpolyglycosides, alkenyl succinic anhydride derivatives, polyvinylpyrrolidones, perfluoroalkyl acids derivatives, mixtures thereof and mixtures with diluents. Another aspect of the present invention is a process for the preparation of such a SC which comprises
(1) air-milling of 50 to 400 g/L of one or more crop protection active compounds (a) optionally in the presence of one or more anionic dispersants (c2), and/or a milling aid such as kaolin or silica, and
(2) mixing all the components (a) to (g) in a dissolver.
Furthermore, the invention relates to a method for the control of pests at a locus which comprises diluting a SC according to the invention with water and treating the said locus with the obtained diluted formulation.
Those and other objects and features of the invention will become more apparent from the detailed description set forth hereinbelow.
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS
It has now been found that, surprisingly, stable aqueous SC formulation comprising one or more crop protection active compounds (a) and one or more adjuvants (b) in combination with one or more non-ionic dispersants (c1) and/or one or more anionic dispersants (c2) and can be prepared.
The biological activity of the active ingredients (a) can be increased by including the adjuvants (b) in the spray dilution or directly in the formulation. However, according to the present invention the adjuvants (b) are incorporated into the concentrated formulation.
The term pests as used hereinabove and hereinbelow includes but is not limited to plant pathogens, insects and weeds.
In principle all crop protection active compounds can be used for the non-aqueous concentrated suspensions according to the invention. However, solid crop protection active compounds are preferred.
As a rule solid crop protection active compounds are used which have a low solubility in water. A solubility of less than 10 g/L, in particular less than 5 g/L in water is preferred.
The compositions of this invention can be applied to the plants or their environment with other active substances. These active substances (a) can be either fertilizers or agents which donate trace elements or other preparations which influence plant growth. However, they can also be selective herbicides, insecticides, fungicides, bactericides, nematicides, algicides, molluscicides, rodenticides, virucides, compounds inducing resistance into plants, biological control agents such as viruses, bacteria, nematodes, fungi and other microorganisms, repellents of birds and animals, and plant growth regulators, or mixtures of several of these preparations.
The active ingredients, which are provided in the form of the aqueous SC formulation according to the invention, include all suitable biologically active compounds for plant protection, preferably fungicides, herbicides, insecticides, acaricides, nematicides and repellents, in particular fungicides. Active ingredients which are solid at room temperature are preferred, in particular those with a melting point of higher than 50° C.
Mixtures of different biologically active compounds can have a broader spectrum of activity than a single compound alone. Furthermore, these can exhibit a synergistic effect compared with the single active ingredients. In a preferred embodiment, the formulation of the present invention can be used with a mixture of active ingredients, in the case of mixtures one of the active ingredients can be dissolved in the continuous phase of the SC formulation according to the invention.
Preferred fungicides for use in the compositions of the present invention are the commercially available compounds selected from the group consisting of:
AC 382042, anilazine, azoxystrobin, benalaxyl, benomyl, binapacryl, bitertanol, blasticidin S, Bordeaux mixture, bromuconazole, bupirimate, captafol, captan, carbendazim, carboxin, carpropamid, chlorbenzthiazon, chlorothalonil, chlozolinate, copper-containing compounds such as copper oxychloride, and copper sulfate, cycloheximide, cymoxanil, cypofuram, cyproconazole, cyprodinil, dichlofluanid, dichlone, dichloran, diclobutrazol, diclocymet, diclomezine, diethofencarb, difenoconazole, diflumetorim, dimethirimol, dimethomorph, diniconazole, dinocap, ditalimfos, dithianon, dodemorph, dodine, edifenphos, epoxiconazole, etaconazole, ethirimol, etridiazole, famoxadone, fenapanil, fenamidone, fenarimol, fenbuconazole, fenfuram, fenhexamid, fenpiclonil, fenpropidin, fenpropimorph, fentin, fentin acetate, fentin hydroxide, ferimzone, fluazinam, fludioxonil, flumetover, fluquinconazole, flusilazole, flusulfamide, flutolanil, flutriafol, folpet, fosetyl-aluminium, fuberidazole, furalaxyl, furametpyr, guazatine, hexaconazole, IKF-916, imazalil, iminoctadine, ipconazole, iprodione, isoprothiolane, iprovalicarb, kasugamycin, KH-7281, kitazin P, kresoxim-methyl, mancozeb, maneb, mepanipyrim, mepronil, metalaxyl, metconazole, methfuroxam, MON 65500, myclobutanil, neoasozin, nickel dimethyidithiocarbamate, nitrothalisopropyl, nuarimol, ofurace, organo mercury compounds, oxadixyl, oxycarboxin, penconazole, pencycuron, phenazineoxide, phthalide, polyoxin D, polyram, probenazole, prochloraz, procymidione, propamocarb, propiconazole, propineb, pyrazophos, pyrifenox, pyrimethanil, pyroquilon, pyroxyfur, quinomethionate, quinoxyfen, quintozene, spiroxamine, SSF-126, SSF-129, streptomycin, sulfur, tebuconazole, tecloftalame, tecnazene, tetraconazole, thiabendazole, thifluzamide, thiophanate-methyl, thiram, tolclofosmethyl, tolylfluanid, triadimefon, triadimenol, triazbutil, triazoxide, tricyclazole, tridemorph, trifloxystrob
BASF - Aktiengesellschaft
Carr Deborah D.
Costello Charles F.
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