Drug – bio-affecting and body treating compositions – Inorganic active ingredient containing – Phosphorus or phosphorus compound
Patent
1994-06-24
1997-10-07
Burn, Brian M.
Drug, bio-affecting and body treating compositions
Inorganic active ingredient containing
Phosphorus or phosphorus compound
A01N 4338
Patent
active
056745362
DESCRIPTION:
BRIEF SUMMARY
FIELD OF THE INVENTION
The invention relates to fungicide compositions having a combination of active substances based on phosphites for the prophylactic and acute treatment of fungus diseases of plants, in particular in vineyards and in the cultivation of fruit, arable land, vegetables and hops and of ornamental plants.
BACKGROUND OF THE INVENTION
For the control of fungus diseases in plants it is known to use derivatives of phosphorous acid as well as conservative toxic active substances such as copper, which accumulates in the ground and sulphur. These refer to anorganic and organic salts, of which the latter are available in the form of alkyl compounds or esters of phosphorous acid. A disadvantage of organic phosphite compounds is that these can also be injurous usually to human beings, animals, plants and micro-organisms and can pollute the environment to a serious degree. For prophylactic protection of plants such as roses, ornamental plants or cucumbers against powdery mildew (oidium), a preparation with the active substance lecithin is available commercially. For prophylactic treatment of fungus diseases in fruit orchards and vineyards, the active substance soda waterglass is commercially available. Disadvantages of the above-mentioned active substances are that they are only prophylactically effective in a limited application range. In addition, a disadvantage of waterglass is that it is only sufficiently prophylactically effective in a relatively high concentration and must be applied with care because of its high basicity.
Accordingly, spraying may not be carried out during sunshine, otherwise burning may occur. Further, the waiting period is three weeks.
SUMMARY OF THE INVENTION
It has now been found that a surprisingly high synergistic fungicide effect can be achieved through a combination of an anorganic phosphite with further active substances as defined in claim 1.
The subject matter of the present invention is therefore a fungicide composition made from several active substances whereby one active substance is a phosphite characterized in that the composition includes a combination of active substances from at least one phosphite selected from the group K.sub.2 HPO.sub.3, KH.sub.2 PO.sub.3, Na.sub.2 HPO.sub.3 and NaH.sub.2 PO.sub.3, lecithin and at least one compound selected from sodium metasilicate and soda waterglass.
A further subject matter of the invention is a method of applying the above-mentioned fungicide compositions.
BRIEF DESCRIPTION OF THE DRAWING
FIG. 1 is a top view of test plots.
DETAILED DESCRIPTION OF THE INVENTION
As is shown by the embodiments, the compositions in accordance with the invention produce their effect not only prophylactically against fungus attack/infestation, but also by acute fungus infestation, in particular against peronospora and powdery mildew (oidium).
As well as the high effectivity compared with previously known fungicides, the compositions in accordance with the invention demonstrate an excellent environmental compatibility with respect to human beings, animals, plants and micro-organisms.
Methods of manufacturing potassium and sodium phosphites for control of fungus diseases are state of the art and are known to persons skilled in this art.
In a preferred embodiment of the invention the potassium and/or sodium phosphite is used in the composition in the form of a solution. This phosphite solution is preferably manufactured in such a way by mixing phosphorous acid with solid potassium or sodium hydroxide or potassium or sodium hydroxide solution so that a pH value of 5 to 7, preferably about 6 is achieved. This solution, the so-called spraying preparation, serves as the initial solution for the manufacture of a spraying liquor. For this purpose, the above-mentioned solution is preferably diluted with water in the proportion of about 1 to 100. This spraying liquor has preferably a concentration of 0.05-0.1% by weight of phosphite, in particular 0.07-0.09% by weight and 0.075-0.08% by weight is particularly preferred, whereby these va
REFERENCES:
patent: 4075324 (1978-02-01), Thizy et al.
patent: 4119724 (1978-10-01), Thizy et al.
patent: 4139616 (1979-02-01), Ducret et al.
patent: 4849219 (1989-07-01), Staub et al.
Database WPIL, An 91-219264 and JP-A 3141206 see abstract Oct. 1989.
Database WPIL An 85-226607 and Jp-A 60 146 808 see abstract D.E.H. Frear "Chemistry of Insecticides, Fungicides and Herbicides" Aug. 1985.
Burkhart Alexander
Burkhart Mario
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