Fungicidal mixtures

Details Fungicidal mixtures Fungicidal mixtures

2000-10-31

2001-05-29

Robinson, Allen J. (Department: 1616)

Drug, bio-affecting and body treating compositions

Designated organic active ingredient containing

Having -c-, wherein x is chalcogen, bonded directly to...

C514S407000, C514S528000

Reexamination Certificate

active

06239158

ABSTRACT:

The present invention relates to a fungicidal mixture which comprises
a) a carbamate of the formula I
 where X is CH or N, n is 0, 1 or 2 and R is halogen, C
1
-C
4
-alkyl or C
1
-C
4
-haloalkyl, it being possible for the radicals R to be different if n is 2, and
b) a dithiocarbamate (II) selected from the group consisting of
manganese ethylenebis(dithiocarbamate) (zinc complex) (IIa),
manganese ethylenebis(dithiocarbamate) (IIb),
zinc ammoniate ethylenebis(dithiocarbamate) (IIc) and
zinc ethylenebis(dithiocarbamate) (IId), and/or
c) 1-(2-cyano-2-methoxyiminoacetyl)-3-ethylurea (III)
H
3
CCH
2
—NHCONH—C(CN)═NOCH
3
  III
 in a synergistically active amount.
Moreover, the invention relates to methods of controlling harmful fungi using mixtures of the compounds I, II and/or III and to the use of the compounds I, II and/or III for the preparation of such mixtures.
The compounds of the formula I, their preparation and their action against harmful fungi are known from the literature (WO-A 96/01,256 and WO-A 96/01,258).
Also known are the dithiocarbamates II (IIa: common name: mancozeb, U.S. Pat. No. 3,379,610; IIb: common name: maneb, U.S. Pat. No. 2,504,404; IIc: former common name: metiram, U.S. Pat. No. 3,248,400; IId: common name: zineb, U.S. Pat. No. 2,457,674), their preparation, and their action against harmful fungi.
Also known is the compound III (U.S. Pat. No. 3,957,847; common name: cymoxanil), its preparation, and its action against harmful fungi.
It is an object of the present invention to provide mixtures which have an improved action against harmful fungi combined with a reduced total amount of active ingredients applied (synergistic mixtures), with a view to reducing the rates of application and to improving the spectrum of action of the known compounds.
We have found that this object is achieved by the mixtures defined at the outset. Moreover, we have found that better control of harmful fungi is possible by applying the compound I, II and/or III simultaneously together or separately or by applying the compounds I, II and/or III in succession than when the individual compounds are used.
Mixtures of I and II or I and III and also mixtures comprising I, II and III are suitable for this purpose.
Formula I represents in particular carbamates where the combination of substituents corresponds to a line in the table below:
No.
T
R
n
I.1
N
2-F
I.2
N
3-F
I.3
N
4-F
I.4
N
2-Cl
I.5
N
3-Cl
I.6
N
4-Cl
I.7
N
2-Br
I.8
N
3-Br
I.9
N
4-Br
I.10
N
2-CH
3
I.11
N
3-CH
3
I.12
N
4-CH
3
I.13
N
2-CH
2
CH
3
I.14
N
3-CH
2
CH
3
I.15
N
4-CH
2
CH
3
I.16
N
2-CH(CH
3
)
2
I.17
N
3-CH(CH
3
)
2
I.18
N
4-CH(CH
3
)
2
I.19
N
2-CF
3
I.20
N
3-CF
3
I.21
N
4-CF
3
I.22
N
2,4-F
2
I.23
N
2,4-Cl
2
I.24
N
3,4-Cl
2
I.25
N
2-Cl, 4-CH
3
I.26
N
3-Cl, 4-CH
3
I.27
CH
2-F
I.28
CH
3-F
I.29
CH
4-F
I.30
CH
2-Cl
I.31
CH
3-Cl
I.32
CH
4-Cl
I.33
CH
2-Br
I.34
CH
3-Br
I.35
CH
4-Br
I.36
CH
2-CH
3
I.37
CH
3-CH
3
I.38
CH
4-CH
3
I.39
CH
2-CH
2
CH
3
I.40
CH
3-CH
2
CH
3
I.41
CH
4-CH
2
CH
3
I.42
CH
2-CH(CH
3
)
2
I.43
CH
3-CH(CH
3
)
2
I.44
CH
4-CH(CH
3
)
2
I.45
CH
2-CF
3
I.46
CH
3-CF
3
I.47
CH
4-CF
3
I.48
CH
2,4-F
2
I.49
CH
2,4-Cl
2
I.50
CH
3,4-Cl
2
I.51
CH
2-Cl, 4-CH
3
I.52
CH
3-Cl, 4-CH
3
Particular preference is given to the compounds I.12, I.23, I.32 and I.38.
Due to their basic character, the compounds I and III are capable of forming salts or adducts with inorganic or organic acids or with metal ions.
Examples of inorganic acids are hydrohalic acids such as hydrofluoric acid, hydrochloric acid, hydrobromic acid and hydriodic acid, sulfuric acid, phosphoric acid and nitric acid.
Suitable organic acids are, for example, formic acid, carboxylic acid and alkanoic acids, such as acetic acid, trifluoroacetic acid, trichloroacetic acid and propionic acid, and also glycolic acid, thiocyanic acid, lactic acid, succinic acid, citric acid, benzoic acid, cinnamic acid, oxalic acid, alkylsulfonic acids (sulfonic acids having straight-chain or branched alkyl radicals of 1 to 20 carbon atoms), arylsulfonic acids or aryldisulfonic acids (aromatic radicals, such as phenyl and naphthyl, which have attached to them one or two sulfo groups), alkylphosphonic acids (phosphonic acids having straight-chain or branched alkyl radicals of 1 to 20 carbon atoms), arylphosphonic acids or aryldiphosphonic acids (aromatic radicals, such as phenyl and naphthyl, which have attached to them one or two phosphonic acid radicals), It being possible for the alkyl or aryl radicals to have attached to them further substituents, eg. p-toluenesulfonic acid, salicylic acid, p-aminosalicylic acid, 2-phenoxybenzoic acid, 2-acetoxybenzoic acid etc.
Suitable metal ions are, in particular, the ions of the elements of the second main group, in particular calcium and magnesium, of the third and fourth main group, in particular aluminum, tin and lead, and of the first to eighth sub-group, in particular chromium, manganese, iron, cobalt, nickel, copper, zinc and others. Especially preferred are the metal ions of the elements of the sub-groups of the fourth period. The metals can exist in the various valences which they can assume.
When preparing the mixtures, it is preferred to employ the pure active ingredients I and II and/or III, to which further ingredients active against harmful fungi or other pests, such as insects, arachnids or nematodes, or else herbicidal or growth-regulating active ingredients or fertilizers, can be admixed, if so required.
The mixtures of the compounds I, II and/or III, or the simultaneous joint or separate use of the compounds I, II and/or III, are/is notable for outstanding action against a wide spectrum of phytopathogenic fungi, in particular from the classes of the Ascomycetes, Deuteromycetes, Phycomycetes and Basidiomycetes. Some of them act systemically and can therefore be employed as foliar- and soil-acting fungicides.
They are especially important for controlling a large number of fungi in a variety of crop plants, such as cotton, vegetable species (eg. cucumbers, beans and cucurbits), barley, grass, oats, coffee, maize, fruit species, rice, rye, soya, grapevine, wheat, ornamentals, sugar cane, and a variety of seeds.
They are particularly suitable for controlling the following phytopathogenic fungi:
Erysiphe graminis
(powdery mildew) in cereals,
Erysiphe cichoracearum
and
Sphaerotheca fuliginea
in cucurbits,
Podosphaera leucotricha
in apples, Puccinia species in cereals, Rhizoctonia species in cotton, rice and lawns, Ustilago species in cereals and sugar cane,
Venturia inaequalis
(scab) in apples, Helminthosporium species in cereals,
Septoria nodorum
in wheat,
Botrytis cinerea
(gray mold) in strawberries, vegetables, ornamentals and grapevines,
Cercospora arachidicola
in groundnuts,
Pseudocercosporella herpotrichoides
in wheat and barley,
Pyricularia oryzae
in rice,
Phytophthora infestans
in potatoes and tomatoes, Pseudoperonospora species in cucurbits and hops,
Plasmopara viticola
in grapevines, Alternaria species in vegetables and fruit, and Fusarium and Verticillium species.
Furthermore, they can be used in the protection of materials (eg. in the protection of wood), for example against
Paecilomyces variotii.
The compounds I, II and/or III can be applied simultaneously together or separately or in succession, the sequence, in the case of separate application, generally not having any effect on the result of the control measures.
The compounds I and II are usually used in a weight ratio of 200:1 to 0.1:1, preferably 100:1 to 1:1, in particular 50:1 to 5:1 (II:I).
The compounds I and III are usually used in a weight ratio of 10:1 to 0.1:1, preferably 5:1 to 0.2:1, in particular 3:1 to 1:3 (III:I).
The application rates of the mixtures according to the invention are, in the case of the compounds I, in general from 0.005 to 0.5 kg/ha, preferably 0.01 to 0.5 kg/ha, in particular 0.01 to 0.3 kg/ha, depending on the nature of the desired effect.
In the case of the compounds II, the application rates are in general from 0.1 to 10 kg/ha, preferably 0.5 to 5 kg/ha, in particular 1 to 4 kg/ha.
In the c

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