DD298472A5 - MEANS FOR CONTROLLING PHYTOPATHOGENOUS MUSHROOMS - Google Patents

Abstract

The invention relates to compositions for combating phytopathogenic fungi containing combinations of the * or their morpholinium compounds with the active ingredient iminoctadine triacetate in the ratio 10: 1 to 1:10. {Fungicide; Combination; morpholines; morpholinium; Cultivated}

Description

₃ HU) (IV) ^N CH ₃

in which R ^{1 is} long-chain alkyl (C ₁₀ -C ₁₈ ; straight, branched or cyclic), R ^{2 is} lower alkyl and χ is the anion of an inorganic salt, and (B) iminoctadine triacetate

and customary formulation auxiliaries or mixtures thereof.

2. Composition according to item 1, characterized in that the combination of components A and B in the ratio 10: 1 to 1:10 takes place.

3. Composition according to item 1 and 2, characterized in that the combination of components A and B takes place either as a partner in formulations or tank mixes.

4. Composition according to item 1 to 3, characterized in that the combination components A and B contain between 0.1 and 98 wt .-%.

5. A method for controlling phytopathogenic fungi, characterized in that the combinations of components A and B according to Pkt. 1 to 4 on phytopathogenic fungi or their habitat with application rates of 0.1 to 2.0 kg of active ingredients / ha are used.

Field of application of the invention

The invention relates to a combination of fungicides, which has an improved effect with simultaneous expansion of the activity spectrum, and their use in crop protection.

Characteristic of the known technical solutions

Fungal diseases of crop plants still cause high losses despite the introduction of highly effective, mostly systemic fungicides. One of the causes is the inadequate effect of the fungicides on important pathogens, which due to their biology are difficult to combat. Another essential critical aspect of the use of fungicides is their limited spectrum of activity, especially in those cases in which multiple-acting fungicides or suitable combinations could prevent multiple gangrene.

N-alkylmorpholines are known as fungicides of great practical importance (DE 1164152, DE 1198125: DE 140412), but there is a disadvantage of this group of active substances in their narrow spectrum of activity, which limits the use primarily to the control of powdery mildew, and in their often phytotoxic side effects.

Iminoctadin triacetate is resistant to a number of important plant pathogens, e.g. B. Septoria nodorum, Venturia iraequalis and Fusarium spp., Good effect, however, an increase in activity against such relatively difficult to control pathogens is desired.

Object of the invention

The object of the invention is to develop new more effective means of controlling phytopaths of those fungi having improved utility properties.

Presentation of the essence of the invention

The invention has for its object to seek by the use of known active ingredients on the basis of N-alkylmorpholines and guazatine agents with improved activity at broadened spectrum of activity, reduced rates and reduced phytotoxicity. According to the invention the object is achieved in that in active ingredient combinations usual formulation - active ingredients (component A) consisting of

N-alkyl-2,6-dimethylmorphoiinen of the general formula I or a combination with their positional isomers N-alkyl-2,5-dimethvlmorpholinen of the general formula II

C; ν ^H 3 ^C ^,

ON-R 0 N-R

R, C (I) HD ^N CH ₃

'3

in which R is long-chain alkyl (C ₁₀ -C ₁ S, straight, branched or cyclic) and / or morpholinium compounds of the general formula III or a combination with their positional isomers of the general formula IV,

H ₃ C

⁰ R ¹

(IV) ^N CH ₃

in which R ^{1 is} long-chain alkyl (C ₁₀ -C ₈ , straight, branched or cyclic), R ^{2 is} lower alkyl and χ the anion of a

mean inorganic acid, and - iminoctadine triacetate (component B)

come into use.

Surprisingly, an increase in the fungicidal action based on a synergistic effect was found, which makes it possible to reduce the application rates while improving the initial action. A further advantage is that reduces the use of morpholins relatively high risk of phytotoxic effects by reducing the application rate and thus the insertion options are extended.

Particular advantages in the application of the inventive compositions arise, due to reduced drug application rates, from a lower environmental impact and reduced residue levels in the crop. Thus, the agents according to the invention represent a further development of the prior art. The advantageous effect of these compositions according to the invention can be achieved if the use of component A 'component B takes place in a ratio of 10: 1 to 1:10. To achieve a beneficial effect for the practice, components A and B can be used either as combination partners in formulations or in tank mixes.

embodiments

The chosen embodiments are intended to illustrate the invention without limiting it.

example 1

Winter wheat of the "Alcedo" variety was grown under greenhouse conditions and treated at the one-leaf stage with the mixture of the invention and comparative fungicides. After the spray coatings had dried on, they were inoculated with a spore suspension of Seotoria nodorum. The evaluation was carried out after 10 days by determining the infection rate. Table 1 shows the fungicidal efficiency.

variant application effect concentration Degree ppm (%) Imlnoctadintriacetat 10 52 iminoctadine triacetate 5 - iminoctadine triacetate 1 32 aldimorph 10 24 aldimorph 5 - iminoctadine triacetate 10 + 90 + Aldimorph 10 iminoctadine triacetate 5 + 96 + Aldimorph 5 iminoctadine triacetate 1 + 60 + Aldimoiph 1

Example 2

Winter wheat of the variety "Alcedo" was sown on 19.10.1987 on the trial field (parcel trial). In severe natural infestation with Septcria nodorum (in the development stage DC61 ... 69) on 07.07.1988 treatment with the mixture according to the invention and comparison fungicides took place. The fungicidal activity is shown in Table 2. The fungicidal efficiency was determined from the score on the degree of infestation.

Table 2

variant expenditure infestation effect amount Degree Degree (1 / ha) (%) (%) control _ 74.0 _ propiconazole 0,125 44.0 40.5 iminoctadine triacetate 0.5 42.5 42.6 iminoctadine triacetate 0.5 + 32.5 56.1 + Aldimoiph 0.4 »

The effect of aldimorph on Septoria nodorum under Praxlsbedingu.igan is <10%.

Claims (1)

1. A composition for controlling phytopathogenic fungi, characterized in that they are active as a combination of (A) N-alkyl-2,6-dimethylmorpholines of the general formula I or a combination with their positional isomers N-alkyl-2,5-dimethylmorpholines of the general formula II ^S CH ₃ where R long chain alkyl (C _l0-C18; straight, branched, cyclic, odor) means and / or the general Morpholiniurnverbindungen formol III or a combination with their position isomers of the general formula IV H ₃ Cv _V _ H ₃ Cs