DD293041A5 - AGENTS FOR FISHING AGRICULTURAL AND GAERTNER RESOURCES, PREFERABLY POTATOES - Google Patents

Abstract

The invention relates to means for dressing of agricultural and agricultural crops, preferably of roots and tubers, in particular of potatoes, in order to reduce losses due to parasitic diseases during storage. According to the invention, in addition to the known excipients and carriers, they also contain as active substance one or both copper complexes of the formula in which R1 represents CSNHC6H5 and R2 represents CH3 or R1 represents CSNHC6H5 and R2 represents CH2SCH3. formula

Description

inderfür

R ₁ -CSNH-C ₆ H ₆ and R ₂ -CH ₃ (I) or

R _{1 is} -CSNH-C ₆ H ₆ and R _{2 is} -CH ₂ SCH ₃ (II),

used in the usual formulation for pickling. The inventive use of agents containing one or both compounds (I) and (II), especially of (II), causes a surprising bactericidal effect, which, together with the already known fungicidal effect, the losses due to parasitic diseases of the crop during the storage lowers. This interaction of the substances on fungi and parasitic bacteria is apparently the basis of the special effect.

Since the o.g. Copper complexes of reaction products of the underlying α-amino acids with aliphatic or aromatic Isothiozyanaten natural substance character, there are no fundamental concerns, their use for toxicological reasons to limit the dressing of plant matter.

For the application of the agent is usually in procedures and appropriate for the dressing formulations, such as wettable powders or aqueous suspension concentrates. The application is carried out in a known manner, preferably immediately after harvest in the dip or Schlämmbeizverfahren or spray or Feinsprühverfahren. The advantageous effect of the dressing according to the invention is achieved with the use of 1.5 g to 1.5 kg of active ingredient / t of crop, in potatoes, preferably in uses of 3 g to 100 g of active ingredient / t.

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

embodiments example 1

Effect of the agents (I) and (M) according to the invention on the bacterial wet rot on potato tubers (Erwiniaspp.). Potato tubers of the variety "Adretta" were washed, injured, treated with the agent (I) and (II) according to the invention and inoculated after drying of the mordant coating with Naßfäuleerregern (3x 10 ⁷ bacteria / ml of Erwinia carotovora var. Atroseptica). After 14 days the infestation was assessed. For comparison, a known preparation was used.

Comparison table on the effectiveness of preparations

Efficiency%

62.5 55.9 31.4 .... -

Laboratory experiment with 4 x 50 infection sites / variant

Example 2

Effect of the agents (I) and (II) on the brown rot on potato tubers (Phytophthora infestans) Potato slices of the "Adretta" variety were inoculated with a phytophthoraine festans zoosporene / sporangia suspension and treated with the agents (I) and (4) four hours thereafter. II). After 20 days, the infestation was assessed by cutting the potato slices. Metalaxyl, which contains methyl D, L-N- (2,6-dimethylphenyl) -N- (2-methoxyacetyl) alaninate as the active ingredient, was used as the comparison agent.

variant 7.5 g / t Degree of involvement% 7.5 g / t 30.6 1 untreated control 11.5 2 Falisolan 200 g / t 13.5 3 (II) 21.0 4 (I)

variant 7.5 g / t Number of brown rot 15.0 g / t Tuber discs in% 30.0 g / t (n = 50) 7.5 g / t 100 15.0 g / t 0 30.0 g / t 0 1 untreated control 23 2 metalaxyl 7.5 g / t 8th 3 (II) 10 4 (II) 14 5 (II) 13 6 (I) 7 (I) 8 (I)

Claims (1)

Agent for dressing of agricultural and horticultural crop, preferably of roots and tubers, in particular of potatoes, characterized in that they contain, in addition to known excipients and carriers as active ingredient one or both copper complexes of the formula in which R ₁ -CSNH-C ₆ H ₅ and R ₂ -CH ₃ or
R ₁ -CSNH-C ₆ H ₅ and R ₂ -CH ₂ SCH ₃
represent. For this 1 page formula Field of application of the invention The invention relates to means for dressing agricultural and horticultural crop, preferably of potatoes, in order to reduce losses due to parasitic diseases during storage and their application. Characteristic of the known state of the art Harvested agricultural and horticultural crops, preferably of fruit and root vegetables, roots and tubers such as potatoes, is exposed during storage the infestation of fungal and bacterial pathogens, which can lead to high losses depending on the harvesting and storage conditions. In particular, increasing crop mechanization often results in a high level of damage, which is the portal of entry for various pathogens. For the chemical control of these pests, the development of pickling methods has been developed, especially for the cultivation of seed potatoes by Burth et al. is reported (Nachr. Plant protection GDR, 36, [1982], pp. 10-13). For Beizung known fungicides such. As benzimidazole derivatives or others often in combination with bactericides such as chloramphenicol, proposed (DD 78423,84958,107204,110423,130427,133885,218262). For toxicological reasons, so far a dressing has only been made on seed potatoes. For food and industrial potatoes as well as for fruit and root vegetables, no solutions for the chemical control of parasitic diseases during storage by pickling have yet been established. In addition to the toxicological concerns liable beyond the known means the permanent risk that develop resistant pest breeds, so that there is an urgent need for new drug groups for the dressing of crops. Another disadvantage of the known mordant is the gap in the action against the causative agent of the brown rot Phytophthora infestans. Although a drug is known against brown rot, but are simultaneously promoted by this Fusarium Trockenfäulen so that it is only used in combination with benzimidazoles. The drug classes used are very much endangered by resistance developments and can therefore only be used to a limited extent. It is also known that copper complexes of reaction products of α-amino acids with aliphatic or aromatic Isothiozyanaten have fungicidal effects (DD 246247). It can not be assumed that a compound known as a fungicide comes into question from the outset as a mordant for the plant roots and tubers mentioned above. Rather, they must, as already stated, meet special conditions that are unpredictable. Object of the invention The aim of the invention is to find means for dressing agricultural and horticultural crop, preferably for fruit and root vegetables, roots and tubers such as potatoes, which allow a wide use and do not have the disadvantages of known pickling result. Explanation of the essence of the invention The invention has for its object to find the composition or chemical constitution of such agents and their conditions of use. According to the invention the object is achieved in that for the dressing of fruit and root vegetables, roots and tubers, such as potatoes, compositions containing copper complexes of reaction products of certain α-amino acids with aliphatic or aromatic Isothiozyanaten the general formula ₍ O = C ^ Cu / 2 Η-C- __ _Ν ' I Ri Ro H