DE3035203A1 - Fungicidal cereal seed dressing - contg. a combination of thiabendazole, maneb and quintozen - Google Patents

Abstract

New fungicide combinations for the treatment of cereal seed contain (A) 3-30 wt. pts. thiabendazole (I), (B) 10-50 wt. pts. maneb (II) and (C) 20-20 wt. pts. quintozen (III). The combinations can be formulated as dry dressings, liq. dressings and slurries. A pref. dry formulation contains 20-95 (pref. 40-60) wt.% active substance and 5-80 wt.% fillers and/or adjuvants. Pref. liq. formulations contain 15-60 (pref. 20-40) wt.% active substance and 40-85 wt.% solvent and opt. filters. Used for cereal seed dressing for protecting e.g. wheat, rye and oats against attack by fungi e.g. Tilletiatritici, Ustilagotritici, Ustilagoavenae and Fusarium nivale.

Description

Fungicide combination

The invention relates to a fungicide combination for the treatment of Cereal seeds.

To combat seed-borne and partly soil-borne cereal diseases So far, pickling agents containing mercury have mainly been used. This means mostly have a relatively broad spectrum of activity. Disadvantage of such Pickling, however, is its high toxicity which has even led to efforts at this No longer admit funds.

In addition, universal pickling agents that were already free of mercury were also used which developed more or less the full spectrum of seed-borne diseases fight. These are preparations that have several active ingredients in however mostly contain a very expensive combination. However, this is often the case in practice the universal effect of a pickling agent is not required at all, were also special preparations with a specific area of application have already been developed.

The object of the invention was to provide a mercury-free special pickling agent to introduce all important pathogens in wheat, rye and oat seeds recorded in sufficient effect.

Another object of the invention was to find a new fungicide combination to find the resistance formation often observed in the field of fungal diseases to prevent.

It has now been found that the combination of the active ingredients thiabendazole, Maneb and Quintozen meet the above-mentioned task.

The individual active ingredients mentioned above are already known per se. Surprisingly, the combination according to the invention leads the Active ingredients do not develop resistance, as is the case with the known benzimidazoles, which, in principle, would also include thiabendazole, was observed.

The invention relates to a fungicide combination for the treatment of cereal seeds, containing 3 to 30 parts by weight of thiabendazole 10 to 50 parts by weight of maneb 2 to 20 parts by weight quinto The combination preferably contains 15 to 20 parts by weight of thiabendazole, 20 to 30 parts by weight of maneb and 8 to 10 parts by weight of quintozene.

The combination according to the invention can be used as a dry stain or liquid stain and can also be formulated as a slurry pickle.

A preferred formulation as dry substance consists of 20 to 95% by weight of the active components and 5 to 80% by weight fillers and / or auxiliaries. Advantageously, the amount of active components is often 40 to 60% by weight the total stain.

Calcium carbonate, talc, kaolin, etc. can be used as fillers Silicates, precipitated silica and their mixtures are mentioned.

Auxiliaries are e.g. oils, anticaking agents, dyes, emulsifiers and wetting agents. To avoid the generation of dust, the formulation often includes 0.5 to 2.5% by weight of an oily component1 such as paraffin oil or an organic oil1 Origin, such as

Castor oil or soybean oil, or a high-boiling alcohol, e.g. Ethylhexanol or glycerin, added. Furthermore, additives can be used to improve the Pourability (anti-caking agent), e.g.

Contains highly disperse silica, in amounts from 0.1 to 1% by weight be.

In addition to the auxiliaries and fillers, slurry pickles contain the dry stain water and possibly thickener, e.g.

Polyvinyl alcohol or dextrin. The use of wetting agents and emulsifiers is mandatory for slurry pickling and is generally 1 to 10% by weight, related on dry matter.

The components of dry pickling and slurry pickling (without water) are mixed and brought to a uniform grain size of generally 5 to 30 u ground. The oily additives are then usually sprayed in with mixing.

Liquid stains preferably consist of 15 to 60% by weight of fungicidal active ingredients and 40 to 85% by weight of solvent and optionally filler.

20 to 40% by weight of a fungicidal active ingredient combination are particularly advantageous.

Examples of solvents are: Dimethylformamide, N-methylpyrrolidone, glycol, dimethyl sulfoxide, cyclohexanone and their mixtures.

Auxiliaries are e.g. dyes, emulsifiers and wetting agents.

The fungicide combination according to the invention is used primarily for control seed and soil borne diseases used in wheat, rye and oats.

Examples of effects are Tilletia tritici, Ustilago tritici, Fusarium nivale, Ustilago avenae et al.

A reasonable application rate has proven to be 20 to 200 g, based on active Amount of fungicidal active ingredient, proven per 100 kg of seeds.

The fungicide combination according to the invention is usually used by intensively mixing the formulated fungicide combination with the seeds. Commercially available pickling machines can be used for this, such as pickling drums or spray equipment.

The minimum effectiveness that a pickling agent must produce is for the approval required in the Federal Republic of Germany and in the guidelines of the Federal Biological Institute.

The effectiveness of the agent must generally be 95% kill of the pathogen compared to an untreated control. For the fight of Tilletia tritici an efficiency of 99.5 9 'is required Fungicide combination meets the above requirements. Furthermore shows they have a pronounced tolerance behavior towards the plant to be treated Good and often proves to be superior to corresponding ones in this aspect Wewgleichspr2paraten The agents according to the invention are also distinguished by their physiological harmlessness to higher living beings the The invention will now be explained in more detail by means of examples: Example 1 Production a dry stain The starting products Maneb, Thiabendazol Quintozen, calcium carbonate as well as dye and wetting agent are in a known manner with an air jet mill brought to a grain size of an average of 8 ji and put in a plow shovel mixer mixed.

During the mixing process, a paraffin oil is sprayed in at 20 atmospheres. The mixture obtained in this way is used in the following formulation for subsequently Dry dressing described used: 60% by weight of active ingredient combination 35 % By weight calcium carbonate 2% by weight dye 2% by weight wetting agent 1% by weight paraffin oil.

Example 2 Dressing of the grain samples with dry dressing agent 500 g Cereal grains are placed in a coating drum of 5 1 content with the in table 1 added amounts of the seed dressing formulation and 10 minutes to uniform distribution of the pickling powder mixed. The dressed seeds are in Paper bags filled and kept until sowing.

Experimental facility for field trials: the pickled cereal grains of wheat and oats are becoming common practice in the field in plots of 4 x 2.5 m Sown points in time. The evaluation of the experiment and the determination of the percentage Effectiveness is based on the guidelines of the Federal Biological Institute.

Test facility for laboratory testing: the effectiveness against Fusarium nivale on, rye with the fungicide combination according to the invention is tested in a laboratory determined according to the guidelines of the Federal Biological Institute for "pot tests".

Table 1 Amount of active ingredient in g / 100 kg of seeds Effectiveness in% against Tilletia Ustilago Ustilago Fusarium Maneb Thiabendazol Quintozen tritici tritici avenae nivale 90 60 30 100 95.1 100 100 70 60 50 100 91.0 100 99.2 95 60 45 100 95.5 100 100 90 55 35 100 94.0 100 99.0 Example 3 Efficacy against Ustilago avenae in the field test The test is carried out according to the guidelines of the Federal Biological Institute: 2 On a parcel size of 5 m each, 75 g of artificially infected oat kernels (according to the Thiede method) treated with the appropriate amount of dressing were sown in 4 repetitions .

Finally, at the time of the emergence of the panicles, the grown up Plants examined for infestation and their number determined.

A 60% by weight of active substances was used as the fungicide combination according to the invention containing mordant with a weight ratio of maneb: thiabendazole: quintozen equal to 3: 2: 1 used. The commercially available active ingredient was used as the comparative preparation Carbendazim used.

The results were also obtained with an unstained, otherwise the same treated blank compared.

The results are shown in Table 2.

The results demonstrate the pronounced tolerance behavior of the invention Fungicide combination with 100% fungicidal effectiveness.

Table 2 Number of plants as the sum of 4 repetitions applied Efficiency in g / 100 kg of seeds healthy sick in% Maneb + Thiabendazole + Quintozen 300 5313 0 100 Carbendazim 100 4755 0 100 unpickled blank sample 0 4386 543 -

Claims (1)

Patent claim fungicide combination for the treatment of cereal seeds 7 containing 3 to 30 parts by weight of thiabendazole 10 to 50 parts by weight of maneb 2 to 20 parts by weight quinto.