CS198291B2 - Fungicide - Google Patents

Abstract

The fungicidal composition consists of a mixture of a triazole or pyrimidine compound with a benzimidazole compound or an aluminium salt of ethyl phosphite, optionally mixed with carriers, diluents or excipients. The compounds are suitable for the curative or preventive fungicidal treatment of vine downy mildew or cereal powdery mildew.

Description

The invention relates to a fungicidal composition.

The principle of the fungicidal composition according to the invention is that it contains, as one fungicidally active ingredient, a triazine compound of the formula I

and as a second fungicidally active ingredient benzimidazole of formula II (II) in combination with at least one inert, non-phytotoxic carrier, wherein the active ingredients I and II comprise 0.5 to 90% of the monohydric fungicidal composition and are present in a weight ratio of 2: 1 to 1:25 .

The above compounds are known and can be prepared by methods well known in the literature. Combinations of the active ingredients defined in the above formulation are novel and have been found to be surprisingly effective in controlling or preventing fungal infections of cultivated plants, wherein combinations of a compound of Formula I and a compound of Formula II are particularly valuable in the treatment of corn diseases such as '' is a powdery mildew, rot of the heel and other diseases of leaves and ears, affecting the cereals in the ripening stage. ·

The composition of the invention will preferably be applied to the leaves after harvesting until harvest, with the amount and frequency of application being determined by the severity or expected severity of the fungal disease; A feature of the invention and a particular advantage resulting from the use of the above combinations is the reduced frequency of treatment.

The components of the composition according to the invention can be applied to the plant to be treated either simultaneously or simultaneously, with the last method giving the pre-rotation. The compound of formula I is preferably applied at from 10 to 500 g per hectare, while the compound of formula II is preferably applied at amounts of from 100 to 3000 g per hectare. Thus, the ratio of the compounds of formula I to the compounds of formula II in the combinations according to the invention may range from 5: 1 to 1: 300, expressed as β 2 ^ β ё. The preferred ratio of compound of formula I to compound of formula II is between 2: 1 and 1:25, with 2 to 200 g of the compound of formula I used per hectare.

In order to facilitate production, storage and transport, combinations of compounds of formula I and compounds of formula II are usually prepared in the form of a concentrate to be diluted with water to the desired concentration. Such concentrated formulations may contain 0.5 to 90 Z, preferably 5 to 90 Z hmoo. of active ingredients, supplemented with one or more inert inert agents. Such compositions will generally be in the form of a wettable powder, dust or aqueous suspension. The aqueous dispersions can be prepared in conventional spray tanks suitable for this purpose.

Wettable powders or dusts comprise an intimate mixture of the active ingredients, one or more inert carriers and a suitable surfactant. The inert carrier may be selected from attapulgite clays, clays, clays, clays, talc, and purified silicates. Active surfactants can be found among sulfonated lignins, oaphthalosulphonates and condensed oaphthalosulfonates, alkyl succinates, allyl-monosubstituted phonates, alkyl fluorates, and on-line surfactants, for example, phenol nitrile oxide adducts. For the sake of clarity, the following additional powders are within the scope of the invention and are as follows:

Wettable powders

A compound of formula I is obtained

0.25 to 10

the compound of formula II 10.00 to 80 sοááčedo / a / 0.00 to 10 dispersing agent 0.00 to 10 lrotislntaaé reagent 0.00 to 10 oetečoý / oo8ic / п / to 100

Aqueous suspensions and solutions may contain the active ingredients suspended or dissolved in water or in suitable solvents together with any of the required surfactants, thickeners, sweepers or preservatives. Suitable surfactants may be selected from those mentioned above in the case of readable powders. Polytals are generally selected from a variety of cellulosic and natural gums, while glycols are generally used as antifreeze additives. The preservatives may be selected from a wide variety of surfactants, for example, from paraben, phenol, salifylate, phenylate nitrate, and formaldehyde. Typical examples of aqueous suspensions within the scope of the invention are:

Aqueous suspensions (liquid)

Z ^ η ^ ηο ^ η! ^

the compound of formula I 0.1 to 8.0 the compound of formula II 20.0 to 52.0 sοáččedo / a / 0.0 to 15.0 zahuStovadlo 0.0 to 3.0 anti-freeze 0.0 to 20.0 preservative 0.0 to 1.0 anti-foaming agent . 0.0 to 0.5 water to 100

While the foregoing general examples sufficiently illustrate to those skilled in the art the types of concentrated formulations used in this invention, the following non-limiting examples serve to further illustrate the compositions of the invention.

CTDB in these examples denotes a compound of formula I, while a compound of formula II is designated MBC '.

Examples

It was prepared by the following wettable powder:

Ϊ weight

CTDB

MBC 60.0 condensed sodium oaftalensuftonswitch acids 5.0 triiliyl8Irlo sodium 2,0 silicon dioxide 5.0 kaolin do 100.0

The active ingredients in the example were carefully mixed with the specified excipients in a conventional mixer. The mixture was then further milled in a fluid mill to a particle size of the order of 1 to 10 µm and finally mixed again and vented before packing.

We have prepared a refrigerator aqueous suspension:

wt

CTDB

MBC sodium lauryl bentonite ethylene glycol formaldehyde water to

2,5 50,0

3.0

3.0

5.0

0,2 100,0

The two active ingredients, with particle size optionally reduced by conventional means, were dispersed in water containing the surfactant, preservative and part of the thickener. The particle size of both active ingredients was further reduced by liquid grinding, the residue was added, the mixture allowed to hydrate and the product diluted with water to the desired volume.

Claims (1)

A fungicidal composition comprising, as one fungicidally active ingredient, a triazone compound of formula I Cl (1), and as the second fungicidally active ingredient, the benzoilzole of formula II 1 98291 Wherein the active ingredients I and II comprise 0.5 to 90% by weight of the fungicidal composition and are present in a weight ratio of 2: 1 to 4% by weight of the antifungal agent; 1? 25.