WO2005077187A1

WO2005077187A1 - Synergic fungicide mixtures

Info

Publication number: WO2005077187A1
Application number: PCT/IT2004/000067
Authority: WO
Inventors: Ottorino Palla; Oreste Odelli
Original assignee: Tecnotrea S.R.L.; Sicit Chemitech S.P.A.
Priority date: 2004-02-18
Filing date: 2004-02-18
Publication date: 2005-08-25

Abstract

Synergic effect fungicide mixtures containing: a) a proteic hydrolyzate in formulation with copper salts at concentration, in terms of metallic copper, ranging from 3 to 15% by weight on the mixture; b) at least one fungicide selected among cytropic systemic fungicides and covering fungicides at a concentration of from 3 to 40% by weight on the mixture; c) one or more surface active agents, inert agents or wetting agents at a percentage content to reach 100% on the ground of the employed percentages of a) and b).

Description

Patent Application for an Industrial Invention having the title: "SYNERGIC FUNGICIDE MIXTURES"

The present invention refers to the fungicide mixtures comprising a proteic hydrolyzate formulated with copper salts and a fungicide at such concentrations that each own yield is encreased against the deseases caused by fungine agents as downy mildews and Phytoftores. More particularly, the object of the present invention consists in formulations to be used in the defence and in the treatment of the plant infections caused by agents as Peronospore and Phytoftores constituted by fungicide mixtures characterized in that the effectiveness of each component is very higher than the activity the same performs, as such or knownly and commonly mixed, such fungicide mixture comprising: a) A proteic hydrolyzate in formulation with copper salts (hereinafter, also I.Pr.Cu.) at concentrations, in metallic copper, ranging from 3 to 40% by weight of active principle on the total mixture weight; b) At least one fungicide selected among cytropic fungicides, systemic fungicides and covering fungicides at active principle concentrations of from 3 to 40% by weight on the mixture; c) An amount to reach 100% of one or more among surface active agents, inert agents and wetting agents. It is known to the skilled people, as a practical knowledge deriving from the application procedures, that it is possible to treat the plant diseases caused by pathogen agents such as Peronospore and Phytoftoresby means of mixture containing cymoxanyl and copper salts, in which the cymoxanyl by weight on the total weight of the used formulation, are above 3%, and the copper salt is present at concentrations, in terms of metallic copper, not lower than 20%: the doses to be applied to the cultivation bring cymoxamyl between 100 and 120g/ha in relation with any single treatment depending, on the peronospore pressure degree. An application is also known, against the vine downy mildew, of proteic hydrozylates containing copper sulphate at a concentration, corresponding to metallic copper, not lower than 5%, whose application amounts bring the cultivation metallic copper quantity ranging from 250 to 280g/ha for each treatment. The replacement, in the abovementioned mixture of cymoxanyl and copper salts, of the copper salt with a proteic hydrolyzate would suggest no decrease of the single active principle amount when applied together in a mixed formulation, because of the fungicide activity decay thereof.

The Applicant has now surprisingly found, what means the reasons and the object of the present invention, that it is possible to make a fungicide formulation, to be used in the defence against the plant pathogen agents, such to lower each single active principle dose to hectare by at least 30% with respect to the practically know and used, however characterized in that it has an effectiveness much higher than the one obtainable by the mere calculated combination of the specific single activity: quite surprisingly, the moderately low concentrations of the many active principle constituents seen the emphasize one another to gather, during the methodical use against pathogen agent, a high control of the infection percentage as well as a contemporaneous low infection diffusion, without any collateral phenomenon. Therefore the object of the present invention is constituted by fungicide compositions with a synergy, activity against plant pathogen agents containing: a) a proteic hydrolyzate in formulation with copper salts at concentration, in terms of metallic copper, ranging from 3 to 15% by weight on the mixture; b) at least one fungicide selected among cytropic fungicides, systemic fungicides and covering fungicides at active principle concentrations of from 3 to 40% by weight on the mixture; c) one or more surface active agents, inert agents or wetting agents at a percentage content to reach 100% on the ground of the employed percentages of a) and b).

Examples of suitable fungicides are metalaxil, dimetomorph, cymoxanyl, azoxystrobin, methyl kresoxyn , iprovalicarb, phosetyl aluminum, famoxadone: the people skilled in the art may be choose any other kind of fungicide and the use of such other fungicide will be within the scope of the present invention.

As to the concentrations of the two main components, i.e. a) and b), the above said ranges outline logical thresholds out of which the aforementioned synergic effect seems to decrease: however, the meaning and the definition of the present invention cover also employed formulations containing the above components, ever if at concentrations out of the reported ranges, when and if the contemporaneous presence of the defined compounds show activities higher than the ones due to the mere principle combination, according to the known art teaching . In return, preferred concentrations in the abovedefined ranges are: 5% ÷ 12% as a copper, as metallic copper, formulated in the proteic hydrolyzate; 3%> ÷ 20%) as to the active principles of the cytropic and systemic fungicides; 10%) ÷ 40%) as to the active principles of the covering fungicides. The pathogen agents to be fighted by the use of the inventive composition are peronosporae, phytoftorae, septoriae and alternariae.

Plants to be treated by the application of the inventive mixtures are, for instance, grape, tomato, potato, cucurbitaceae, tobacco, and so on. Example 1 Test on grape Peronospora of the Dolcetto variety. The data are average from 4 replications. TABLE 1 Remark on leaves -% infection

TABLE 2

Remark on leaves -% diffusion

TABLE 3 Remark on bunches -% infection

TABLE 4 Remark on bunches -% diffusion

Example 2 Test on grape Peronospora of the Moscato variety. The data are average from 4 replications. TABLE 5 Remark on leaves -%> infection

TABLE 6 Remark on leaves -%> diffusion

TABLE 7 Remark on bunches -% infection

TABLE 8 Remark on leaves -% diffusion

Application methodology and biological activity data remark The tests have been carried out on random blocks, through 4 replications. The formulate as either suspended or dissolved into the necessary water amount, and then it was pressure sprayed every 7÷8 other day. The remarks on the leaves were carried out by randomly collecting 100, leaves on each replication and by the measure of the infection and of the disease diffusion thereon. The remarks on the bunches have been carried out by randomly collecting 100 bunches and by the measure of the fruit attacked by Peronospora and the relevant disease diffusion thereon.

Results

The example 1 table illustrates that, under a normal/low condition of peronosporic infection, the decrease of the active principle concentrations in the formulate containing the proteic hydrolyzate under the employment dosage does not decrease and, on the contrary, it does improve the control of the Peronospora diffusion onto the leaves (Table 2).

In the example 2, under a higher peronospora pressure as from the untreated data and notwithstanding a lower amount of active principle applied in the proteic hydrolyze containing formulate, a remarkable control is obtained about the diffusion and the infection on both the leaves and the bunches.

In all cases, it is possible to emphasize the relevance of the decrease of the active principle application dosage, which determines a low environmental impact of the formulations

(mixtures) according to the invention with respect to the known products.

Claims

1. Synergic effect fungicide mixtures containing: a) a proteic hydrolyzate in formulation with copper salts at concentration, in terms of metallic copper, ranging from 3 to 15% by weight on the mixture; b) at least one fungicide selected among cytropic systemic fungicides and covering fungicides at a concentration of from 3 to 40% by weight on the mixture; c) one or more surface active agents, inert agents or wetting agents at a percentage content to reach 100% on the ground of the employed percentages of a) and b).

2. Synergic effect fungicide mixtures according to the preceding claim in which the fungicide component b) is chosen, interalia, among metalaxil, dimetomorph, cymoxanyl, azoxystrobin, methyl kresoxyn , iprovalicarb, phosetyl aluminum, famoxadone.

3. Synergic effect fungicide mixtures according to claim n. l in which the proteic hydrolyzate is at a concentration, in terms of metallic copper, preferably, ever if not limited to, between 5 and 12% by weight.

4. Synergic effect fungicide mixtures according to claim n. l in which the fungicide, chosen between cytotropic and the systemic fungicides is at a concentration preferably ranging from 3 to 20% by weight.

5. Synergic effect fungicide mixtures according to claim n.l in which the fungicide, selected among the covering fungicides is at a concentration preferably ranging between 10 and 40% by weight. Use of the synergic effect fungicide mixtures according to one or more preceding claims in the control of the plant diseases caused by peronosporae, phytoftorae, septoriae and alternariae.