JP6292980B2 - Algae preventive or therapeutic control method and control agent used therefor. - Google Patents

Description

  The present invention relates to a method for controlling the generation of algae in a prophylactic manner and therapeutically controlling algae after the generation, and a control agent used therefor.

  Places where algae occur are not limited to these, but include the outer wall of a building, wood, the side of a ship, the inner wall of an aquarium, swamps and lakes, golf courses, especially putting greens. The generation of algae is a problem because it harms the place of occurrence, detracts from aesthetics, and may generate odors.

  Conventionally, control agents including organochlorine fungicides such as chlorothalonil, dithiocarbamate agents such as mancozeb, maneb and propineb, and DMI agents such as microbutanyl are applied to the lawn before or at the early stage of algae generation There is known a method for controlling the algae to prevent.

  However, there are few effective methods and control agents for therapeutically controlling algae after development, and their development is eagerly desired.

JP 2007-254296 A

Crop Protection 1998, Vol. 17, No. 8, p. 631

  The object of the present invention is not only to prevent the generation of algae by applying to the place where the algae occurs before the generation of the algae, but also to prevent the generation of algae, and to control the treatment by applying after the generation of the algae. And providing a control agent used therefor.

  As a result of diligent research to solve the above-mentioned problems, the present inventor has applied only a combination of an organochlorine fungicide and a dithiocarbamate agent as active ingredients, so that only preventive control before the occurrence of algae can be achieved. And found that the algae after generation can be effectively and therapeutically controlled.

  Therefore, the present invention is as follows.

(1) A method for controlling algae prophylactically or therapeutically by applying an organochlorine fungicide and a dithiocarbamate agent as active ingredients to a place where algae are generated or where they are generated.

(2) The method according to (1) above, wherein the algae are cyanobacteria, green algae, yellow green algae, and diatoms.

(3) In the above (1), the place where the algae is generated or the place where the algae is generated is the outer wall of the building, the timber, the side of the ship, the inner wall of the tank, the swamp, the lake, the lawn, especially the putting green of the golf course The method described.

(4) To contain a combination of an organochlorine fungicide and a dithiocarbamate as an active ingredient, and to prevent or treat algae by applying it to the place where the algae are generated or where it is generated Algae control agent.

  Examples of algae that can be controlled by the method of the present invention include, but are not limited to, the following. As the algae of the turf, cyanobacteria such as Nostock (Nosyc spp., Nosoc spp.) And Formidium (Phormidium spp.), Klebsormium spp. , Green algae such as Cylindroxystis spp., Chlorella spp., Cuttlefish (Scenedesmus spp.), Pediastrum spp., Yellow algae, Vaucheria spp. Diatoms such as Pinnularia spp.). In addition, blue-green algae (Microcystis aeruginosa) occurring in eutrophied lakes, cyanobacteria (Hassallia byssidea) adhering to block moths, and Diplosphaera kodachi (Diplospherea chodachi), etc. It is done.

  Examples of organochlorine fungicides used in the method of the present invention include captan, chlorothalonil, and fusalide, all of which are known compounds and are used as agricultural or lawn fungicides. Chlorotalonyl or captan is preferred.

  That is, a preferred embodiment of the present invention includes an algal control method and an algal control agent, wherein the organochlorine fungicide is one or two fungicides selected from captan, chlorothalonil, or fusalide.

  Dithiocarbamate agents used in the method of the present invention, such as propineb, mancozeb, maneb, thiuram, ziram, etc. are known compounds and are used as agricultural or turf fungicides.

  That is, a preferred embodiment of the present invention includes an algal control method and an algal control agent, wherein the dithiocarbamate agent is one or two fungicides selected from propineb, mancozeb, maneb, thiuram or ziram.

Preferred combinations of the algal control method and the algal control agent of the present invention include propineb + chlorotalonyl, mancozeb + chlorothalonil, diram + chlorotalonyl, thiuram + chlorotalonyl, propineb + captan, mancozeb + captan, dilam + captan, thiuram + captan and the like. .

That is, in a preferred embodiment of the present invention, the combination of organochlorine fungicide and dithiocarbamate is propineb + chlorotalonyl, mancozeb + chlorotalonyl, diram + chlorotalonyl, thiuram + chlorotalonyl, propineb + captan, mancozeb + captan, dilam + captan or thiuram. + Captanic algae control method and algae control agent.
The method of the present invention is a method for controlling algae prophylactically or therapeutically by combining an organochlorine fungicide and a dithiocarbamate agent and applying them to a place where algae are generated or where they are generated. If the location is farmland, turf, lake or aquarium, the active ingredient can be applied as a formulation detailed below, but if the location is on the outer wall of a building, wood, ship side, etc. In addition to the following preparation, it can be mixed with a paint and applied. When the surface of the structure is made of a plastic material such as plastic or rubber, the combination of the compounds of the present invention can be kneaded into the plastic material and applied.

  The organochlorine fungicide and dithiocarbamate used in the method of the present invention are prepared by using an agrochemically acceptable carrier, for example, a solution, an emulsion, a wettable powder, an aqueous suspension, an oily suspension. Ordinary formulations such as soluble powders, soluble granules, suspoemulsion formulations and microencapsulated in polymeric materials.

  These formulations are prepared in a known manner, for example using surfactants (ie emulsifiers and / or dispersants and / or foam formers), optionally using the active ingredients as extenders (ie liquid solvents and / or Or a solid support). Such formulations are prepared with appropriate equipment or prepared before or during application.

  Suitable bulking agents are, for example, water and polar and non-polar organic chemical liquids such as those selected from the following types: aromatic and non-aromatic hydrocarbons (eg paraffins) Alkylbenzenes, alkylnaphthalenes, chlorobenzenes), alcohols and polyols (where appropriate, they may be substituted, etherified and / or esterified). ), Ketones (eg, acetone, cyclohexanone), esters (including fats and oils) and (poly) ethers, unsubstituted and substituted amines, amides , Lactams (eg N-alkylpyrrolidones) and lactones, sulfones and sulfoxides (eg dimethylsulfoxy) ).

  When the extender used is water, for example, an organic solvent can be used as an auxiliary solvent. In essence, suitable liquid solvents are aromatic compounds such as xylene, toluene or alkylnaphthalenes, chlorinated aromatic compounds and chlorinated aliphatic hydrocarbons such as chlorobenzenes, chloroethylenes or methylene chloride, aliphatic Hydrocarbons such as cyclohexane or paraffins such as petroleum fractions, mineral and vegetable oils, alcohols such as butanol or glycols and their ethers and esters, ketones such as acetone, methyl ethyl ketone, methyl isobutyl ketone or cyclohexanone, Strong polar solvents such as dimethyl sulfoxide.

  According to the present invention, the carrier is a natural or synthetic organic or inorganic substance that can be solid or liquid, mixed or combined with the active ingredient to improve applicability. Such solid or liquid carriers are generally inert and should be suitable for use where algae occur or where they occur.

  Suitable solid carriers are, for example, ammonium salts and ground natural minerals such as kaolin, clay, talc, chalk, quartz, attapulgite, montmorillonite or diatomaceous earth, and ground synthetic materials such as high Suitable emulsifiers and / or foam formers are, for example, nonionic and anionic emulsifiers such as polyoxyethylene fatty acid esters, polyoxyethylene fatty alcohol ethers such as, for example, Alkylaryl polyglycol ethers, alkyl sulfonates, alkyl sulfates, aryl sulfonates, and also protein hydrolysates, etc .; suitable dispersants are non-ionic and / or ionic substances, For example, alcohol-POE and / or Or -POP ethers, acids and / or POP-POE esters, alkylaryl and / or POP-POE ethers, fats and / or POP-POE adducts, POE- and / or POP-polyol derivatives, POE- and Selected from: POP-sorbitan or -sugar adducts, alkyl sulfates or aryl sulfates, alkyl sulfonates or aryl sulfonates and alkyl phosphates or aryl phosphates or their corresponding PO-ether adducts It has been. In addition, suitable oligomers or polymers, such as those derived from vinyl monomers, those derived from acrylic acid, EO and / or PO alone or in combination with, for example, (poly) alcohols or (poly) amines Derived from. Furthermore, lignin and its sulfonic acid derivatives, unmodified cellulose and modified cellulose, aromatic and / or aliphatic sulfonic acids and their adducts with formaldehyde can also be used.

  In the above formulations, tackifiers such as carboxymethylcellulose and natural and synthetic polymers in the form of powders or granules or latex such as gum arabic, polyvinyl alcohol and polyvinyl acetate, and natural phospholipids such as Sephaline and lecithin, synthetic phospholipids, and the like can be used.

  Colorants such as inorganic pigments such as iron oxide, titanium oxide and Prussian blue, and organic dyes such as alizarin dyes, azo dyes and metal phthalocyanine dyes, and micronutrients such as iron salts, manganese salts, boron Salts, copper salts, cobalt salts, molybdenum salts, zinc salts, and the like can be used.

  Other possible additives are fragrances, optionally modified mineral or vegetable oils, waxes, and nutrients (including micronutrients) such as iron salts, manganese salts, boron salts, copper salts Cobalt salts, molybdenum salts, zinc salts and the like.

  Stabilizers (eg, low temperature stabilizers), preservatives, antioxidants, light stabilizers, or other agents that improve chemical and / or physical stability can also be present.

  In the method of the present invention, commercially available products containing organochlorine fungicides or dithiocarbamate fungicides can be used.

A commercially available product containing chlorothalonil as an active ingredient is Daconyl Turf (registered trademark) Flowable (SDS Biotech, 53% active ingredient). In the process of the invention, the product can be applied at 0.3 g to 3.0 g / m ² . Preferably it can be applied at 0.5 to 2.5 g / m ² . More preferably, it can be applied at 0.8 to 1.5 g / m ² .
In the method of the present invention, PROTECMATE (registered trademark) WDG (Bayer Crop Science, 70% active ingredient) is a commercially available product containing propineb as an active ingredient. In the present invention, the product can be applied at 0.3 g to 3.0 g / m ² . Preferably it can be applied at 0.5 to 2.5 g / m ² . More preferably, it can be applied at 0.8 to 1.5 g / m ² .

  In the method of the present invention, the combination of each active ingredient is diluted with water to a predetermined concentration, and each active ingredient is separately separated, for example, within 3 days, within 24 hours, or within 3 hours. Sprinkling, mixing each active ingredient formulated into water and diluting with water etc. to the prescribed concentration and spraying, or diluting each active ingredient mixture with water etc. to the prescribed concentration Means spraying. It is desirable to mix and formulate each active ingredient and dilute and spray with water to a predetermined concentration, or dilute and spray with a mixture of each active ingredient to a predetermined concentration and spray .

  The application time of the present invention varies depending on the generation time, generation status, temperature, humidity, and the like of algae. Although it is desirable to apply the method of the present invention before or at the beginning of the development of algae, it exhibits an excellent control effect even after the occurrence regardless of the occurrence of the algae.

  The excellent control effect with respect to algae by the active ingredient combination by the method of this invention is clear from the following Example. Although the individual active ingredients are inadequate with respect to the therapeutic control effect on algae, the combination exhibits an activity that is more than just the sum of the activities.

  When the control effect (control ratio) on the algae by the active ingredient combination exceeds the sum of the effects (control ratio) of the active ingredients when applied individually, there is always a synergistic effect of the active ingredients.

The expected effect (control ratio) for a given combination of two active ingredients can be calculated as follows (Colby, SR, “Calculating Synthetic Responses and Herbicide Combinations”) , Weeds 1967, 15, 20-22):
X is the efficacy (control rate) when a product containing active ingredient A is applied at an application rate of m (ml) (or g / m ² );
Y is the efficacy (control rate) when a product containing active ingredient B is applied at an application rate of n (ml) (or g / m ² );
E ₁ is the efficacy (control ratio) when active ingredient A and active ingredient B are applied at application rates of m and nml (or g / m ² ), respectively;
If

It is.

  Efficacy (control rate) 0 means an efficacy (control rate) corresponding to the control (control rate), and an efficacy (control rate) 100 means that the algae was completely controlled.

  If the actual control rate exceeds the calculated value, the activity of the combination exceeds the additive one. That is, a synergistic effect exists. In this case, the actually observed efficacy must be greater than the value calculated from the above formula for the expected efficacy (E).

  A further method to demonstrate synergistic effects is that of Tammes (see “Isoboles, a graphical representation of synthesis in pestices” in Neth. J. Plant Path., 1964, 70, 73-80).

  The present invention is illustrated by the following examples, but the present invention is not limited to these examples.

In the following examples, each control rate was calculated according to the following formula.

Example 1 : Algicidal effect on cyanobacteria (Phormidium spp) generated in bent green Test method:
The test was conducted on a putting green made of bent glass at a golf course. The test area was set in 3 iterations, with 1 m ² per area. Using a small sprayer, each drug was sprayed after the generation of cyanobacteria with a spray water amount of 1000 L / ha. The average incidence rate of cyanobacteria before treatment was 10.3%.

  Before the treatment, 17 days and 35 days after the treatment, the area ratio (%) of cyanobacteria was examined by visual inspection, and the control rate was calculated by the above formula.

The following table shows that the measured value of the control rate for one of the active ingredient combinations according to the method of the present invention (chlorothalonil + propineb) is higher than the calculated control rate, that is, there is a synergistic effect. Is clearly shown.

(Note 1) The actual measurement value means the observed control rate.

(Note 2) The Colby calculation value means the control rate calculated using the Colby equation.

(Note 3) Daconyl Turf (registered trademark) flowable (SDS Biotech, active ingredient 53%) and Protecmate (registered trademark) WDG (Bayer Crop Science, active ingredient 70%) were used.

  The algal control effect by the combination of mancozeb + chlorothalonil, dilam + chlorothalonil, thiuram + chlorothalonil, propineb + captan, mancozeb + captan, dilam + captan or thiuram + captan can also be confirmed according to the method described in Example 1. it can.

Claims (4)

A method of controlling algae prophylactically or therapeutically by combining chlorothalonil and propineb as active ingredients in a weight ratio of 53:70 and applying the algae to a place where the algae are generated or generated.   The method according to claim 1, wherein the algae are cyanobacteria, green algae, yellow green algae, and diatoms.   The method according to claim 1 or 2, wherein the place where the algae is generated or the place where the algae is generated is an outer wall of a building, wood, a side surface of a ship, an inner wall of an aquarium, a marsh, a lake, a lawn, or a golf course putting green. . Algae control for controlling algae prophylactically or therapeutically by containing a combination of chlorothalonil and propineb as an active ingredient at a weight ratio of 53:70 and applying to the place where the algae occurs or where it occurs Agent.