JP2008169175A - Controlling agent for moss and alga for turfgrass, and method for controlling such moss and alga - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To accomplish healthy growth of turfgrass through providing a chemical agent for controlling mosses and algae without developing significant decay or browning symptom of turfgrass and providing a method for controlling such mosses and algae. <P>SOLUTION: The controlling agent for mosses and algae for turfgrass is characterized by comprising an aqueous solution containing potassium carbonate as the main ingredient. The method for controlling such mosses and algae is characterized by comprising spraying the above controlling agent over a turf field. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention mainly relates to a control agent and a control method for moss and algae that are generated on lawn soil such as golf courses, road slopes, parks, outdoor sports stadiums, and gardens.

  In recent years, turf grass growing on golf courses, road slopes, parks, outdoor sports stadiums, gardens, etc. has become serious problems of poor growth and poor aesthetics due to contamination with moss and algae. Especially in the green of golf courses, not only poor vegetation and deterioration of aesthetics due to the occurrence of moss and algae, which are said to be largely due to management conditions such as excessive irrigation, poor drainage, excessive fertilization, low cutting, etc. It is also a cause of decline.

The moss plant is a general term for mosses, mosses, etc., and Gingoke, which is a major problem in golf courses, is a genus of mosquitoes belonging to the genus Harigane. This Gingoke is a small moss having a length of about 5 to 10 mm. In addition to extending the spore from the gametophyte and spreading the spore, it grows from the gametophyte by asexual shoots. These asexual shoots are very light and water-repellent, so they are propagated by rainfall and watering.
Green algae damage is caused by green algae such as Aomidoro and is often seen in the green of golf courses. Algae are similar to those of cyanobacteria, but the cell structure is quite different. Occurring in a humid place, and in the case of frequent occurrence, the lawn is covered with alga and oxygen breathing is hindered.

As one of the methods for solving this problem, so-called cultivating control methods such as ventilation and drainage improvement have been performed. Specifically, the density of upright stalks of turf is increased, excessive irrigation is avoided, the lawn surface is always maintained, baked sand is used for the topsoil, and the sunshine conditions are improved.
However, these methods have a problem that it is difficult to completely control the generation of moss and algae, and management requires a lot of labor.

Moreover, the control method by the chemical | medical agent of the moss and algae which generate | occur | produces in lawn soil is also performed. For example, use of fosetyl + polycarbamate mixture “Gorlet” (registered trademark) or the like.
However, phytotoxicity is a problem for turfgrass and is not satisfactory.
Damage caused by algae in turfgrass is known in the United States and the United Kingdom, and although TPN and mancozep are effective, it has been reported that complete control with drugs is difficult as in Japan. (Non-Patent Documents 1 and 2)

Recent information introduces the status of golf courses in putting green as follows. “The moss on the putting green is like a devil's curse that plagues golfers and even the most hard-working and experienced green keepers. Suddenly, you may not even notice until the moss appears to cover the entire surface of the green, and chemical control is too strong for turfgrass, and the effect of the moss on the extinction is It ’s slow. ”(Non-Patent Document 3)
In Non-Patent Document 3, “Junction” (trade name) and “TeraCite” (trade name) are recommended. “Junction” is a fungicide containing 15% mancozep and 46% copper hydroxide. “Terasite” contains 34% sodium carbonate / peroxyhydrate. Although both are effective, phytotoxicity has been reported. Moreover, although it is said that the application of iron sulfate is effective, it is necessary to apply 4-5 times every two weeks, and this is not perfect.

In order to solve the above problems, for example, a technique of applying a Melia plant that suppresses the generation of algae to lawn (Patent Document 1), a technique of applying an effective amount of triticonazole (Patent Document 2), dimethyl A technology using a water-soluble polymer obtained from an amine and epichlorohydrin (Patent Document 3), a technology using a water-soluble sulfate of iron and a water-soluble sulfate of aluminum (Patent Document 4), and using streptomycin or a salt thereof Various techniques (Patent Document 5) have been proposed.
However, none of these proposals is an essential solution.

JP 7-97305 A JP-A-8-208410 JP 10-291905 A JP-A-11-106305 JP-A-2005-289845 Phillip Colbauch, “Algae-crusity fors for golf greens”, Research by Science and Technology Promotion Coordination (1997) Paul Vincelli, 1 other, "Chemical Control of Turfglass Diseases 2004", University of Kenkyuky College of Education, UK Cooperative Ex. 6 USGA GREEN SECTION RECORD (July / August 2004 issue)

  In view of the above circumstances, the present invention provides a turfgrass with a healthy growth by providing a chemical and a control method that can control moss and algae without causing significant dying or browning of turfgrass. Objective.

  In order to solve the above-mentioned problems, the present inventor screened a drug that can effectively control mosses and algae generated in turfgrass. As a result, it has been found that potassium carbonate shows a specific and remarkable control effect on moss and algae generated in lawn soil without causing phytotoxicity to turfgrass, and the present invention has been completed.

  That is, the present invention is a control method for moss and algae characterized by containing potassium carbonate as a main component, and a method for controlling moss and algae characterized by spraying this on turf.

  According to the present invention, moss and algae generated in turf can be controlled without causing phytotoxicity to turf, and the healthy growth of turf can be promoted.

The moss and algae control agent of the present invention is characterized by containing potassium carbonate as a main component in an aqueous solution. In the practice of the present invention, a high-concentration aqueous solution of potassium carbonate is prepared and diluted for practical use. The concentration of the high concentration aqueous solution of potassium carbonate is saturated at 50.33% when a raw material containing 66% as a K2O equivalent concentration is used.
The amount of moss and algae control agent of the present invention, the processing location, processing time, cultivation management condition of the turf, mosses and type of algae, varies depending degree of occurrence, usually, 1 m ² per, 12.5～50G It is preferably sprayed at a concentration of 16.7 to 25 g.

  The present invention, for the purpose other than control of moss and algae, if necessary, nitrogen such as urea, nitrate, ammonium salt, plant hormones such as choline, cytokinin, gibberellin, folic acid, citric acid, acetic acid, succinic acid, Organic acids such as aspartic acid, hydrochloric acid, phosphoric acid, sulfuric acid and the like can be added.

  The moss and algae control agent of the present invention may be sprayed by selecting a place where the disease caused by the moss and algae appears, but the moss and algae control agent of the present invention is not harmful to turfgrass itself. Can be sprayed regularly without checking the turf.

Hereinafter, the configuration of the present invention will be specifically described with reference to test examples.
Test Example 1 Effective Magnification Test of Drugs In summer (August), when growth conditions are severe for bentgrass, a control test was conducted on gingoke, which is very difficult to control at a golf course in Tottori Prefecture. A putting green with high use frequency was used as a field.
As the chemical solution, a 50.3% saturated aqueous solution of potassium carbonate containing 66% as a K2O equivalent concentration was prepared, and a sprayed chemical solution was prepared by diluting the solution to 40 times, 50 times, 60 times, 70 times, and 80 times. .
Partition the field into six 0.5 m × 0.5 m, the sprayed chemical solution was sprayed at a rate of 1 m ² per liter (temperature 30 ° C.). The changes in bentgrass before and 24 hours after spraying were observed with the naked eye and photographs. The results are shown in Table 1.

From Table 1 and the results of macroscopic observation and close-up photographs, the test plots 1 and 2 are most effective against Gingoke 24 hours after spraying, and the green color of bentgrass is maintained. In Test Zones 3 and 4, the effect is recognized, but a slight bluish color remains on the chinoke. In test section 5, no effect was observed.
In Test Zone 1, a slight brown scorch was observed in the bentgrass, but it was only recovered by cutting. In the test groups 2 to 5, no leaf burn was observed.

Test Example 2 Examination of the amount of sprayed water In place of 1 liter / m ² of 40-fold dilution of Test Zone 1 in which the effect on Gingoke was recognized in Example 1, 0.5 liter / m ² was sprayed. In the same manner as in No. 1, changes in bentgrass were observed before and after spraying with the naked eye and photographs.
As a result, no change was observed in Gingoke.

Test Example 3 Observation of Chemical Damage In the same manner as in Test Example 1, a chemical solution was prepared, and sprayed drug solutions of 20-fold dilution, 30-fold dilution, 40-fold dilution, and 50-fold dilution were prepared. Partition the field into six districts of 0.5 m × 0.5 m, the sprayed chemical solution was sprayed at a rate of 1 m ² per liter (temperature 30 ° C.). The changes in bentgrass before and 24 hours after spraying were observed with the naked eye and photographs.
(1) After 24 hours By visual observation, the 20-fold and 30-fold zones are browned, and phytotoxicity can be seen from a distance. Minor browning was observed in the 40-fold section. No phytotoxicity was observed in the 50-fold section.
In the 20-fold section, Gingoke discolored violently and phytotoxicity occurred in bentgrass.
In the 30-fold ward, chinooks changed color violently, and bentgrass turned brown from the tip of the leaves to the center.
In the 40-fold area, Gingoke discolored and the bentgrass leaf tips turned slightly brownish.
In the 50-fold section, Gingoke discolored and no change was observed in bentgrass.

(2) Four days later In the macroscopic observation, the brown color of the 20-fold section was conspicuous, and the recovery from the chemical damage was very delayed. In other wards, phytotoxicity has recovered and is not noticeable from a distance.
In the 20-fold ward, the bentgrass leaves have many parts that turn brown from the stock. Use on site is not preferable from the viewpoint of landscape and bentgrass growth. However, the lawn is not completely dead.
In the 30-fold ward, phytotoxicity has recovered compared to the day after spraying. Even if the part where the bent glass turns brown is compared with the 40-fold section, there is almost no change. This is the maximum magnification when used in the field.
In the 40-fold ward, the bentgrass leaf tips are slightly brownish, but it recovers quickly.

Comparative example It tested about potassium nitrate, potassium chloride, primary potassium phosphate, potassium bicarbonate, and potassium sulfate like Test Examples 1-3.
Neither effect was recognized. It has been found that the potassium carbonate of the present invention exhibits a remarkable control effect on mosses and algae generated in turf soil without specifically causing phytotoxicity to turfgrass.

  The present invention can control moss and algae without causing turfgrass to show significant death or browning, so that turfgrass can be grown healthy on golf courses, road slopes, parks, outdoor sports stadiums, gardens, etc. This can greatly contribute to the improvement of putting quality especially in the green, which is a problem in golf courses.

Claims (2)

  An algae and algae control agent comprising potassium carbonate as a main component in an aqueous solution.   A method for controlling moss and algae, comprising spraying the moss and algae control agent according to claim 1 on turf.