JPH05271024A - Method for controlling disease injuries of lawn by copper sulfide - Google Patents

Abstract

PURPOSE:To control disease injuries of lawn by applying an aqueous solution of copper sulfide and a mineral containing copper sulfide to the lawn. CONSTITUTION:Disease injuries of lawn are controlled by dissolving copper sulfide or a mineral (e.g. chalcocite or azurite) containing the copper sulfide in water, hot-spring water or sea water and then applying the solution to the lawn or mixing copper sulfide or the mineral containing the copper sulfide with a solid material such as joint soil or fertilizer and then applying the mixture to the lawn or further mixing the mixture with hot-spring deposite as to increase sterilizing power and then applying the mixture to the lawn. When mixture with the solid material is sprayed, the mixture is applied after grinding into fine power and the mixture sprayed on the leaf surface of the lawn is poured into spaces among lawns by sufficiently watering. The copper sulfide, etc., is sufficiently mixed so that magnifying power of dilution for application may become 500-2000 times in the case of solution application and 300-2000 times in the case of solid application and uniformly applied.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a novel lawn disease control method which can be generally used for controlling lawn diseases such as golf courses, lawn plazas, sports turf, parks and gardens.

[0002]

2. Description of the Related Art Lawns are widely used in golf course greens, fairways, tees, roughs or sports turfs, parks, gardens, etc. Due to the purpose of use and aesthetics, short cutting and frequent pedaling are often used. It adds stress and is prone to illness.

For this reason, various measures have been taken to make the disease resistant turfgrass varieties selective and to adjust the environmental conditions to make them less susceptible to diseases.

Nevertheless, when a lawn of high quality is required, disease control must be carried out. As a direct means, synthetic organic pesticides were applied.

[0005]

[Problems to be Solved by the Invention] Although many criticisms regarding the use of agricultural chemicals on golf courses are unscientific and unilateral, it is desirable not to use toxic agricultural chemicals. Materials that act effectively only on lawn pathogens with low environmental pollution are desired.

Also, it must be applied to diseased lawns to effectively prevent or cure the disease.

[0007]

A method for controlling lawn diseases according to the present invention comprises a copper sulfide or a mineral containing copper sulfide, for example,
It is a method characterized by dissolving chalcopyrite or cyanite ore in water, hot spring water, or seawater and applying it to lawn. Moreover, a crushed product of these copper sulfide materials is mixed with joint soil or fertilizer, or It is a method characterized in that it is mixed with hot water to increase the sterilizing power and applied to the lawn.

Since copper sulfide is hardly soluble in water, it is dissolved in aqueous ammonia, ammonium chloride or dilute nitric acid to form an aqueous solution. Also, in the absence of acid, it becomes colloidal and disperses well in an aqueous solution, so this is sprayed.

When mixed and sprayed with a material to be applied as a solid matter to the soil, fertilizer or other lawn, it is pulverized into a fine powder of 2.0 mm or less and mixed and applied. At this time, if you ride on the lawn leaf surface, it may cause obstacles, so it is important to sprinkle enough water and pour it well into the gap in the lawn.

The application ratio is 500 to 2000 in an aqueous solution.
In the case of double application, or solid application, it must be mixed well so as to be 300 to 2000 times and applied uniformly.

The copper sulfide thus applied has a low water-solubilization property, so that it gradually elutes due to soil moisture or irrigation and suppresses the development of pathogens into turfgrass. It stops the extension and prevents the grass from entering.

[0012]

EXAMPLES The present invention will be described below with reference to examples, but the present invention is not limited thereto.

[0013]

Example 1 2 kg of copper sulfide having a purity of 60% was dissolved in 1000 liters of ammonia water, and a 500 times solution was sprayed on a lawn of 10 are by a sprayer.

[0014]

[Example 2] Copper sulfide having a purity of 60% is pulverized into a fine powder of 2.0 mm or less, mixed with a material to be applied as solid matter to joint soil, fertilizer or lawn and sprayed. At this time, if you keep riding on the lawn leaf, there may be obstacles, so sprinkle enough water and pour it well into the gap in the lawn.

[0015]

[Experimental method and results]

[0016]

[Experiment 1] Copper sulfide with a purity of 60% was added 250 times and 500 times.
The mixture was mixed with potato agar so as to double the volume, sterilized under high pressure, and dispensed into a petri dish. After the agar has cooled and solidified,
Pythium is an important lawn disease. Rhizoctonia and Sclerotinia were inoculated, the growth of these bacteria was measured, and the inhibitory power of pathogenic bacteria by each magnification of copper sulfide was investigated.

As a result, both concentrations were completely 100% against Pythium bacterium that causes Pythium bright to turfgrass.
Stopped the growth of. Both concentrations completely blocked 100% of Rhizoctonia, which causes brown and yellow patches on turfgrass.

On the other hand, 250 times the complete inhibition of 100% of the Sclerotinia which causes dollar spots on turfgrass, and 37 times the inhibition rate of 500 times.

[0019]

[Experiment 2] The same copper sulfide as in [Experiment 1] was mixed with hot spring flower at a weight ratio of 1: 1 and diluted to 500 times and 1000 times, and then bentgrass in a warming house inoculated with Rhizoctonia was inoculated. 0.5 liter per square meter was applied. As a result, 90% or more lesion enlargement was observed in the untreated group, but in the copper sulfide + hot water treatment group, the lesion was limited to dead lesions only in the inoculated area, and no new lesion was observed.

[0020]

Industrial Applicability Copper sulfide and minerals containing copper sulfide are
Pythium, an important lawn disease of turfgrass. Sterile or inhibitory action against Rhizoctonia and sclerotinia is recognized, and lawn diseases can be controlled by applying it to lawn mixed with an aqueous solution or solid material of copper sulfide and a mineral containing copper sulfide. Is possible.

Claims (4)

[Claims] 1. A method for controlling a lawn disease, which comprises applying an aqueous solution of copper sulfide and a mineral containing copper sulfide to the lawn. 2. A method for controlling lawn diseases, which comprises mixing copper sulfide and a mineral containing copper sulfide with a solid material such as joint soil or fertilizer and applying the mixture to lawn. 3. A method for controlling a lawn disease, which comprises mixing copper sulfide and a mineral containing copper sulfide with hot spring water and applying the mixture to lawn. 4. A method for controlling a lawn disease, which comprises dissolving copper sulfide and a mineral containing copper sulfide in hot spring water or seawater and applying the solution to the lawn.