JP5505830B2 - Method for controlling powdery mildew control using light rays - Google Patents

Description

The present invention relates to a method for controlling powdery mildew by increasing the protein in the growing strawberry plant and the edible plant by giving the growing plant a protein that gives blue and green light during nighttime respiratory action and controls the body nutrient concentration of the growing plant. About.

Conventionally, as a countermeasure against powdery mildew of plants, it has been pesticide control while performing nitrogen control treatment by fertilizer management during the growing period, but it is a control technique that relies only on pesticide control.

  Patent Publication No. 2009-26111

The challenge to solve the problem

Traditionally, the method of controlling powdery mildew during plant growth is that most producers have relied on pesticide control, and if bad weather continues, powdery mildew has occurred repeatedly from one to the next. In order to control pesticides, it has been difficult to prevent the growth of plants during growth.

Some producers use a method of sterilizing powdery mildew fungus using ultraviolet rays close to sunlight, but strong UV irradiation to sterilize powdery mildew disease is directly applied to the human body. It is difficult to know that it is well known that it has been medically elucidated to cause harm to the body, especially the skin, when irradiated.

Means for solving the problem

Irradiate green and blue single rays or blue and green combined rays at night without being affected by bad weather, increasing the protein concentration, which is the nutrient concentration in the growing strawberry plants and edible plants, It is characterized by controlling powdery mildew.

Effect of the invention

The protein that controls the nutrient concentration in the body of the growing plant can be increased and controlled without being forced into the harvest period, assimilation and respiration of the plant being raised.

According to the present invention, by using green, blue single light, blue and green composite light ray treatment, it is possible to increase the protein without increasing the protein in a natural and natural manner. The disease can be suppressed and reduced, which is a great benefit for producers.

FIG. 3 is a schematic diagram in which the blue fluorescent lamp 1 is installed on the upper surface of the green fluorescent lamp 2 and the strawberry plant seedling 13 is irradiated with green and blue rays. FIG. 3 is a schematic diagram in which the blue fluorescent lamp 1 is installed on the upper surface of the green fluorescent lamp 2 and the strawberry plant seedling 13 is irradiated with green and blue rays. FIG. 2 is a schematic diagram in which blue fluorescent lamps 1 and green fluorescent lamps 2 are arranged side by side on one plane, and strawberry plant seedlings 13 are irradiated with green and blue light rays. Fig. 2 is a schematic diagram in which a blue fluorescent lamp 1 is installed on the upper surface of a strawberry plant seedling and irradiated with blue light. FIG. 2 is a schematic diagram in which a green fluorescent lamp 2 is installed on the top surface of a strawberry plant seedling 13 and irradiated with green light. FIG. 3 is a schematic diagram in which a blue LED 3 is installed on the upper surface of the green LED 4 and the strawberry plant seedling 15 is irradiated with green and blue light. FIG. 2 is a schematic diagram in which a green LED 4 is installed on the upper surface of the blue LED 3 and the strawberry plant seedling 15 is irradiated with green and blue light. FIG. 2 is a schematic view in which blue LEDs 3 and green LEDs 4 are arranged side by side on one plane and the strawberry plant seedling 15 is irradiated with green and blue light rays. FIG. 2 is a schematic diagram in which a blue LED 3 is installed on the upper surface of the strawberry plant seedling 15 and irradiated with blue light. FIG. 2 is a schematic diagram in which a green LED 4 is installed on the upper surface of the strawberry plant seedling 15 and irradiated with green light. These are the elevation views of arrangement | positioning of the green fluorescent lamp 7 installed in parallel with the both sides inside a pipe house, and the blue fluorescent lamp 8 installed in the center part. These are the top views of arrangement | positioning of the green fluorescent lamp 7 installed in parallel with the both sides inside a pipe house, and the blue fluorescent lamp 8 installed in the center part.

  In the embodiment of the present invention, protein quantification methods include a derma method for measuring the amount of nitrogen after combustion and a Kjeldahl method for measuring the amount of ammonia after sulfuric acid decomposition as a highly accurate method. The measurement method used as the standard of the present invention is the strong oxidizing agent peroxidation while boiling the strawberry petiole and leaf body with HACH's Digestal 23130-20 in strong acid sulfuric acid at 440 ° C. It is based on the gel tar method, which measures the amount of ammonia with HACH spectrophotometer 3000R, and is measured by a highly accurate protein quantification method. The

The amount of Kjeldahl nitrogen in the growth of strawberry plants, the amount of Kjeldahl in the leaf body, that is, the amount of protein is no irradiation, irradiation of only green light, irradiation of only blue light, light by combination of green light and blue light The effect of increasing the protein in the strawberry plant due to the difference in the combination of irradiation, etc. was compared with the small difference in the occurrence of powdery mildew in the growing strawberry plant.

Attached Table 1 below shows the data obtained by irradiating 50 sample seedlings of strawberry plants with only the green light from the green fluorescent lamp, and shows the measured data in Attached Table 1.

50 samples of strawberry plants are irradiated with only blue light from a blue fluorescent lamp, and the measured data are displayed in Appendix 1.

A blue fluorescent lamp is installed on the upper surface of the green fluorescent lamp, and the green light of the green fluorescent lamp and the blue light of the blue fluorescent lamp are simultaneously irradiated to 50 sample seedlings of the cultivated strawberry plant, and the measured data is displayed in Table 1. .

A green fluorescent lamp is installed on the upper surface of the blue fluorescent lamp, and the blue ray of the blue fluorescent lamp and the green ray of the green fluorescent lamp are simultaneously irradiated to 50 sample seedlings of the cultivated strawberry plant. display.

Without fluorescent light, 50 strawberry plant sample seedlings were prepared without light irradiation, and the measured data is shown in Appendix 1.

Irradiate the growing strawberry plants by irradiating only green light from green fluorescent light, only blue light from blue fluorescent light, green light from green fluorescent light, blue light from blue fluorescent light per 50 strawberry plants Table 1 shows the comparison between the Kjeldahl nitrogen amount and the number of powdery mildew occurrences, depending on the difference. As for Kjeldahl nitrogen amount, an average value of 50 samples is shown in Table 1.

Attached Table 2 displays the measured data by irradiating 50 sample seedlings of strawberry plants with only the green light from the green LED.

Only the blue light from the blue LED is irradiated to 50 sample seedlings of strawberry plants, and the measured data is displayed in Appendix 2.

A blue LED is placed on the upper surface of the green light of the green LED, and the blue and green rays are simultaneously irradiated to 50 sample seedlings of strawberry plants, and the measured data is displayed in Appendix 2.

A green LED is installed on the upper surface of the blue light of the blue LED, and the green light and blue light are simultaneously irradiated to 50 sample seedlings of strawberry plants, and the measured data is displayed in Appendix 2.

Without LED, 50 strawberry plant sample seedlings are prepared without light irradiation, and the measured data is displayed in Appendix 2.

Table 2 compares the difference in the amount of Kjeldahl nitrogen and the occurrence of powdery mildew by irradiating the grown strawberry plants according to the combination of green light from green LED and blue light from blue LED per 50 grown strawberry plants. Is displayed. The Kjeldahl nitrogen amount is shown in Table 2 as an average value of 50 samples.

Attached Table 3 is based on the implementation of the strawberry-producing farmer's nursery pipe house, and green and blue fluorescent lamps are installed 1m above the seedling in the nursery house, and it takes 30 days from sunset to sunrise. Table 3 shows a comparison of the number of powdery mildew occurrences of the strawberry plant seedlings after planting in the main field, although the effect of irradiation is Keldar nitrogen, that is, protein is high but low.

The above-described “[0012]”, “[0013]”, “[0014]”, “[0015]”, “[0016]”, “[0017]”, “[0018]”, “[ [0019] "," [0020] "," [0021] "," [0022] "," [0023] "," [0024] ", items in drawings and examples, Table 1, Table 2, Table 3. This will be described in detail.

FIG. 5 is a schematic diagram in which a green fluorescent lamp 20W and 2 green light rays are irradiated on a growing strawberry plant seedling 13 at a position 1 m high at night from sunset to sunrise in a greenhouse. .
After irradiating the strawberry plant seedlings for 30 days at night, the measured value of 147 ppm of Kjeldahl nitrogen amount is displayed in Table 1.

FIG. 4 is a schematic diagram in which a blue florescent light 20W and 1 blue light are irradiated on a nightly strawberry plant seedling from sunset to sunrise at a position of 1 m height on a growing plant strawberry seedling 13 in a greenhouse. It is.
Table 30 shows the measured value of the Kjeldahl nitrogen amount after irradiation for 30 consecutive days at night.

FIG. 1 shows a green fluorescent lamp 20W and green light from a green fluorescent lamp 20W irradiated at a night from the time of sunset to the sunrise at a position of 1m height on a growing strawberry plant seedling 13 in a greenhouse. It is the schematic diagram which installed the blue fluorescent lamp 20W and 1 from the height of 0.5 m from the upper surface part of the lamp | ramp, and irradiated the blue light of the upper part and the green light of the lower part simultaneously.
After irradiating the strawberry plant seedling 13 at night for 30 consecutive days, the measured value 159 ppm of the Kjeldahl nitrogen amount is displayed in Table 1.

FIG. 2 shows that a blue fluorescent lamp 20W and 1 blue light are irradiated on a growing strawberry plant seedling 13 at a height of 1 m at night from sunset to sunrise in a greenhouse. It is the schematic diagram which installed the green fluorescent lamp 20W and 2 from the height of 0.5 m from the upper surface part, and irradiated the green light of the upper part and the blue light of the lower part simultaneously.
After irradiating the strawberry plant seedling 13 at night for 30 consecutive days, the measured value of the measured Kjeldahl nitrogen amount is displayed in Appendix 1 as 140 ppm.

FIG. 3 is a plan view of green fluorescent lamps 20W, 2 and blue fluorescent lamps 20W, 1 at night from sunset to sunrise at a height of 1 m on a growing strawberry plant seedling 13 in a greenhouse. It is the schematic diagram which lined up and irradiated the green light and the blue light.
After irradiating the strawberry plant seedling 13 at night for 30 consecutive days, the measured value 175 ppm of the Kjeldahl nitrogen amount is displayed in Table 1.

The measured value 81 ppm of the Kjeldahl nitrogen amount after 30 days without irradiating with a fluorescent light in the growing greenhouse of the cultivated strawberry plant seedling 13 is shown in Table 1.

Next, when compared with 81 ppm of Kjeldahl nitrogen measured with no fluorescent lamp light irradiation, the amount of Kjeldahl nitrogen by light irradiation of only green is 147 ppm, then a blue fluorescent lamp is installed on the upper surface of the green fluorescent lamp, The Kjeldahl nitrogen amount 159 ppm irradiated simultaneously with the blue light beam and the lower green light beam, the green fluorescent lamp was installed from the upper surface of the blue fluorescent lamp, and the Keldar nitrogen amount 140 ppm after simultaneously irradiating the upper green light beam and the lower blue light beam The green fluorescent lamp and the blue fluorescent lamp were arranged in one plane and irradiated with green light and blue light at the same time, and the Kjeldahl nitrogen content was displayed at 175 ppm. Simultaneously irradiating the green fluorescent lamp with the blue light simultaneously with the blue fluorescent light on the upper surface of the green fluorescent lamp or in the same plane, the blue light is included in the green light effect, thereby increasing more Kjeldahl nitrogen. A proof that the amount, ie protein, is increased was established.

FIG. 10 is a schematic view in which the strawberry plant seedling 15 that is being grown in the greenhouse is irradiated with green light from the green LED 4 at night from sunset to sunrise at a height of 1 m.
The measured value 108 ppm of Kjeldahl nitrogen measured after irradiating the strawberry plant seedling 15 for 30 days continuously at night is shown in Table 2.

FIG. 9 is a schematic view in which the strawberry plant seedlings 15 that are being grown are irradiated with blue light from the nighttime blue LED 3 from sunset to sunrise at a position 1 m high in the greenhouse.
The measured value 98 ppm of Kjeldahl nitrogen amount measured after 30 night irradiation on the strawberry plant seedling 15 for 30 days continuously is shown in Table 2.

FIG. 6 shows that the green strawberry plant seedling 15 in the greenhouse is irradiated with green light of the green LED 4 at night from sunset to sunrise at a height of 1 m, and is 0.1 m higher than the upper surface of the green LED 4. It is a schematic diagram in which blue light is simultaneously irradiated by the blue LED 3.
The measured value 112 ppm of Kjeldahl nitrogen measured after 30 days of irradiating the strawberry plant seedling 15 for 30 days continuously is shown in Table 2.

FIG. 7 shows that the blue LED 1 is irradiated with blue light at night from sunset to sunrise at a position of 1 m height on the growing strawberry plant seedling 15 in the greenhouse, and the upper surface of the blue LED of the blue light It is the schematic diagram which irradiated green light simultaneously with the green LED 4 from 0,1m height.
The measured value of 109 ppm of Kjeldahl nitrogen measured after 30 night irradiation of the strawberry plant seedling 15 for 30 days is shown in Table 2.

FIG. 8 shows that green LEDs and blue LEDs are arranged in a single plane at a position 1 m high at a strawberry plant seedling 15 being grown in a greenhouse at night from sunset to sunrise. It is the schematic diagram which combined the light ray and the light and irradiated simultaneously.
The measured value of 125 ppm of Kjeldahl nitrogen measured after 30 night irradiation on the strawberry plant seedling 15 for 30 days is shown in Table 2.

In a greenhouse, the strawberry plant seedlings 15 that are being nurtured by LEDs were not irradiated with light rays by blue and green LEDs, and after 30 days, the measured value of Kjeldahl nitrogen was 81 ppm.

  Measurement of Kjeldahl nitrogen amount after 30 days under the condition of no light irradiation of green and blue LEDs from sunset to sunrise. Compared with Kjeldahl nitrogen amount, which displays 81 ppm, green light of green LED4 is a strawberry plant Irradiate the seedlings, 30 days later, Kjeldahl nitrogen amount 108 ppm, and then irradiate the strawberry plant seedlings simultaneously with the blue LED3 blue light from the upper surface of the green LED4, and 30 days later, Kjeldahl nitrogen amount 112 ppm, green LED light and blue LED A light beam was installed on a flat surface, and a strawberry plant seedling was irradiated with green light and blue light simultaneously, and after 30 days, a Kjeldahl nitrogen content of 125 ppm was displayed.

In addition, the LED green light effect is applied to the plant strawberry plant seedlings in the greenhouse, and the strawberry plant seedling being grown is irradiated with LED green light at night from sunset to sunrise at a position 1m high. increased. In addition, when blue LED light was included in the green LED effect, it was proved that more Kjeldahl nitrogen amount increased.

The difference in light quantity between the light quantity of the fluorescent lamp and the light quantity of the LED described above is the difference in the Kjeldahl nitrogen quantity as shown in Attached Table 1 and Attached Table 2, that is, the protein quantity in the body of the strawberry plant. There was a small difference in the incidence of powdery mildew. However, as apparent from the discussion in the “[0032]” and “[0040]” items, the “[0026]”, “[0027]”, “[0028]”, “[0029]”, and “[0030]” items. As shown in, the increase in the amount of Kjeldahl nitrogen caused by irradiation of the growing strawberry plant with the green light from the green fluorescent light and the blue light from the blue fluorescent light, and “[0033]” “[0034]” “[0035]” “ As indicated in the paragraphs [0036] and [0037], excellent effects were obtained even with green light from a green LED and blue light from a blue LED.
The amount of Kjeldahl nitrogen, that is, protein, increases in the body of the grown strawberry plant by irradiation with the green fluorescent light, the blue fluorescent light, the green LED, and the blue LED to the grown strawberry plant, and the occurrence of powdery mildew can be suppressed. But a clear proof was proved.

At the Strawberry Nursery House, explanation will be given based on examples.
FIG. 11 is an elevation view of the pipe house and FIG. 12 is a plan view of the pipe house in the nursery pipe house having a length of 5.4 m and a length of 40 m.

Two rows of green 20 W fluorescent lamps 7 are installed in parallel to the pipe house at a height of 1 m above the upper surface of the strawberry plant seedling 16 placed in the house, and a blue 20 W fluorescent lamp 8 is installed in the center of the two rows. One row was installed in the longitudinal direction of the house. The green light of the fluorescent light 7 installed in the two rows on both sides and the blue light of the fluorescent light 8 installed in the center one row are as uniform as possible on the strawberry plant seedlings. In order to irradiate the strawberry plant seedling 16 with the light beam, as shown in the plan view 12, the distance between the green 20W fluorescent lamps installed in the two rows on both sides is set to 4 m, and the blue 20W fluorescent lamp installed in the central row. The interval of 8 was installed at intervals of 8 m, and blue and green fluorescent lamps were installed at a height of 1 m from the upper surface of the strawberry plant seedling 16.

In the nursery house shown in Fig. 11, the seedling pipe house elevation, Fig. 11, the nursery pipe house plan view, and the seedling house shown in Fig. 12, 8500 seedlings to be planted in this farm were arranged.

Pipeline frontage 5.4m long 40m house that is 2M away from the 5.4m long 40m length house described in "[0044]" No fluorescent lamps are installed in the house In addition, 8500 strains to be planted in the main farm were arranged.

Sunrise from sunset for 30 days from July 30th to August 31st with all green fluorescent lights and blue fluorescent lights on the strawberry plant seedlings of the pipe house where the fluorescent lamps described in "[0044]" are installed The green light from the green fluorescent light and the blue light from the blue fluorescent light were simultaneously turned on at night until the strawberry plant seedling was irradiated. In the daytime, the nursery management according to natural sunlight was maintained for about one month from July 30 to August 31. After August 31, all the green and blue fluorescent lights at night from sunset to sunrise were extinguished, and during the day, seedling management was maintained for about one month from sunrise to sunset.

The nursery pipe house entrance 5.4m long 40m long house without the fluorescent lamp installation described in "[0046]" is dark at night, raising seedlings according to natural sunlight for about one month from sunrise to sunset in the daytime. Retained management.

The seedlings treated with seedlings in the main house, that is, the green light of the green fluorescent light described in the paragraphs “[0046]” and “[0047]”, the blue light of the blue fluorescent light, and no light, “[0046]” “[0047] The strawberry plant seedlings treated as described in the section were planted from September 10 to September 16.

Treated strawberry plant seedlings 16 described in the paragraph “[0048]” for 30 days Example nurturing Pipe house frontage 5.4m length 40m house Strawberry plants treated with green and blue light from fluorescent lamps The pedicel of the strawberry plant seedling without irradiation of the seedling and the fluorescent lamp, the amount of Kjeldahl nitrogen in the leaf body, that is, the comparison of the amount of protein and the strawberry plant seedling with powdery mildew disease is established in the field, the strawberry plant seedling, sample 1, 20 each of 2, 3, 4, 5 and 6 were classified and planted in a control group.

Each sample 1, 2, 3, 4, 5, 6 As a strawberry plant seedling, on the 20th day after planting as a strawberry plant seedling in the mainland, the Kjeldahl nitrogen amount was examined based on the Kjeldahl method, and each sample 1, 2, 3, The average value of 20 strawberry plant seedlings is shown in Appendix 3 for each of 4, 5, and 6.

Each sample 1, 2, 3, 4, 5, 6 strawberry plant seedlings, which are the strawberry plant seedlings, checked the number of powdery mildew occurrence on the 20th day after planting as strawberry plant seedlings in this field, displayed.

The amount of Kjeldahl nitrogen in the strawberry growing leaf, the amount of protein, that is, the amount of protein is not irradiated, green fluorescent light only green light irradiation, blue fluorescent light only blue light irradiation, green fluorescent light Simultaneously irradiate the blue light of the blue fluorescent lamp on the upper surface of the green light irradiation, simultaneously irradiate the green light of the green fluorescent light on the upper surface of the blue light of the blue fluorescent light, and flush with the green light of the green fluorescent light The strawberry plant seedling irradiated to the strawberry plant seedling irradiated simultaneously with the blue light of the blue fluorescent lamp and no light irradiation, the green LED only green light irradiation, the blue LED only blue light irradiation, the green LED Simultaneously irradiate the blue light of the blue LED on the upper surface of the green light irradiation, simultaneously irradiate the green light of the green LED on the upper surface of the blue light irradiation of the blue LED, and flush with the green light irradiation of the green LED The effect of different combinations of irradiation of green light and blue light on the strawberry plant seedlings simultaneously irradiated with the blue light of the blue LED is an indication of some differences in the occurrence of powdery mildew on the strawberry plant seedlings. Table 1 below shows the comparison, and Table 2 shows the comparison by the irradiation of the fluorescent lamp, and Table 2 shows the comparison by the irradiation of the LED.

As shown in Attached Table 1 and Attached Table 2, the strawberry plant seedling irradiated with each light beam of the fluorescent lamp and the LED and the non-irradiated strawberry plant seedling of the fluorescent lamp by the combination of irradiation described in the above “[0052]” This is the number of powdery mildew that occurred 20 days after planting.

Among the numbers of powdery mildew occurrence shown in Attached Table 3, “[0044]”, “[0045]”, “[0046]”, “[0047]”, “[0048]”, “[0049]” , “[0050]”, “[0051]” in the nursery house described in the section 2 of the sample 2 data and sample 3 data of 1 powdery mildew occurred, this strawberry plant seedling udon As for this disease, the strawberry plant seedling average Kjeldahl nitrogen 20 days after planting in 20 fields each of sample 2 and sample 3 shows a high value of 156 PPM in sample 2 and 160 PPM in sample 3.

In the field where sample 2 and sample 3 strawberry plant seedlings were planted, the same effect as after pesticide spraying was achieved without spraying pesticides. It became a symptom of drought change to brown and became the same effect as after pesticide control. Even in the field where sample 1 strawberry plant seedlings were planted, the white spores of powdery mildew became brown and the symptoms of drought change were the same as after pesticide control, and the white spores disappeared 15 days after the powdery mildew occurred. It was.
In addition, even if the strawberry plant seedling is infected with powdery mildew and the powdery mildew fungus is attached to white, the white spore part of the strawberry plant seedling has the same symptoms as the pesticide effect after spraying the pesticide. One powdery white spore drowned brown, and the surrounding strawberry plants were not infected with powdery mildew.
The high values of Kjeldahl Nitrogen 156PPM in Sample 2 and Kjeldahl Nitrogen 160PPM in Sample 3 proved a clear proof of the effect of fluorescent green and blue light.

Among the number of powdery mildew occurrences in Attached Table 3, powdery mildew occurred in the sample 4 data, 5 in the sample 5 data, 10 in the sample 5 data, and 12 in the sample 6 data. After showing the number of Kjeldahl nitrogen and powdery mildew occurrence in Attached Table 3, pesticide control because 10 years later, there were quite a lot of powdery mildew on the strawberry plant seedlings in Sample 4, Sample 5 and Sample 6 The planting seedlings that were next to the plant were so infected that they were infected in large quantities.

The strawberry plant seedling average Kjeldahl nitrogen, which is indicated in Attached Table 3 and 20 days after planting in 20 fields of Sample 4, Sample 5 and Sample 6, respectively, is 111 PPM in Sample 4, 98 PPM in Sample 5 and in Sample 6 Shows 80PPM in Attached Table 3.

In Table 3, a considerably low value is displayed with respect to the average value of 20 Kjeldahl nitrogens of Sample 1, 136 PPM Sample 2, 156 PPM, Sample 3, and 160 PPM.
Sample 1, sample 2 and sample 3 are values of Kjeldahl nitrogen by irradiation with green light and blue light of a fluorescent lamp, and samples 4, sample 5 and sample 6 are values of Kjeldahl nitrogen without irradiation by a fluorescent light Displayed in Attached Table 3 as the difference between the two values.

As described above, “[0044]”, “[0045]”, “[0046]”, “[0047]”, “[0048]”, “[0049]”, “[0050]”, “[0051]”, As described in the embodiments in “[0054]”, “[0055]”, “[0056]”, “[0057]”, and “[0058]”, the green light and the blue light are emitted from sunset. Irradiation at night before sunrise increases Kjeldahl nitrogen in the body of the strawberry plant seedling.
Therefore, proof as an effect of suppressing the occurrence of powdery mildew in the strawberry plant seedling was proved by accumulating a high concentration of the protein that controls the nutrient concentration in the strawberry plant body.

1 ... Blue fluorescent lamp, 2 ... Green fluorescent lamp, 3 ... Blue LED
4 ... Green LED, 13 ... Strawberry plant seedling, 15 ... Strawberry plant seedling,
16 ... Strawberry plant seedling, 7 ... Green fluorescent lamp 8 ... Blue fluorescent lamp,
9 ... pipe house,

Claims (2)

The green fluorescent lamp and the blue fluorescent lamp are arranged in a single plane at a certain height from the upper surface of the cultivated edible plant, and the green light of the green fluorescent lamp and the blue light of the blue fluorescent lamp are placed on the cultivated edible plant. A method of controlling powdery mildew control of the plant, which was irradiated for a certain number of days and increased Kjeldahl nitrogen. The green LED and the blue LED are arranged in a single plane at a certain height from the upper surface of the cultivated edible plant, and the green light of the green LED and the blue light of the blue LED are irradiated to the cultivated edible plant for a certain number of days and nights. The method of controlling powdery mildew control of the plant with increased Kjeldahl nitrogen.

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