JP2001231358A - Azadirachta indica-containing soil for nursery box for paddy rice - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide healthy and well-grown rice seedling without generating pests. SOLUTION: This soil is obtained by mixing 0.1-5.0 wt.% (based on the soil) ground material of Azadirachta indicia seed, its seed extract or a residue after extraction of the seed with soil used for a nursery box.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a soil for a nursery box capable of suppressing the occurrence of early pests of paddy rice and growing healthy rice seedlings.

[0002]

2. Description of the Related Art In Japan, mechanical transplanting of paddy rice using box-raising seedlings has been popular since about 1970, and almost all rice is currently cultivated by this method. Paddy rice seedlings for machine transplant cultivation are densely planted in seedling boxes (seeding seeds of 150 g to 300 g in seedling boxes of 60 × 30 cm), and growth is promoted by artificial heating. By such an operation, transplantation can be performed early, and a sufficient cultivation period after transplantation can be secured.

[0003]

However, as in the prior art, there is a problem that many pests occur in seedlings that are densely planted in a narrow seedling raising box and heated and cultivated. And, if the typical pests are enumerated, the seedlings withering with the filamentous fungi, the bacterial seedlings withering with the bacteria, the falcon seedling disease,
Blast, rice beetle, rice weevil, etc. that occur in Honda after transplantation are typical. Many pesticides are used to control them, such as disinfection of seeds, mixing of floor soil, and treatment on the day of transplantation.However, there is a problem that sufficient effects cannot be obtained even if rice seedlings are pickled. Was.

The present invention has been made in order to solve the above-mentioned conventional problems, and effectively controls pests occurring in a nursery box for paddy rice and early pests of paddy fields, and from the viewpoint of safety and economy. It is an object of the present invention to provide soil for a paddy rice nursery box containing neem seed crushed material / seed extract or seed extraction residue capable of avoiding excessive administration of pesticides.

[0005]

Means for Solving the Problems The present invention provides a method for adding a crushed seed or extract of seeds of neem (Azadirachta indica) or a residue of seed extraction to soil, and using this as soil for a paddy rice nursery box. ,
The above problem has been solved.

[0006]

BEST MODE FOR CARRYING OUT THE INVENTION The present invention is a soil for a paddy rice nursery box, in which a crushed neem seed, a seed extract or a seed extraction residue is added to the soil and used as a floor soil for a paddy rice nursery box.

The neem used in the present invention is a deciduous tree of the neem family which grows in India and has a height of 12 to 15 m. The leaves are odd-plural compound leaves, the leaflets are opposite, needle-shaped, thin and sharp, with serrated edges. The flowers have a white, nectar scent and a panicle with short axillary floral patterns. The fruits are berries, green to orange-yellow, with one seed in the center. The seeds are wrapped in soft flesh, light gray in color, smooth on the surface, shiny, silky and bitter.

[0008] The neem leaves as described above are used as an exfoliant, a prophylactic agent for parasites, an antidote, a drug for tumors and insect bites, and leaf juice is also used as an anthelmintic and a skin disease drug.
Fruits are effective against urinary diseases, stomachs, intestinal parasites, etc., and seeds are emetics, laxatives and anthelmintics.

The inventor of the present invention has found that the addition of neem seed crushed / seed extract or seed extract residue having various effects described above to the soil for raising rice seedling boxes does not cause the occurrence of pests and rice blasts as in the prior art. The present inventors completed the present invention as a result of various experiments, considering that they would not be affected by diseases and the like.

That is, the present inventor carried out various experiments by changing the blended weight of the nebulized seeds / seed extract of the neem, or the seed extract residue in the soil for raising rice seedlings. By adding 0.0% of neem seed crushed material / seed extract or seed extraction residue to paddy rice nursery box soil, the occurrence of pests can be suppressed, and blast and the like are hardly affected. It was confirmed that healthy seedlings were raised.

The crushed neem seeds are obtained by drying and crushing neem seeds. The particle size of the crushed neem seeds is not required to be limited, but is preferably 100 μm or less. In addition, the neem seed extract is obtained by extracting a dried neem seed component using alcohol or water, and concentrating the extract to remain liquid, or drying the concentrated extract to dry powder. It can also be used as a shape. Further, the neem seed extraction residue is the residue remaining during the production of the neem seed extract.

[0012]

Example 1 Test for rice beetle Test method Soil used: Kumiai granular soil K at a prescribed ratio
Mixed with neem seed crushed material. The target area is the day of transplantation
And granulated Padang granules 4. 2. 2. Rice varieties used: Koshihikari Seedling raising method: Seedling transplantation (species: April 15, 1999)
3. Machine transplantation: May 5, 1999) Distinction / Area: 1m 180m²  5. Survey date and method: On June 1, 1999, the number of adults and eggs
Investigate the number of lumps, larvae and cocoons, calculate the degree of damage, plant height, medicine
Investigate harm at 3 locations in each ward and 30 locations at 1 location. Table 1 shows the test results.

[0013]

[Table 1]

From the test results shown in Table 1, it was confirmed that by mixing 1 g to 50 g of crushed neem seeds per 1 kg of bed soil, the control effect on rice paddy beetle was not inferior to that of the standard drug. The growth of paddy rice was superior to untreated and standard drugs. In addition, "Damage degree" in Table 1 shows the degree of damage of the paddy rice by pests, and "No treatment ratio" shows what percentage of damage was taken assuming no treatment as 100%.

[0015]

Example 2 Test for rice weevil Test method Used soil: Neem seed extract residue is mixed with Kumiai granular soil K at a predetermined ratio. The target area sprayed Admire box granules on the day of transplantation. 2. 2. Rice varieties used: Koshihikari Seedling raising method: Seedling transplant (species: April 8, 1999,
(Machine transplant: April 29, 1999) 4. Classification and area: 50 m ² per ward, 3 wards 5. Investigation date and method: On May 30, 1999, the extent of plant damage, plant height, and phytotoxicity were investigated. Survey of 50 shares per ward. Table 2 shows the test results.

[0016]

[Table 2]

From the test results shown in Table 2, it was confirmed that by mixing 5 g to 50 g of neem seed extract residue per 1 kg of bed soil, the control effect on rice weevil was not inferior to that of the standard drug. The growth of paddy rice was superior to untreated and standard drugs. The "degree of damage" in Table 2 indicates what percentage of the total pests eaten by the pests on the leaves of paddy rice was 100%.

[0018]

Example 3 Test for Blast Test Method 1. Soil used: Liquid neem seed extract was mixed with Kumiai granular soil K at a prescribed ratio. The target plot sprayed Win box granules on the day of transplantation. 2. 2. Rice varieties used: Hitomebore Seedling raising method: Seedling transplant (species: April 13, 1999)
3. Machine transplantation: May 11, 1999) 4. Classification / area: 20 m ² per ward, 3 wards 5. Investigation date / method: On July 22, 1999, the incidence of diseased seedlings, plant height, and phytotoxicity were investigated. Survey of 30 stocks in one ward. Table 3 shows the test results.

[0019]

[Table 3]

From the test results shown in Table 3, it was confirmed that by mixing 1-50 g of liquid neem seed extract per kg of bed soil, control effect on rice blast was not inferior to that of the standard drug. . The growth of paddy rice was superior to untreated and standard drugs. In addition, "the diseased seedling rate" in Table 3 shows how many diseased out of 100 seedlings.

[0021]

Example 4 Test for Blight Blight Bacterial Disease Test Method 1. Soil used: Liquid neem seed extract was mixed with Kumiai granular soil K at a predetermined ratio. The target ward sprayed Techlead C Flowable on the seed paddy on April 26, 1999. 2. 2. Rice varieties used: Niigata Waseda (seed with bacterial wilt disease) Seedling raising method: Species: April 29, 1999 4. 4. Distinction / area: 1 box, 3 boxes (3 sections) Survey date and method: May 16, 1999 (seeding 17
On Sunday), the incidence of diseased seedlings, plant height, and chemical damage were investigated. Survey of 100 shares per ward. Table 4 shows the test results.

[0022]

[Table 4]

From the test results shown in Table 4, by mixing 1-50 g of liquid neem seed extract per 1 kg of bed soil, the control effect against bacterial blight of paddy rice was not inferior to that of the standard drug. Was. The growth of paddy rice was superior to untreated and standard drugs.

It should be noted that in Tables 3 and 4, 1, 5, 50
ml / kg of floor soil is 0.1, 0.5, 5.0 respectively.
% By weight.

[0025]

Industrial Applicability As described above, the present invention provides a method for raising rice seedlings in a ratio of 0.1 to 5.0% by weight of soil crushed seed extract / seed extract or seed extract residue to soil weight. By adding it to the box soil, it is possible to effectively control pests against rice beetle, rice water weevil, blast, blight wilt bacterial disease, etc. It can contribute to economic efficiency.

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Claims (3)

[Claims] 1. A soil for raising rice seedlings, comprising 0.1 to 5.0% by weight of a crushed neem seed based on the weight of the soil. 2. A paddy rice nursery box soil comprising a neem seed extract in an amount of 0.1 to 5.0% by weight based on the weight of the soil. 3. A soil for raising rice seedling boxes, comprising 0.1 to 5.0% by weight of neem seed extraction residue with respect to the soil weight.