JP2004201600A - Dip type pest-exterminating method of plant with attached flying pest - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a dip type pest-exterminating method by which a flying pest attached to a plant can precisely be exterminated by dipping the plant in an aqueous solution while preventing the pest from escaping. <P>SOLUTION: The method comprises preparing the aqueous solution into which the plant is dipped and which is used for exterminating the pest, so as to be in a state in which the plant is not damaged by the dipping, covering the whole plant having the flying pest, or the flying pest and an unflying pest attached thereto with a water-permeable cover through which the flying pest can not pass, dipping the plant covered with the water-permeable cover in the prepared aqueous solution for a time required for deadening the pest, pulling up the plant from the aqueous solution, and taking off the water-permeable cover therefrom to carry out the extermination of the pest. <P>COPYRIGHT: (C)2004,JPO&NCIPI

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to an immersion pest control method for a plant to which a tracheal respiratory pest, which can fly by a feather such as planthopper, leaf fly, whiteflies, moth, stink bugs, and ladybirds, is attached.
[0002]
[Prior art]
The inventor of the present invention, as a method of controlling pests that do not fly in the tracheal breathing type, such as aphids, caterpillars, and caterpillars attached to plants, suffocates the pests by immersing the plants to which these pests are attached in an aqueous solution. In addition to focusing on this point, various studies have been made on a method of preventing damage to the plant when the plant is immersed in an aqueous solution for a long time.
[0003]
As a result, the concentration of the aqueous solution to be used for immersion of the plant is adjusted from a concentration higher by about 0.3 mol / l (molar concentration) to a concentration of 0 than the concentration of the cell solution of the plant, and the aqueous solution adjusted to the above concentration A pest control method was proposed in which a plant to which a pest was attached was immersed for a period of time required for the pest to die (Japanese Patent No. 300446).
[0004]
Here, the concentration of the plant cell solution varies depending on the type of the plant, but is 0.2 to 0.8 mol / l at room temperature, and the killing time due to the immersion of the insect pest is about 3 to 4 hours for the aphid, and Is a minimum of about 30 minutes to 2 hours.
[0005]
However, for example, in a hydroponic cultivation in which a plant is planted on a planting panel floating on the surface of a culture solution in a cultivation tank, when performing a conventional pest control method on a plant to which flying pests are attached, the planting panel is used together with the plant to obtain a culture solution. If you try to sink it inside, the flying pests attached to the plant will fly off the plant, making extermination almost impossible.
[0006]
[Problems to be solved by the invention]
An object of the present invention is to immerse a plant to which a flying pest has adhered in an aqueous solution together with the plant without allowing the pest to escape.
[0007]
[Means for Solving the Problems]
As means for solving the above problems, the present invention provides:
To adjust the aqueous solution in which the plant should be immersed for pest control, so as not to damage the plant by immersion,
Covering the entire plant to which the flying pests or flying pests and non-flying pests are attached with a water-permeable cover that does not allow the flying pests to pass through,
The plant covered by the water-permeable cover is immersed in the adjusted aqueous solution for a time required for the death of the pest,
Withdrawing the plant from the aqueous solution after immersion, and removing the water-permeable cover,
We propose an immersion pest control method for plants to which flying pests are attached.
[0008]
Specific examples of the above-mentioned "water-permeable cover" in the present invention include coarse woven fabrics (for example, cold gauze), split-fiber nonwoven fabrics, a number of perforated synthetic resin sheets, and the like, in which the textures or holes allow water to pass through. Those that do not pass pests that fly are used.
The dead time of immersion of the flying pest is about 15 minutes at a minimum for the leaf fly and about 30 minutes to 1 hour for other pests.
[0009]
Plants suitable for carrying out the method of the present invention are plants cultivated by methods such as hydroponics, gravel cultivation, and rock wool cultivation, but are not limited thereto.
[0010]
Further, the term "aqueous solution to be immersed in a plant" used in the present invention refers to a case where a culture solution used for hydroponic cultivation or the like is used for immersion, and water, saline, or sucrose water prepared separately. Including cases.
Hereinafter, embodiments of the method of the present invention will be described with reference to the drawings.
[0011]
【Example】
[Example 1]
In FIG. 1, a culture solution (2) composed of water and various nutrients is placed in a box-shaped hydroponic cultivation tank (1) having an open upper surface, and can be settled by its own weight on the surface of the culture solution (2). The planting panel (3) is supported, and the planting holes (4)... Penetrating the plate surface of the planting panel (3) hold the bases of the plants (for example, spinach) (P). Is immersed in the culture solution (2) below the panel.
[0012]
The planting panel (3) is a rectangular plate made of a synthetic resin, and a rectangular weight and frame member (5) made of a synthetic resin pipe filled with sand or gravel is fixed to the lower surface of the four sides of the rectangular plate, and a self-sinking type. One end of each of the ropes (6) and (6) having a plurality of rings (7)... Is connected to opposite side ends of the panel (3), respectively. ) Is guided outside beyond the upper end of the opposite side wall of the cultivation tub (1), and a required ring (7) is engaged with hooks (8) and (8) projecting from the outer side surface of the side wall. Then, the entire panel (3) is supported at the hydroponic cultivation height shown in FIG.
[0013]
The water-permeable cover (9) for covering the plants is made of a cold gauze having a weave that cannot pass the flying pests, and as shown in FIG. 2, the top cloth (10), the front and rear side cloths (11), (11) and the left and right The cover (9) is a mosquito net-shaped open-faced bottom made of side cloths (12) and (12), and is covered with a cover (9) inside a box-shaped support frame (13) made of a lightweight metal pipe such as an aluminum alloy. Are suspended at four corners of the upper surface by a string (14).
[0014]
Since the concentration of the cell solution of the spinach is 0.3 mol / l (molar concentration), when the culture solution (2) is used as an aqueous solution for immersion, the concentration is 0.3 mol / l higher than the concentration of the cell solution. Adjust to 0.6 mol / l.
[0015]
In the process of cultivation by the hydroponic cultivation tank (1), when the insect pests such as the insect beetles and ladybugs that fly to the plant (P), and the insects that do not fly, the aphids and the caterpillars, the control of these insects is performed as follows.
The supporting frame (13) on which the cover (9) is hung is placed on a plant (P)... Planting panel (3) as shown in FIG. Cover. In this case, the lower end of the cover (9) is preferably sandwiched between the support frame (13) and the panel (3).
[0016]
Next, the rings (7) and (7) of the ropes (6) and (6) are detached from the hooks (8) and (8), and the ropes (6) and (6) are gradually loosened so that the plant planting panel ( 3) is submerged in the culture solution (2). Pests flying out of the plants (P) are sealed in the cover (9). The panel (3) is lowered until the cover (9) is completely immersed in the culture solution (2) as shown in FIG. 3 (c), and in this state, the required ring (7) of the ropes (6) and (6) is ) And (7) are locked to hooks (8) and (8).
[0017]
In the above state, the culture solution (2) was immersed at a liquid temperature of 20 ° C. for 4 hours and 10 minutes. After about 1 hour from the start of immersion, the beetles and ladybirds suffocate, and after 2 hours, the beetles and the aphids after 4 hours further suffocate and sink in the liquid.
[0018]
In addition, due to the immersion, the water in the cells of the plant gradually exudes into the ligament, and the cytoplasm in the cells shrinks with the immersion, eventually causing the separation of the cytoplasm. However, since the concentration of the culture solution (2) is higher than the concentration of the plant cell solution (0.3 mol / l) by 0.3 mol / l so as to ensure reversion to the cytoplasm, the concentration of The resulting protoplasmic separation stops at the initial separation and does not proceed to a significant separation that leads to cell death.
[0019]
After completion of the immersion, the ropes (6) and (6) are pulled up, and the required rings (7) and (7) are hooked (8) with the plant (P) ... planting panel (3) raised to the liquid level. ) And (8), and then the support frame (13) and the cover (9) are removed from the panel (3) and returned to the original state of hydroponics. The plant (P) ... is supplied with water absorbed from its roots in a state where the pests have been eliminated, whereby each cell which has undergone the initial protoplasmic separation as described above returns to the protoplasm and Then, photosynthesis is started, and normal growth is performed thereafter.
[0020]
[Example 2]
This example is an example in which, in hydroponic cultivation of salad na using the same cultivation tank (1) and planting panel (3) as in FIG. 1, flying pests leaf fly, stink bugs, stray insects, non-flying insects and bugs are attached to the salad na. . The culture solution (2) in the cultivation tank (1) is once collected in another tank, water is injected into the tank (1) instead, and then the cover (9) and the hanging support frame (13) are used as in the above example. Similarly, the plant (P) is placed on the panel (3) and covered with the cover (9). Then, the panel (3) is submerged in water and immersed. The flying pests fly away from the plants (P) but are sealed in the cover (9).
[0021]
The immersion was performed at a water temperature of 18 ° C. for 2 hours. As a result, the above-mentioned pests could be controlled.
[0022]
By the above immersion, the plant cells absorb the water for treating insect pests and the protoplasm swells. As the cell expands, the concentration and osmotic pressure in the cell decrease, and the turgor pressure increases.When the wall pressure equal in size to the turgor pressure becomes equal to the osmotic pressure in the cell, water absorption from the outside occurs. Stop and no more huge.
[0023]
After the immersion, the water in the tank (1) is drained, the culture solution collected in another tank is returned to the tank (1), and the original hydroponic culture is resumed. Each cell of the plant (P)... Swollen by water absorption during the immersion gradually returns to normal.
[0024]
The cover (9) covers the plant (P) as shown in FIG. 1 (b) at night other than during immersion, in order to prevent pests that fly a lot during the night from adhering to the plant (P). It is also good to put.
[0025]
【The invention's effect】
According to the immersion-type pest control method for plants with flying pests of the present invention, when immersing the plants in the aqueous solution, the flying pests attached to the plants by the water-permeable cover are captured without trapping them in the aqueous solution together with the plants. It can be immersed and removed reliably.
[Brief description of the drawings]
FIG. 1A is a cross-sectional view of a hydroponic cultivation tank.
(B) It is the same view as the above with the water-permeable cover set.
(C) FIG.
FIG. 2 is a perspective view of a support frame on which a cover is suspended.
[Explanation of symbols]
1 Hydroponics tank 2 Culture medium 9 Cover P Plant

Claims (1)

To adjust the aqueous solution in which the plant should be immersed for pest control, so as not to damage the plant by immersion,
Covering the entire plant to which the flying pests or flying pests and non-flying pests are attached with a water-permeable cover that does not allow the flying pests to pass through,
The plant covered by the water-permeable cover is immersed in the adjusted aqueous solution for a time required for the death of the pest,
Withdrawing the plant from the aqueous solution after immersion, and removing the water-permeable cover,
A method for controlling pests on plants to which flying pests are attached, comprising:

Images