JP2007111005A - Method and system for controlling insect pest - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a method and a system for controlling insect pests, with which insect pests including chrysalises and eggs are effectively controlled without influencing crops. <P>SOLUTION: The method for controlling insect pests comprises controlling insect pests of crops 2 by a gaseous component and regulating the concentration of carbon dioxide gas in a region from a ground surface 3 on which the crops 2 are planted to the heights of the crops 2. The product of the concentration of carbon dioxide gas in the region 4 from the ground surface 3 on which crops 2 are planted to the heights of the crops 2 and the retention time of the concentration of carbon dioxide gas is ≥50%×minute. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a pest control method for controlling crop pests with gas components.

  Conventionally, methods using pesticides are known as pest control methods for crops, but there is a need for safe pest control methods because of the danger that residual pesticides have on the human body. As one of such control methods, there is known a pest control method technique for controlling crop pests with gas components described in JP-A-2001-89311 (Patent Document 1).

This provides a method for exterminating small animals effectively by using ozone gas alone or using ozone gas supply and UV lamp lighting in combination.
JP 2001-89311 A

  However, the pest control method for controlling crop pests with ozone gas can avoid problems caused by residual agricultural chemicals, but has no effect on straw and eggs, and may not be able to effectively control pests.

  The present invention has been made in view of the above-described background art, and its problem is that a pest control method and a pest control system capable of effectively controlling pests including cocoons and eggs without affecting crops. Is to provide.

  In order to solve the above-mentioned problems, the invention described in claim 1 is a pest control method for controlling a pest of a crop with a gas component, wherein the carbon dioxide in a region from the ground surface where the crop is planted to the height of the crop is obtained. It is a pest control method characterized by adjusting the gas concentration.

  The invention described in claim 2 is characterized in that the product of the carbon dioxide concentration in the region from the ground surface where the crop is planted to the height of the crop and the carbon dioxide concentration holding time is 50% · min or more. The pest control method according to claim 1.

  Further, the invention described in claim 3 is a carbon dioxide concentration adjusting means in a region from the ground surface where the crop is planted to the height of the crop, and a gas concentration in the region from the ground surface where the crop is planted to the height of the crop. A pest control system comprising: a measuring unit that measures the amount of carbon dioxide and a control unit that controls a carbon dioxide concentration control condition based on a measurement result, wherein the pest is controlled by the pest control method according to claim 1 or 2. is there.

  Here, the height of the crop means the smallest height of the crop that is the target of pest control.

  Carbon dioxide concentration is measured at three points at random from the ground surface where the crop is planted to the height of the crop using a carbon dioxide sensor, detector tube, etc. The average concentration.

  The carbon dioxide gas concentration holding time refers to the elapsed time after the carbon dioxide gas concentration reaches a predetermined value in the region from the ground surface where the crop is planted to the height of the crop.

  According to the invention described in claim 1, since the carbon dioxide gas concentration in the region from the ground surface where the crop is planted to the height of the crop is adjusted, adults, larvae, pupae and eggs are not affected with respect to the crop. Can be effectively controlled. In addition, since carbon dioxide is used, it is possible to fill the gas components from the part close to the ground surface where the crop is planted to the upper side without the need for a separate diffusion device, etc., and the photosynthesis of the crop. Can be promoted.

  According to the second aspect of the present invention, since the carbon dioxide concentration control condition is not less than a certain level, it is possible to reliably control pests.

  According to the invention described in claim 3, since the carbon dioxide concentration control conditions can be controlled according to the measurement result, effective pest control and photosynthesis can be promoted.

  As an embodiment of the present invention, a pest control method and a pest control system 1 corresponding to claims 1 to 3 of the present application will be described with reference to FIG.

  The pest control method of the present embodiment is a pest control method for controlling pests of the crop 2 with gas components as shown in FIG. 1, and includes a region 4 from the ground surface 3 where the crop 2 is planted to the height of the crop 2. It is characterized by adjusting the concentration of carbon dioxide gas.

  The product of the carbon dioxide concentration in the region 4 from the ground surface 3 where the crop 2 is planted to the height of the crop 2 and the carbon dioxide concentration holding time is 50% · min or more.

  The pest control system 1 of the present embodiment includes a carbon dioxide concentration adjusting means 5 in a region 4 from the ground surface 3 where the crop 2 is planted to the height of the crop 2, and the ground surface 3 where the crop 2 is planted. It comprises a measuring means 6 for measuring the gas concentration in the region 4 up to the height and a control means 7 for controlling the carbon dioxide concentration adjusting condition from the measurement result, and controlling the pests by the pest controlling method according to this embodiment. Features.

  Hereinafter, the pest control method and the pest control system 1 according to the present embodiment will be described in more detail.

  First, carbon dioxide gas is commercially available, and in this embodiment, a cylinder is used.

  The carbon dioxide concentration adjusting means 5 is a regulator attached to the cylinder, and the carbon dioxide concentration in the region 4 from the ground surface 3 where the crop 2 is planted to the height of the crop is adjusted by adjusting the degree of opening and closing. Is done.

  The measuring means 6 is a general-purpose gas detector, and a carbon dioxide sensor is used in this embodiment.

  The control means 7 includes a microcomputer or the like as a main component, and is connected to the measurement means, and according to the carbon dioxide concentration measured by the measurement means, the degree of opening and closing of the regulator that is the carbon dioxide concentration adjusting means is adjusted. Adjust.

  The crop 2 is a general crop, but is particularly suitable for crops that eat fruits and leaves such as fruit vegetables and leaf vegetables because the use of agricultural chemicals is particularly difficult near the harvest.

  Examples of pests include mosquitoes, flies, fleas, caterpillars, cockroaches, beetles, aphids, planthoppers, termites, and ticks. In this embodiment, they are thrips, leafhoppers, and moths.

  The ground surface 3 on which the crop 2 is planted refers to the ground surface of the field, and in this embodiment, the periphery is surrounded by a vinyl sheet so that the installation height is larger than the height of the planted crop 2. . As a result, the region 4 from the ground surface 3 where the crop 2 is planted to the height of the crop 2 is a region having a length of 50 m, a width of 5 m, and a height of 3 m in this embodiment. Here, in the region 4 from the ground surface 3 where the crop 2 is planted to the height of the crop 2, a diffusion fan 8 is installed so that a gentle air current circulates in order to distribute carbon dioxide more efficiently. It has become. In addition, when the crop 2 is in a substantially sealed space such as a vinyl house, the enclosure with the vinyl sheet can be omitted.

  Here, Examples 1 to 6 and Comparative Examples 1 to 6 of the present invention will be described with respect to measurement results of carbon dioxide concentration, carbon dioxide concentration retention time, and control characteristics.

  Here, the pest control property is that about 500 thrips (about 200 adults, about 100 larvae, about 100 pupae and about 100 eggs) are released on the ground surface 3 where the crops are planted, and are applied to the present invention. This control method was performed, and the number of pests on the ground surface 3 and the ground 4 thereafter was obtained.

  As shown above, as is apparent from the results of Examples 1 to 6 and Comparative Examples 1 to 6, according to this embodiment, the region 4 from the ground surface 3 where the crop 2 is planted to the height of the crop 2 is shown. Since the carbon dioxide concentration is adjusted, it is possible to effectively control the straw and eggs without affecting the crop 2. Further, since carbon dioxide is used, it becomes possible to fill the gas components upward from the portion close to the ground surface 3 where the crop 2 is planted without requiring a separate diffusion device, etc., and the crop 2 Can promote photosynthesis.

  Further, as is apparent from the results of Examples 1 to 6, according to this embodiment, the carbon dioxide concentration control condition is not less than a certain level, so that pests can be reliably controlled.

  Further, as is apparent from the results of Examples 1 to 6, according to the present embodiment, the carbon dioxide concentration control condition can be controlled according to the measurement result, so that effective pest control and promotion of photosynthesis are possible. Become.

The perspective view of the pest control system in one Embodiment of this invention Explanatory drawing of the area | region from the ground surface where the crop was planted to the height of a crop in one Embodiment of this invention

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Pest control system 2 Crop 3 Ground surface 4 Area | region from the ground surface where the crop was planted to the height of the crop 5 Carbon dioxide concentration control means 6 Measurement means 7 Control means

Claims (3)

  A pest control method for controlling a pest of a crop with a gas component, the method comprising controlling a carbon dioxide gas concentration in a region from a ground surface where the crop is planted to a height of the crop.   2. The method for controlling pests according to claim 1, wherein the product of the carbon dioxide concentration in the region from the ground surface where the crop is planted to the height of the crop and the carbon dioxide concentration retention time is 50% · min or more.   Carbon dioxide concentration adjustment means in the area from the ground surface where the crop is planted to the height of the crop, measurement means for measuring the gas concentration in the area from the ground surface where the crop is planted to the height of the crop, and carbon dioxide from the measurement result A pest control system comprising: control means for controlling gas concentration adjustment conditions; and controlling pests by the pest control method according to claim 1 or 2.

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