Patent ID: 11968970
Assignee: JAPAN TOBACCO INC.
Field: Other special machines (Mechanical engineering)
Classification: CPC A  Y | IPC A

Claim 13:
14. A method for trapping adult tobacco moths which is a grain-storage insect pest, the method comprising:
emitting attracting light from a light source at a predetermined photon flux density;
forming:
a guide path to guide the adult tobacco moths to a vicinity of an emission end of the attracting light in a region having a photon flux density lower than the predetermined photon flux density on a side lower than a height of the emission end;
a behavior suppression region configured to suppress the adult tobacco moths behavior with the emission end of the attracting light formed by the attracting light in which value of the photon flux density of the attracting light is equal to or greater than the value of the photon flux density of the attracting light in the guide path; and
a behavior suppression boundary formed by the attracting light which is deviated from an optical axis of the light source by a predetermined angle or more, the behavior suppression region being on an upper side of the behavior suppression boundary, the guide path being on a lower side of the behavior suppression boundary; and

trapping the adult tobacco moths attracted by the attracting light in the guide path,
wherein an angle formed by the light source is set as follows:
when an angle formed by the optical axis of the light source and the behavior suppression boundary is defined as a light distribution angle (θ/2) of the light source, the light source is configured to emit the attracting light having a narrow-angle light distribution angle (θn/2), and
wherein the photon flux density d [photons/m2/s] of the attracting light in the guide path satisfies a relationship expressed by:

0<d<20×1014.