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

Claim 0:
1. A method for trapping indoor adult Phycitinae, which is an adult moth belonging to Phycitinae subfamily and 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 by the attracting light to guide the adult Phycitinae 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 Phycitinae behavior with the emission end of the attracting light formed by the attracting light in which a 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, and the guide path being on a lower side of the behavior suppression boundary; and
trapping the adult Phycitinae 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),
wherein the narrow-angle light distribution angle (θn/2) of the attracting light is an angle in a range that satisfies a relationship of L×tan(θn/2)<H, and
wherein L is a distance at which the value of the photon flux density of the attracting light emitted at a predetermined photon flux density attenuates to a value less than a behavior suppression light amount in an atmosphere, and wherein H is a height of the emission end of the light source
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.