Attractiveness of Light-emitting Diode to Adult Rice Leaf Bug, Trigonotylus caelestialium(Heteroptera: Miridae)

Abstract

In the laboratory, the adult rice leaf bug, Trigonotylus caelestialium (Kirkaldy), most preferred 375 nm light-emitting diodes (LED) among lights of four wavelengths ranging from 375 to 450 nm with constant light intensity. Under a rated output current condition, short-wavelength range LEDs (375 nm, 400 nm) attracted more bugs than long-wavelength range LEDs (505–600 nm). In the field, the prototype LED (375 or 400 nm) trap caught few adult bugs of the overwintering generation in the spring (April to mid-June), while it caught adult bugs continuously during the summer (late June to September). Many adult bugs of the presumed second generation, which is considered to be especially related to pecky rice damage, were caught in the trap from late July to mid-August. Thus, LED traps might be useful tools to monitor T. carestialium under field conditions.