Abstract
We investigated the relationship between the number of Trichogramma spp. captured by yellow sticky traps and the number captured by sticky suction traps on the plucking surface and in the space between hedges in tea fields. Our aim was to examine the usefulness of the former type of trap in Trichogramma spp. monitoring. Total number of adult Trichogramma spp. captured by yellow sticky traps and sticky suction traps per trap was 243.8 (the number of traps 12 ; sticky area 200cm2) and 1184.5 (the number of traps 2 ; sticky area 400cm2), respectively, during investigation period. Total number of Trichogramma spp. captured by yellow sticky traps per sticky area was 41% of total number of Trichogramma spp. captured by sticky suction traps. Seasonal changes in the numbers of Trichogramma spp. captured by the yellow sticky traps on the plucking surface, in the space between hedges, and the numbers averaged both parts were synchronized with the seasonal changes in the numbers captured by the sticky suction traps. These results suggested that the yellow sticky traps could be used instead of the sticky suction traps to investigate the occurrence of Trichogramma spp.
