Yellow sticky boards: a possible way of monitoring little spruce sawfly (Pristiphora abietina) (Hymenoptera: Tenthredinidae)
2006
Holusa, J.(Vyzkumny Ustav Lesniho Hospodarstvi a Myslivosti, Frydek-Mistek (Czech Republic)) E-mail:[email protected] | Drapela, K.(Mendelova Zemedelska a Lesnicka Univ., Brno (Czech Republic). Lesnicka a Drevarska Fakulta)
Several methods of catching Pristiphora abietina adults were compared (Malaise trap, white and yellow sticky boards, sweeping). The yellow sticky boards are handy in the field, and appear to be a reliable method of detecting sawfly populations when the population density is high. IN adition, there was a significant coincidence between the samples of Malaise traps and yellow sticky boards. There was a highly significant linear correlation between the number of caught adults on five sticky boards and the degree of defoliation in seven localities. We did not observe any significant differences between the samples on yellow sticky boards taken in different intervals. It is sufficient to install yellow sticky boards before swarming and check them after the swarming to estimate the abundance of adults. The number of boards in lines had no influence on the number of adult sawflies catched per board.
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