Images and datesets in the article: Attraction of the Japanese pine sawyer Monochamus alternatus to trimmed pine trees
datasetposted on 2021-11-11, 05:59 authored by Kojiro Esaki
In this study, we aimed to evaluate the risk of pine wilt disease (PWD) caused by pinewood nematode (PWN) due to the trimming of pine twigs. For this, we determined if the pine twig trimming attracts the adults of the Japanese pine sawyer (Monochamus alternatus), a potential vector of this disease. Twelve healthy pine (Pinus densiflora) trees (six each in the treatment and control group) were selected as test trees. Twigs of the six individuals in the treatment group were intensively trimmed in mid-July 2020. In figure 1 files the map of positions of P. densiflora trees used in the experiment in a pine plantation was shown. In two figure 2 files (image and dataset) were showed the distribution of twig age by the number of cut positions and the number and weight of twigs following trimming. Feeding wounds and oviposition scars created by M. alternatus following trimming were compared between the treatment and control groups. The number of feeding wounds did not significantly differ between the two groups (mean, 4.7 and 4.0 per tree). However, oviposition scars were observed only in the treatment group (mean, 1.8 per tree), indicating a significant treatment effect. In Figure 3. images of the feeding wounds and oviposition scars created by M. alternatus adults on pine trees following twig trimming were described. In two figure 4 files (image and dataset), showing that number of scars per tree and proportion of trees with the scar(s) in the treatment and control groups. Figure 5 was showed a M. alternatus male attracted to the cross section left behind by twig trimming on treatment tree C (photographed at 18:07 on July 18, 2020).