DIGITALNA ARHIVA ŠUMARSKOG LISTA
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| ŠUMARSKI LIST 3-4/2021 str. 65 <-- 65 --> PDF |
Significant differences in the mean total capture of Ips sexdentatus were noted among the five trap colors (df = 4, p < 0.005) (Figure 3). Post hoc Dunn’s test showed that significantly more Ips sexdentatus were captured by black traps than white ones (p<0.003) (Table 2). No significant differences were occurred among the other trap colors (Table 3). Although there were no statistically significant differences in numbers of Thanasimus formicarius captured between the trap colors (p<0.098), white-color trap was the least attractive pheromone trap followed by yellow, red, green, and black traps (Fig. 1). Pearson correlation analysis was performed to determine the relationship between the number of Ips sexdentatus and Thanasimus formicarius captured by pheromone traps. The test indicated that a significant and positive relationship existed between the pest and the predator (p <0.01) (Table 4). In this study, dark traps (Black, Green and Red) were found to be more effective in attracting insects than light traps in general (Yellow and White). This result is consistent with Chen et al. (2009)’s findings on I. duplicatus. In addition, Strom et al. (1999) and Strom and Goyer (2001) showed that funnel-type black-colored traps caught more Dendroctonus frontalis and D. brevicomis than white-colored traps. Dubbel et al. (1985) found that for I. typographus and Trypodendron lineatum no significant differences were observed in clear, black, green, grey and redbrown traps, whereas catches in white traps were significantly lower. Mizell III and Tedders (1999) reported that dark colored |