Trapping Effects of 12 Aggregation Pheromones on Rubber Bark Beetles

doi:10.3969/j.issn.1000-2561.2019.12.017

Abstract

Abstract:

This study aims to understand the trapping effects of 12 aggregation pheromones on rubber bark beetles. Field pest investigation together with one-way ANOVA multiple comparisons were used to compare the trapping effect of the aggregation pheromones. The results showed that the trapping effects of the 12 aggregation pheromones on rubber bark beetles were significantly different in different spacing and suspension heights of field traps. The trapping effects of 20, 35 and 50 m spacing were significantly higher than those of 65 m and 80 m spacing. The trapping effects of 2.0 m and 2.5 m suspension height were significantly higher than those of 1.5, 3.0 and 3.5 m. The trapping effects of (S)-(-)-ipsenol, (S)-(+)-ipsdienol, (4S)-cis-verbenol showed the best effect, the average number of traps per day of 20, 35 and 50 m was 56.89, 59.06 and 56.42, 54.69, 57.38 and 53.89, 51.27, 54.81 and 50.36, respectively; the average number of traps per day of 2.0 m and 2.5 m hanging height was 57.89 and 59.06, 53.77 and 57.38, 50.63 and 54.81, correspondingly, the percentage of the number of Xyleborus perforans and Xyleborus aquilus was 48.28% and 41.12%, 47.89% and 41.08%, 47.69% and 41.05%, separately, the average number of traps per day was 28.51 and 23.69, 27.48 and 23.00, 26.14 and 21.95, respectively. α-Pinene and dimethyl bark beetle bait also had better trapping effects on rubber bark beetles, the average number of traps per day of 20, 35 and 50 m spacing was 19.24, 22.16, 18.12 and 18.42, 20.96, 18.12, correspondingly; the average number of traps per day of 2.0 and 2.5 m hanging height was 18.23 and 22.16, 16.32 and 20.96, respectively; the percentage of the number of X. perforans and X. aquilus was 47.26% and 40.02%, 47.12% and 40.02%, separately, the average number of traps per day was 10.47 and 8.87, 9.88 and 8.39, respectively. With the increase of field time, the trapping effects of the 12 pheromones on rubber bark beetles increased gradually at first, reached the peak at 30 days, then decreased gradually, and decreased significantly after 60 days. (S)-(-)-ipsenol, (S)-(+)-ipsdienol and (4S)-cis-verbenol had the best trapping effects and α-pinene and dimethyl bark beetle bait had also good trapping effects on rubber bark beetle, and the suitable field spacing, suspension height and the effective period of the five aggregation pheromones was 35-50 m, 2.0-2.5 m and 60 d, correspondingly.

Key words: aggregation pheromones, rubber bark beetle, trapping effect

CLC Number:

CHEN Qing,LIANG Xiao,WU Chunling,CHEN Qian,ZHANG Zhe. Trapping Effects of 12 Aggregation Pheromones on Rubber Bark Beetles[J]. Chinese Journal of Tropical Crops, 2019, 40(12): 2432-2439.

Figures/Tables 5

Fig. 1 Trapping effect of 12 aggregation pheromones on rubber bark beetles at different spacing in field traps Different capital letters indicated that the same aggregate pheromone had significant difference among different spacing (P<0.05); different lower-case letters indicated that different aggregate pheromones had significant difference among the same spacing (P<0.05).

Fig. 2 Trapping effect of 12 aggregation pheromones on rubber bark beetles at different suspension heights in field traps

Fig. 3 Percentage of different species of rubber bark beetle trapped by different aggregation pheromones to the total number of trapped insects

Fig. 4 Average number of traps per day for different species of rubber bark beetles by different aggregation pheromones

Fig. 5 Temporal dynamics of 12 aggregated pheromones trapping rubber bark beetles

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