JOURNAL OF NANJING FORESTRY UNIVERSITY ›› 2020, Vol. 44 ›› Issue (4): 125-130.doi: 10.3969/j.issn.1000-2006.202002029

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Trapping efficacy of different attractants and traps on Scythropus yasumatsui adults in field

YAN Xiongfei(), WANG Yawen, LI Gang, LIU Yonghua, ZHANG Youyi   

  1. College of Life Sciences, Yulin University, Yulin 719000, China
  • Received:2020-02-20 Revised:2020-06-18 Online:2020-07-22 Published:2020-08-13

Abstract: Objective

Scythropus yasumatsui is an important pest of jujube trees. In order to provide a theoretical basis for the field monitoring and control of this pest, trapping efficacy of different attractants, different colors of traps and different suspending heights on trapping S. yasumatsui adults in the field was compared.

Method

Trapping efficacy of different attractants, different suspending height and color of traps on S. yasumatsu were tested in jujube orchard of northern Shaanxi from March 2018 to May 2019. The compositions of attractant A and attractant B were ocimene and α-farnesene, respectively. The composition of attractant C was the blends, in which ocimene volume ratios of and ocimene to α-farnesene was 1∶1. Five kinds of traps are yellow green, white, red, black and yellow,and the suspending heights of five kinds of traps are 0.4, 0.8, 1.2, 1.6 and 2.0 m,respectively.

Result

The mean daily trapping amount of each trap of three kinds attractants was significantly higher than that of the control, and the highest mean daily trapping amount of each trap of attractant C was 2.66, significantly higher than that of the attractant B and attractant A. The mean daily trapping amount of each trap at different heights in a descending order were 0.8,1.2 , 0.4 ,1.6, 2.0 m above the ground. The mean daily trapping amount of each trap at 0.8 and 1.2 m was 3.58 and 3.96 respectively, which was significantly higher than the other three heights. The highest mean daily trapping number of yellow green traps is 5.82, which is significantly higher than that of the other four kinds of color traps, and the lowest mean daily trapping number of yellow traps is 1.46.

Conclusion

These suggested that all of three attractants for capturing S. yasunatsui had trapping efficacy, and attractant C had the best trapping efficacy. Yellow green traps had the best trapping efficacy for capturing weevles,while yellow traps had the worst. The hanging height of 0.8 and 1.2 m had the better trapping efficacy for capturing weevles.The feasible height on capturing S. yasunatsui of the trap 0.8 and 1.2 m, and yellow green traps were suitable for the capture S. yasunatsui. It was recommended that field monitoring and control of S. yasunatsui should be applied in production practice.

Key words: Scythropus yasumatsui, attractant, trap color, trap suspension height, trapping efficacy

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