Relative effectiveness of different colored sticky cards and hanging modes for trapping Scythropus yasumatsui
Author of the article:JING Rui YAN Xiong-Fei ZHANG Peng HE Ying LI Gang DANG Cheng-Cheng LIU Yong-Hua
Author's Workplace:College of Life and Science, Yulin University, Yulin 719000, China;College of Life and Science, Yulin University, Yulin 719000, China;College of Life and Science, Yulin University, Yulin 719000, China;College of Life and Science, Yulin University, Yulin 719000, China;College of Life and Science, Yulin University, Yulin 719000, China;College of Life and Science, Yulin University, Yulin 719000, China;College of Life and Science, Yulin University, Yulin 719000, China
Key Words:Scythropus yasumatsui; sticky card; hanging methods; trapping effect
Abstract:
[Objectives] To investigate the relative effectiveness of
different colored sticky cards and hanging modes to trap Scythropus yasumatsui, and thereby improve the monitoring and
environmentally-friendly control of this pest. [Methods] The trapping
efficacy of different sticky card colors, suspended at different heights,
orientated in different directions and hung at different densities, were tested
in a jujube orchard in Jiaxian county, northern Shaanxi from April 2018 to May
2020. The colors tested
were yellow-green, yellow, dark green, white, red and blue, which were hung at
either 0.4, 0.8, 1.2, 1.6 or 2.0 m above ground. Cards were orientated facing
either due east, due south, due west, due north or centered, at densities of
20, 30, 40 and 50 cards/667 m2. [Results] Yellow-green cards caught a daily average
of 7.3 S. yasumatsui per card; significantly more than the other
five colors (P<0.05). Dark green
cards were the next most effective; there was no significant difference in the
number of insects trapped by white, red or blue cards. Yellow cards caught an
average of 1.8 S. yasumatsui per card; significantly less than
the other 5 colors (P<0.05). The
relative effectiveness of different card suspension heights was, in descending
order: 0.8 m>0.4 m=1.2 m>1.6 m>2.0 m. Cards hung at 0.8 m caught a
daily average of 8.3 insects per
card, significantly higher than the other 4 heights (P<0.05). Cards orientated due south caught significantly more S. yasumatsui than those orientated in other directions (P<0.05), followed by those that were
orientated due east or centered. Those orientated due west or due north caught significantly fewer insects
than those orientated in other directions (P<0.05).
A card density of 20 cards/667 m2 was the most economical and efficient. [Conclusion] Yellow-green color sticky cards hung at a
height of 0.8 m above ground, orientated towards the south and deployed at a
density of 20 cards/667 m2, are most effective for monitoring and
controlling S. yasumatsui in a jujube orchards.