Abstract:
[Aim] To
investigate the phototaxis, chromotaxis and chemotaxis in the ant Camponotus japonicus to determine if it is possible to use color,
light and odor to repel or exclude this insect pest from some specific places
(e.g. the home environment and parks). [Methods] The chromotaxis and phototaxis of C.
japonicus were evaluated in response to seven color plates (red, orange,
yellow, green, cyan, blue and purple) and six colored lights (red, orange,
yellow, green, blue and purple). And the chemotaxis of C. japonicus was
also tested in response to eight volatile substances, including four types of
highly volatile terpenoids (laurel, limonene, linalool and geranyllol), two
types of volatile lipids (cinnamyl acetate and trans-Cinnamaldehyde).
and two types of weakly volatile unsaturated fatty acids (i.e., oleic acid and
linoleic acid). [Results] There
were significant differences in the phototaxis of C. japonicus toward
different color plates or lights (P<0.01). The preference of C.
japonicus for orange, green and red was 69.91%, 69.66% and 67.70%,
respectively (indicating obvious attraction), whereas that for cyan was just
39.71% (indicating obvious repellent). Moreover, the chromotaxis of C.
japonicus toward red, orange, yellow, green and blue was 60.10%-67.20% (the
strongest attraction to red light.), whereas its chromotaxis toward purple was
just 22.13% (indicating obvious repellent). Furthermore, there was significant
negative chemotaxis for C. japonicus to four terpenes, two lipids and
two acids at three concentrations (0.1%, 1% and 10%) with the chemotaxis rates
≤27.19% (P<0.001). And the most repellent was 10% linalool, followed
by 0.1% trans-Cinnamaldehyde, with the chemotaxis rates of
-78.53% and -74.44%, respectively. [Conclusion] During the hours of daylight, color plates
(or belts) of red, orange and green can attract C. japonicus, whereas
cyan plates (or belts) can repel this species of insect pest. After dark, red,
orange, yellow, green and blue lights are attractive to C. japonicus, whereas
purple light is repellent. Solutions of 10% linalool and 0.1% trans-Cinnamaldehyde
can also be used to repel C. japonicus during both day and night.