Phototaxis of adult Cryptolestes ferrugineus (Stephens)
Author of the article:WANG Zheng-Yan** MIAO Shi-Yuan LU Yu-Jie
Author's Workplace:School of Food Science and Technology, Collaborative Innovation Centre of Henan Grain Crops, Henan Collaborative Innovation Centre of Grain Storage and Security, Henan University of Technology, Zhengzhou 450001, China
Key Words:Cryptolestes ferrugineus (Stephens), phototaxis, wavelength, age, mating status
Abstract:
[Objectives] To verify the feasibility of light trapping as a means of controlling Cryptolestes ferrugineus (Stephens). [Methods] The phototaxis of C. ferrugineus adults was tested with different lights under laboratory conditions. [Results] C. ferrugineus adults showed positive phototaxis to all lights tested. Among the visible lights tested, that with a main wavelength of 575 nm elicited the highest phototaxic response, followed by those with main wavelengths of 430, 495, 620, 530 and 450 nm. Among the ultraviolet lights tested, that with a main wavelength of 385 nm elicited the highest phototaxic response, followed by those with main wavelengths of 365, 375 and 395 nm. Phototaxis in one to 10 day old beetles initially increased, stabilized, and then declined to some extent with age. Females exhibited stronger phototaxis than males. In addition, mating status had a significant effect on the phototaxis of both males and females; phototaxis in males was significantly inhibited by mating but mated females showed stronger phototaxis than virgin females. Short-term starvation and prior experience of the same light source did not influence phototaxis. [Conclusion] Preference of adult C. ferrugineus for specific light wavelengths confirms the feasibility of light trapping as a means of controlling this pest.