Comparative analysis of the control effects of three ultraviolet wavelengths on Aleuroglyphus ovatus(Troupeau)
[Aim]Aleuroglyphus ovatus(Troupeau)is a widespread storage mite that causes serious economic losses.This study aimed to investigate the effect of different ultraviolet(UV)wavelengths on the survival,hatching rate,and fecundity of A.ovatus,providing a theoretical basis and an innovative approach for managing mite infestations in domestic environments and grain storage areas.[Methods]The mortality of A.ovatus at each developmental stage(adult,tritonymph,protonymph,larvae,and egg),egg hatching rate,egg laying capacity,and vitellogenin(Vg)gene expression were measured after treatments with UV-A(365 nm),UV-B(308 nm),and UV-C(254 nm)(15 W).Statistical analysis was carried out using IBM SPSS Statistics 25.0 and GraphPad Prism 9.5.0.[Results]Among the three wavelength treatment groups,UV-B demonstrated the most significant effect on A.ovatus.Following 180 minutes of UV-B irradiation,the mortality rate of A.ovatus reached 100％across all developmental stages.Furthermore,the mortality rate was positively correlated with the irradiation time.Following short-term ultraviolet radiation,there was a significant increase or an increasing trend in the number of eggs laid(in addition to the daily number of eggs)and an increase in the expression level of the Vg gene(P＜0.05)The UV-C treatment group had a significantly higher reproductive capacity(51.15％)compared to the UV-A and UV-B treatment groups(P＜0.05).[Conclusion]All three ultraviolet wavelengths can inhibit the growth and development of A.ovatus.The mortality effect of UV-B was superior to UV-A and UV-C.Therefore,UV-B radiation lamps can serve as an effective method for mite control across various application scenarios.
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