## 4 Discussion  
In recent years, with respect to the construction of a more ecological civilization, the definition of pest control methods has switched from the simple use of chemical pesticides aimed at pest elimination to the deployment of ecological control, biological control, physical control, and other comprehensive means of environmentally friendly pest control [31]. Efficient and environmentally friendly traps and attractants play a very important role in the containment and eradication of insect pests. Techniques such as mating interference, mass capture, and trapping can be directly used to monitor and control insect population dynamics [32; 33]. The structure design of the trap should not only consider the flight path of the pests which is conducive to trapping, but also ensure the convenient production, transportation, and installation of the trap. The advantages of intercept traps are their relatively low cost and their easiness to deploy. For coleoptera insects, the commonly used traps mainly include multiple-funnel traps, cross-vane traps, baffle traps, boat traps, etc. The cross-vane panel trap was initially developed to monitor coleoptera in forests [19; 34], as a replacement for or supplement to the multiple-funnel trap [35]. Subsequent work with the cross-vane panel trap demonstrated its utility for trapping cerambycid and buprestid beetles [36; 37; 38]. The trapping efficacy for beetle species can be further enhanced, sometimes by more than tenfold, by coating trap surfaces with Teflon or other lubricants [23; 25; 26]. The results of our study showed that Teflon coating could significantly improve the trapping efficiency for _M. alternatus_. Moreover, beetle captures did not differ significantly when the Teflon solution was diluted by four or eight times. These results are similar to those of earlier studies, where Teflon-treated funnel traps with wet collection cups captured six times more longhorn beetles than the untreated funnel traps with wet collection cups [38]. The captures of the emerald ash borer, _Agrilus planipennis_ (Buprestidae), also increased substantially by coating trap surfaces with Teflon, even when highly diluted [39]. In addition, laboratory studies in insect husbandry have demonstrated that escapes from rearing containers can be reduced by treating container surfaces with Teflon, with this effect not being diminished by dilution [40]. Therefore, the use of a lower concentrated solution of Teflon, thereby reducing the amount to be used per trap, could substantially reduce programmatic costs. Teflon coating applied to the whole trap, and extended, ventilated collection cups resulted in a significant improvement in trap performance. Since a 4x dilution of Teflon coating applied to the black cross-vane traps led to a more-than-100% increase of _M. alternatus_ catches compared to the untreated standard trap designs, such a dilution (or even an 8x one) could be considered a good choice to treat the coating of traps in monitoring and controlling populations of this longhorn beetle. In the forest, we did not observe any significant difference in the trapping efficiency of _M. alternatus_ adults between newly coated traps and those exposed for one year, which is similar to the findings of [PERSON] et al. [23]. The influence of Teflon on trap efficiency may vary with product formulation and its source as well as with climatic conditions [30]. However, the trapping efficiency of Teflon coating began to decrease significantly after two years, where captures decreased by 36.6% compared to those of newly coated traps. One reason could be that the trap may easily accumulate dust, moss, and other sundries after being placed in the forest for a long time depending on the stand and its canopy density. This accumulation is likely to weaken the smoothness of the trap surface and its anti-adhesive design. Therefore, we suggest that _M. alternatus_ traps should be replaced by newly coated ones after two years. Certainly, it also depends on the costs and purpose of trapping _M. alternatus_.