Plutella xylostella is a major vegetable pest in the world. In this study, when a single colored sticky card trapped a small number of adults of diamondback moth in one week in one greenhouse, and the maximum number on single sheet did not exceed 100, the sticky card C6 showed a strong trapping effect, which was significant higher than other colored sticky cards. When a single colored sticky card trapped more adults of P. xylostella in one week in one greenhouse, and the maximum number of single sheet exceeded 100, the colored sticky cards C1-8, 11, and 13 all exhibited relatively strong trapping effects. In short, the adults of P. xylostella preferred bright colors, and the darker colored sticky cards had relatively poor trapping effects. For the prevention and control of pests, choosing the right colored sticky card will do more with less.

Three plastic greenhouses (length × width: 40 × 8m) were selected at Zhuanghang Agricultural Science and Technology Experimental Station, Shanghai Academy of Agricultural Sciences, Shanghai, China. Throughout the experiment, the doors at both ends of the greenhouse were open, which can guarantee that enough diamondback moth adults fly in. Cabbage seedlings were transplanted at the end of March. The water and fertilizer were routinely managed without using any pesticides. The trapping experiment began in May. In each greenhouse, 19 colored sticky cards were hung randomly, and the release paper on the other side was torn off. The bottom of the sticky card was about 10 cm away from the top of the cabbage. A diamondback moth pheromone lure was hung on each sticky card. Colored sticky cards and pheromone lures were renewed every week, and the adults of P. xylostella trapped by various colored sticky cards were surveyed once a week and recorded. The survey was continued for 7 weeks (W1-7). In order to verify the trapping effect of the colored sticky card without pheromone lure on the diamondback moth adults, they were supplemented in the 6th and 7th weeks of the investigation.