Abstract
Comparative experiments on trapping major rice pests using different methods showed that a light-transmitting three-combination trapping method, using different combinations of color plates + insect sex pheromones + transmitting (shielding) light covers + solar-powered automatic insect-attracting ultraviolet lamps, demonstrated significant positive attraction and synergistic effects on the simultaneous capture of multiple pests, including rice Sogatella furcifera, Laodelphax striatellus, Chilo suppressalis, and Sesamia inferens and rice leafhoppers, Sitobion miscanthi, Cnaphalocrocis exigua, Parnara guttata, and Naranga aenescens. In addition, the light-transmitting three-combination trapping method has a low benefit-harm ratio and is not easily disturbed by non-target flies (Muscadomestica). The ultraviolet light and transmitting cover in the device had a negative effect on attracting the Cnaphalocrocis medinalis, resulting in a highly significant or significant decrease in its capture rate. The results also showed that the light-shielding double-combination trapping method, which lacks ultraviolet lamp waves and transmitting covers, had no significant difference in the capture rate and insect benefit-harm ratio of C. medinalis adults compared with the glue-type sex lure method, confirming that C. medinalis has a significant negative tendency characteristic to ultraviolet lamp waves and transmitting covers. Therefore, the light-shielding double-combination trapping method using color plates and insect sex pheromones is recommended for monitoring the weakly phototactic C. medinalis. The light-transmitting three-combination trapping method is preferred for the simultaneous capture of multiple major rice pests besides C. medinalis. This study provides a scientific basis for the rational and effective application of multi-source physical and chemical trapping for monitoring and pest control of major crop pests.