Fuente: WIPO "tobacco agriculture" The utility model discloses a thrip observation device. The observation tube comprises a lower tube body, an observation seat, a glass observation sheet and a substrate, the observation seat is provided with a groove, the lower end of the lower tube body is detachably connected with the upper portion of the inner wall of the groove through a threaded structure, the lower tube body is made of transparent materials, the glass observation piece is horizontally arranged on the lower portion in the groove, the substrate is attached to the bottom of the glass observation piece, and the substrate ismade of dark light-transmitting paper. The thrips in the flowers can be conveniently shaken off and collected; in the observation process, the glass observation sheet plays a role in reflecting light,meanwhile, the black substrate enhances contrast to the thrips, observation is facilitated, the defect that due to the fact that the thrips are small in size, the thrips are not easily and directly observed by naked eyes in the field is overcome, the observation efficiency is effectively improved, the workload is reduced, and the observation and collection cost is reduced.