Nysius species are one of the emerging pests of perilla crop in Korea. Seed weight loss and germination of perilla seeds caused by Nysius plebeius were studied by exposing perilla seeds cv. Deulsaem to six insect infestation levels (0, 5, 10, 15, 20, and 25 individual) for 3 and 5 days in the laboratory. The seed weight loss and germination rate were significantly affected by infestation levels and feeding durations. The feeding impacts on seeds increased with increasing in bug density and duration. The higher seed weight loss, and weak germination were recorded at higher bug density (25 individuals) for longer (5 days) feeding duration. The triphenyl tetrazolium chloride, TTC, showed lower seed viability for damaged seeds than undamaged seeds. The outcomes of the study are discussed in terms of impacts of perilla seed bugs infestation, and suggest longer field exposure of perilla seeds to seed bugs may bring lower yield with poor quality of seeds and low germination potential of seeds. Future studies should examine the changes in nutrient contents of seeds after exposed to perilla seed bugs.

Nysius物种是韩国紫苏作物中新兴的害虫之一。Nysius plebeius引起的紫苏种子失重和发芽通过暴露紫苏种子的简历进行了研究。在实验室中连续3天和5天，使Deulsaem达到六种昆虫侵扰级别（分别为0、5、10、15、20和25）。种子的失重和发芽率受侵染水平和进食时间的影响很大。饲喂对种子的影响随虫害密度和持续时间的增加而增加。在较高的臭虫密度（25个个体）下，记录了较高的种子失重和较弱的发芽时间（5天），饲喂时间较长（5天）。氯化三苯四唑氯化物（TTC）对受损种子的种子活力比未受损种子低。该研究的结果根据紫苏种子虫侵扰的影响进行了讨论，表明紫苏种子在田间暴露于种子虫的时间越长，可能导致产量降低，种子质量差和种子发芽潜力低。