Abstract: Studying on the selective preferences of Apolygus lucorum and Adelphocoris suturalis (Hemiptera: Miridae) to cotton plants with different resistance levels and damaging treatments could help us establish a theoretical basis for IPM of cotton bugs. In this study, we used plants of the resistant variety BR-S-10 and the susceptible variety Kelin 08-15 and the plants of these two cotton varieties damaged by A. lucorum and A.suturalis bugs respectively as tested materials, and fresh air as the blank control, and a total of fifteen pair combinations of source odor were formed to investigate the taxis responses of A. lucorum and A. suturalis to cotton plants with different resistance levels and damaging treatments with Y-shaped olfactometer in the laboratory. The results indicated that the selective preferences of A. lucorum were in the order of the susceptible variety, the susceptible variety damaged by A. suturalis and the susceptible variety damaged by A. lucorum, sequentially. However, A. suturalis preferred to the susceptible variety damaged by A. lucorum, the susceptible variety damaged by A. suturalis and the susceptible variety observably. In general, two mirid species tended to significantly choose the susceptible cotton varieties, and showed an aversion to the resistant cotton plants. A. lucorum tended to choose the susceptible variety damaged by A. suturalis and the susceptible variety damaged by A. lucorum, while A. suturalis preferred to the susceptible variety damaged by A. lucorum and the susceptible variety damaged by A. suturalis.  

Key words: Apolygus lucorum, Adelphocoris suturalis, cotton；insect resistance, selective preferences