Abstract: Based on resistance selection, the life tables of abamectin-resistant (AbR), fenpropathrin-resistant (FeR), and susceptible (S) strains of Tetranychus cinnabarinus at 15 ℃, 20 ℃, 25 ℃, 28 ℃, 31 ℃, 34 ℃, and 36 ℃ were constructed, and the development duration, fertility, and intrinsic rate of increase (r_m) of the strains were compared, aimed to understand the relative fitness of T. cinnabarinus resistant strains at different temperatures. The results indicated that compared with S strain, AbR and FeR strains had longer development duration at 15 ℃ but lower fertility at 20 ℃-28 ℃, and their relative fitness (represented by r_m) was smaller at 15 ℃ but similar at 20 ℃-31 ℃. For AbR and FeR strains, the fitness cost was moderate at 15℃ but lower at 20 ℃-31 ℃. However, at high temperatures (≥34 ℃), FeR strain possessed remarkable fitness cost while AbR strain showed better fitness.

Key words: peach, paraquat, vegetative growth, photosynthesis, glyphosate, root structure