Abstract:The damage caused by Cryptophlebia ombrodelta (Lower) (Lepidoptera:Tortricidae) on the shoots Erythrophleum fordii, a precious species in south China, is the main restraint on this plant's plantation promotion and healthy development. The comprehensive influence of temperature on the development and reproduction of C. ombrodelta were investigated using a series of temperature tests, which were based on the temperature range of E. fordii in a natural distribution and potential extension area. The results showed that the effect of temperature on the developmental stages of C. ombrodelta were significant within the temperature range. The developmental stages decreased significantly with an increase in temperature; generation duration was 66.87 d at 18℃ and decreased to 35.77 d at 30℃. The survival rate of eggs, larvae, and adult generation and fecundity first significantly increased then decreased with an increase in temperature; the effects of temperature on pre-pupae and pupae were not significant, and fecundity, rather than survival rates, was more sensitive to temperature. The survival rates and fecundity, at 41.20% and 13.90 eggs, respectively, were the lowest at 18℃, and the survival rates and fecundity, at 83.80% and 45.40 eggs, respectively, reached the maximum at 27℃; this was the most appropriate developmental temperature for C. ombrodelta, since the survival rates and fecundity decreased to 66.00% and 32.43 eggs, respectively, at 30℃, but the survival rates and fecundity were higher at 18℃; therefore, the survival rate and fecundity were more sensitive to low temperatures than to high temperatures. The developmental temperature threshold and the effective accumulated temperature were 5.77℃ and 876.76 d℃, respectively. The effective accumulated temperature of larvae was the highest among the developmental stages, and the proportion of the larval stage accounted for 45.23% of the whole generation. The developmental rates were positively correlated with temperature; eggs and pupae had the fastest developmental rates, followed by pupae and adults, and that of the larvae was the slowest. The stages with faster developmental rates were more sensitive to temperature. It can be deduced that when the larval duration of C. ombrodelta was longer, the generation time per year was less, and the survival rate and fecundity were lower. Therefore, the damage to the bored parts of the host plant, E. fordii, is more serious in low temperature regions. When the larval stage of C. ombrodelta was relatively shorter, the generation time per year was higher, and survival rate and fecundity were higher in high temperature regions; therefore, the degree of damage to the bored parts of host plant, E. fordii, is lower in every generation than which in low temperature regions, but the occurrence of damage is more frequent. These results provide a reference for the prevention and control of C. ombrodelta in different temperature regions, which could help guide the reasonable extension and healthy development of E. fordii plantations.