关键词: 灰茶尺蠖, 温度, 成虫, 产卵量, 寿命

Abstract: To clarify the changes in adult longevity and fecundity of Ectropis grisescens under different temperature conditions and elucidate the temperature⁃response mechanism of its reproductive traits，experiments were conducted in artificial climate chambers. Six temperature treatments（16，19，22，25，28 and 31℃）were set with relative humidity of 75% and a photoperiod of 14L∶10D. Parameters including pre⁃oviposition period，oviposition period，post⁃oviposition period，total fecundity per female，daily fecundity per female，and longevity of female and male adults were measured. The results showed that temperature exerted significant effects on female fecundity. The maximum total fecundity per female（512.50 eggs） was observed at 25 ℃，whereas the minimum value（243.22 eggs）occurred at 31℃. The highest average daily fecundity per female reached 62.81 eggs at 28 ℃，and the lowest was 20.41 eggs at
16 ℃. The curves of daily fecundity per female at different adult ages presented a bimodal distribution within 16—28 ℃，while only one oviposition peak was detected at 31 ℃. Significant differences were found in pre⁃oviposition，oviposition and post⁃oviposition periods across temperatures. The pre⁃oviposition period and oviposition period decreased from 3.42 d and 8. 46 d at 16 ℃ to 0.48 d and 3. 61 d at 31 ℃，respectively. The post⁃oviposition period was the longest（3.42 d） at 16 ℃ and the shortest（0.77 d） at 28 ℃. Longevity of both female and male adults decreased significantly with rising temperature from 16 ℃ to 31 ℃，decreased from 15.31 d and 12.15 d at 16 ℃ to 5.52 d and 3.83 d at 31 ℃. At each given temperature，female adults lived significantly longer than males. Survival analysis indicated that female and male adults at 16 ℃ had the longest median survival time with slow population decline. By contrast，the survival curve dropped sharply at 31 ℃，and female survival rate was consistently higher than that of males. In conclusion，adult longevity of E.grisescens shortened as temperature increased.The optimal reproductive temperature for female adults was 25—28 ℃. High temperature（31 ℃）restricted population growth by shortening the oviposition period，reducing fecundity and curbing adult longevity.These findings provide a theoretical basis for constructing oviposition models，forecasting population occurrence in Xinyang tea plantations，and developing green control technologies for E.grisescens.

Key words: Ectropis grisescens, Temperature, Adult, Fecundity, Longevity