热胁迫与持续时间对小菜蛾成虫寿命与生殖的影响

Effects of short hot stress and its duration on longevity and fecundity of diamondback moth adults

模拟了热胁迫(日高温30、35℃)与持续时间(持续时间0、2、4 h)对小菜蛾(Plutella xylostella)寿命与生殖的影响。试验结果表明,小菜蛾经历不同温度热胁迫与持续时间处理后逐日产卵略有不同。高温30℃胁迫处理后,短时间热胁迫对小菜蛾成虫寿命、产卵日、总生殖量无显著影响。但是35℃下成虫第1天生殖量随持续时间延长而显著降低。结果还显示短时间热胁迫对成虫产卵的时间分布产生显著影响,且引起生殖补偿现象。

Effects of short hot stress stimulated（daily high temperature 30 ℃, 35 ℃ lasting for 0, 2, 4 hours） on longevity and fecundity of diamondback moth（DBM）, Plutella xylostella（L.） were studied in field. The results showed that there was a little impact of hot stress at different duration with different temperature on daily oviposition of DBM. Effects of hot stress at 30℃ for short duration on longevity, oviposition days and total fecundity were not significant, while quantity of eggs produced by the stressed adults reduced at 35℃ with duration increase on the first fecundity day. And there was a significant effect of hot stress with short duration on oviposition time distribution with reproduction compensation.