短时高温对莲草直胸跳甲成虫存活及繁殖的影响
Effect of short-term high temperature on survival and fecundity of Agasicles hygrophila
陈磊1, 2**,蔡笃程2,陈青1,唐超1,彭正强1***,金启安1,温海波
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DOI：
作者单位：1. 农业部热带农林有害生物入侵监测与控制重点开放实验室/中国热带农业科学院环境与植物保护研究所 儋州 571737; 2. 海南大学环境与植物保护学院 儋州571737
中文关键词：莲草直胸跳甲， 高温， 存活， 繁殖
英文关键词：Agasicles hygrophila， high temperature, survival, reproduce
中文摘要：
采用短时高温处理研究了40～47℃高温对莲草直胸跳甲Agasicles hygrophila Selma & Vogt成虫存活以及40～44℃对雌成虫繁殖的影响。结果表明：(1）处理1 h后，随着温度的上升，莲草直胸跳甲雌雄成虫的存活率均随着温度的上升而下降，44℃时，雌成虫的存活率开始显著高于雄成虫；处理温度为40℃时，雌雄成虫存活率也随着处理时间的延长而下降，7 h时，雌成虫的存活率开始显著高于雄成虫。此外，雌成虫致死90%的温度和时间分别高于雄成虫1.31℃和1.29 h，均表明雌成虫的耐热能力比雄成虫强，但差异仅在胁迫强度偏大时表现为显著；(2）40～44℃短时高温影响莲草直胸跳甲成虫的繁殖。与对照处理相比，40、42和44℃高温处理1h后，雌成虫的寿命和产卵量变化不显著，但均引起了其产卵前期的延长和10日龄成虫产卵停滞，44℃时，平均停滞时间达2.62 d，子代卵的孵化率则从40℃的88.67%下降到44℃的79.84%，44℃时显著低于对照。
英文摘要：The effects of short\|term high temperature on adult survival (40-47℃) and fecundity (40-44℃) of Agasicles hygrophila Selma &Vogt were investigated. The results showed that the survival rate of adults after treated 1 h decreased with increasing temperature. The female survival rate was significantly higher than that of males at 44℃ for 1 h. The survival rate of both females and males decreased with increasing treatment time at 40℃. After treated 7 h at 40℃, the female survival rate was significantly lower than that of males. The 90% lethal temperature and time of females were 1.31℃ and 1.29 h higher than those of males, respectively, which indicated that the heat tolerance of females was higher than males, however significantly only when the stress strength was higher. Treatment of 40, 42, and 44℃ for 1 h had no significant effect on longevity and fecundity of newly emerged females, but led to increasing pre\|oviposition duration and ceasing the oviposition behavior of 10-day old females, in which the ceasing period was 2.62 d in average at 44℃. The egg hatching rate decreased from 88.67% at 40℃ to 79.84% at 44℃, which was significantly lower than the control.