Effects of heat shock, heat exposure pattern, and heat hardening on survival of the sycamore lace bug, Corythucha ciliata
Effects of heat shock, heat exposure pattern, and heat hardening on survival of the sycamore lace bug, Corythucha ciliata
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DOI：
10.1111/j.1570-7458.2011.01180.x
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发表时间：
2011-11-01
影响因子：
1.9
通讯作者：
Li, Bo
中科院分区：
文献类型：
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作者：
Ju, Rui-Ting;Chen, Gen-Bao;Li, Bo
西卡莫尔刺蝽Corythuchaciliata（Say）是悬铃木属外来入侵害虫。本研究对C. ciliata在实验室。详细的实验进行了高温（35，37，39，41，43，和45摄氏度），暴露时间（0.5，1，2，4，6，和8小时），和发育阶段（卵，若虫，和成人）对该错误的生存的影响。同时，还评估了热硬化对在致死温度下存活的影响（在转移到43摄氏度2小时之前暴露于33、35、37、39和41摄氏度1小时）。在35 - 39 ℃之间，卵、和成虫的存活率不受影响，但在温度>= 41 ℃时，随着暴露时间的增加（从0.5小时到8小时），存活率迅速下降。在0.5 ~ 8h范围内，各发育阶段致死50%的致死温度（Ltemp（50））随暴露时间的延长而降低。暴露0.5、2和8 h后，用于灭菌的Ltemp 50分别为44.3、42.0和39.0 ℃。卵的耐热性最高，其次是成虫，最后是蛹。成年雄性的耐热性略高于成年雌性。通过热硬化，雌性和雄性在43摄氏度下暴露2小时的存活能力显著增加，即，通过暴露于非致死性高温1 h;最佳热硬化温度为37 ℃。结果表明，C.热激温度下的纤毛水蚤对热激的耐受性取决于温度和暴露时间，并且热锻炼增强了纤毛水蚤对热激的耐受性。热胁迫下，C. ciliata可能部分解释了C.在我国南方各省悬铃木上迅速蔓延。
The sycamore lace bug, Corythucha ciliata (Say) (Hemiptera: Tingidae), is an invasive exotic pest on Platanus trees in China. This study assessed the thermotolerance of C. ciliata in the laboratory. Detailed experiments were conducted on the effects of high temperature (35, 37, 39, 41, 43, and 45 degrees C), duration of exposure (0.5, 1, 2, 4, 6, and 8 h), and developmental stage (egg, nymph, and adult) on survival of the bug. Meanwhile, the effects of heat hardening on survival at lethal temperature (exposure to 33, 35, 37, 39, and 41 degrees C for 1 h prior to transfer to 43 degrees C for 2 h) were also assessed for nymphs and adults. Survival of eggs, nymphs, and adults was not affected by temperatures between 35 and 39 degrees C, but declined rapidly with increasing duration of exposure (from 0.5 to 8 h) at temperatures >= 41 degrees C. The lethal temperature that caused mortality of 50% (Ltemp(50)) of all developmental stages decreased with increasing duration of exposure from 0.5 to 8 h. The Ltemp50 for nymphs was 44.3, 42.0, and 39.0 degrees C after 0.5, 2, and 8 h exposure, respectively. Thermotolerance was the highest in eggs, followed by adults and then nymphs. Thermotolerance was slightly greater for adult males than for adult females. The ability of nymphs, females, and males to survive exposure to 43 degrees C for 2 h significantly increased by heat hardening, i.e., by exposure to a non-lethal high temperature for 1 h; the optimal heat-hardening temperature was 37 degrees C. The results indicate that survival of C. ciliata at heat-shock temperatures depended on both the temperature and the duration of exposure, and the tolerance to heat shock was enhanced by heat hardening. The thermotolerance of C. ciliata may partially explain why C. ciliata has been rapidly spreading on Platanus trees in southern provinces of China.