温度锻炼对西花蓟马温度耐受性及繁殖的影响
Impact of temperature hardening on thermal tolerance and reproduction in Frankliniella occidentalis
李鸿波,史亮,王建军,杜予州**
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DOI：
作者单位：扬州大学应用昆虫研究所扬州225009
中文关键词：西花蓟马, 温度锻炼, 耐受性, 繁殖
英文关键词： Frankliniella occidentalis, temperature hardening, reproduction
中文摘要： 西花蓟马Frankliniella occidentalis（Pergande）是危害蔬菜和观赏植物的一种重要害虫，其种群数量随季节的变化而波动。温度被认为是影响种群动态的重要因子。为探究不利温度对对西花蓟马的影响，本研究将3日龄成虫置于18或 31℃下分别锻炼1,2，3 d后，检测了其温度耐受性和繁殖力。结果表明，在18℃下的持续锻炼明显提高了西花蓟马的耐寒性与耐热性，这证实了高低温胁迫间存在交互抗性；虽然经31℃的锻炼明显提高了其耐热性，但耐寒性未得到相应的增强。经18℃锻炼后，西花蓟马的繁殖力显著下降，31℃锻炼对其繁殖力没有明显影响。本研究结果表明温度的交互抗性可能有利于昆虫在自然界的存活，但这种获得的耐受性是以繁殖力的降低为代价的。
英文摘要：The western flower thrip, Frankliniella occidentalis （Pergande）, is an important insect pest of vegetables and ornamentals.Populations of this pest display marked seasonal fluctuations in which temperature is considered the most important factor.In order to explore the effect of temperature on F.occidentalis, threeday adults were exposed to 18 or 31℃ for 1, 2 and 3 d, after which their temperature tolerance and reproduction was investigated.The results suggest that continual exposure to 18℃ markedly improved cold and heat tolerance.Cross tolerance in response to cold and heat stress was observed.However, although exposure to 32℃ obviously increased adult heat tolerance, cold tolerance was not improved accordingly.Reproduction obviously declined after exposure to 18℃ but was unaffected by exposure to 31℃.Our results confirm that temperature tolerance is achieved at the cost of decreased reproduction.