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气候变暖对油松毛虫幼虫越冬及上下树发生期的影响
何善勇1,骆有庆1,温俊宝1,赵宇翔2,宗世祥1**
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DOI:
作者单位:1北京林业大学省部共建森林培育与保护教育部重点实验室北京100083;2 国家林业局森林病虫害防治总站沈阳110034
中文关键词:
英文关键词:
中文摘要:      温度影响害虫生发育重要的之一,为了解气温的变化趋势以及在此背下油松毛Dendrolimus tabulaeformis Tsai et Liu幼虫越冬及上下树的动态变本文根据辽宁省建平县19882009期间油松毛上下树发生期资料气象资料,分建平县气温年变化趋势油松毛上下树发生年变化趋势了发生气温之间相关性结果表明:22年(19882009)建平县气侯趋势显著线性倾向估计均气温、年均最低气温和年均最高气温均呈现出上升趋势气候倾向率别达0. 500. 590. 36 /10年,四季春季气温升幅最大夏秋季次之冬季最低在此气候下油松毛虫幼虫上下及越冬发生着一定的变化趋势中:总体呈现出提前发生、提前结历期缩短的变化趋势 ;年幼虫期则呈现出延迟发生、提前结历期缩短的变化趋势 ;越冬期长度则呈现出延长的变化趋势相关性析认气候对油松毛虫的具有直接影响,主要表现期随气候而显著提前在不考虑其它因素的影响下910月均气温上升1则下期会提前约2d幼虫越冬及上树发生期表现并不受气候直接影响。研究结果有效控制油松毛提供了理论依据
英文摘要:
         Temperature is one of the most important factors affecting a pest’s growth and development. We looked for a correlation between temperature change trends in Jianping county of Liaoning Province and the periods of occurrence of three behaviours of the larva of Dendrolimus tabulaeformis Tsai et Liu; climbing up the host tree,descending the host treeand overwintering. We compared recent temperature trends based on climate data from 1988—2009 with changes in timing of the selected behaviours of the larva ofD. tabulaeformis based on observations recorded over the sameperiod. The climate record indicates a significant warming trend in Jianping county of Liaoning Province during the 22 years from 1988 to 2009. Assuming a linear trend for temperature change we show that annual mean temperature,annual mean maximum temperature and annual mean minimum temperature all exhibit escalating trends,estimated at 0. 50 /10 years,0.59℃ / 10 years and 0. 36 /10 years,respectively. Seasonally,spring shows the highest escalation in temperature,summer andautumn show medium escalation and winter the lowest. Under climate warming,the periods of occurrence of climbing upand down the host tree and overwintering displayed changing trends. The behaviour of descending the host tree tends tobegin and end earlier and the duration of this behaviour decreases. The occurrence of climbing up the host tree tends to begin later and end earlier so that the duration of this behaviourdecreases. The duration of overwintering tends to
increase. Analysis shows that climate warming has a direct influence on the occurrence of climbing down behaviour,withthe cessation of this behaviour tending to advance significantly with temperature escalation. Excluding other factors,the end of the climbing down period would advance 2 days with 1 of temperatureincreased However,the periods ofoverwintering and climbing up the host tree appear not to be directly correlated with climate warming. This research couldprovide a theoretical basis for practical control of this pest.
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