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粘虫在中国西部越冬北界探讨
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引用本文:周靖华,高其琴,刘雪莹,李 引,孙 聪,姜 伟,仵均祥,李怡萍.粘虫在中国西部越冬北界探讨[J].西北农业学报,2021,30(6):921~928
DOI:10.7606/j.issn.1004-1389.2021.06.015
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作者单位
周靖华,高其琴,刘雪莹,李 引,孙 聪,姜 伟,仵均祥,李怡萍 (1.陕西省现代农业培训中心西安 7100032.旬阳市农业综合执法大队陕西旬阳 7257003.西北农林科技大学植保资源与病虫害治理教育部重点实验室陕西杨凌 7121004.西北农林科技大学农业部西北黄土高原作物有害生物综合治理重点实验室陕西杨凌 712100) 
基金项目:国家重点研发计划(2017YFD0201800);国家公益性行业(农业)科研专项(201403031);国家自然科学基金(31871971)。
中文摘要:粘虫每年会在越冬区和非越冬区进行季节性的往返迁飞,20世纪60年代将粘虫在中国东部地区的越冬北界确定为33°N,但其在西部地区越冬的相关信息一直未见报道。为确定粘虫在中国西部33°N能否越冬,于2015年至2018年在中国西部33°N附近的汉中、安康及杨凌3个地区设置观察点展开调查。每年11月将室内饲养的粘虫末龄幼虫放置在观察点进行笼罩试验,12月至翌年3月定期调查粘虫的存活率。结果表明:自12月至翌年3月,粘虫在3个地区的越冬存活率呈下降趋势。自2016年至2018年每年的3月份,汉中地区粘虫的最高存活率分别为:3.77%±0.80%,2.33%±0.60%,0.17%±0.17%;安康地区分别为: 4.00%±0.38%,1.83%±1.01%,1.83%±0.12%;杨凌地区分别为:0,0.15%±0.04%,0.63%±0.08%。并且在越冬结束时,汉中地区成功羽化的最高粘虫成虫数量分别为8头、9头、1头;安康地区分别为9头、8头、4头;杨凌地区分别为0头、1头、2头。初步认为:粘虫在中国西部33°N附近的陕西地区零星个体可以顺利越冬。同时首次探明粘虫在中国西部地区的越冬界限可能在33°N以北。
中文关键词:粘虫存活率  冬季气温  33°N  越冬界限
 
Discussion of Overwintering North Boundary of Mythimna separate(Walker) in Western China
Abstract:The Mythimna separate(Walker) migrates seasonally between overwintering and non-wintering areas every year.In the 1960s, the northern boundary of overwintering for Mythimna separate(Walker)in eastern China was 33°N, but no report was found the relevant information about its overwintering in the western region .To explore whether the Mythimna separate(Walker)can overwinter at 33°N in western China,an observation point was set up near 33°N in Hanzhong, Ankang and Yangling of western China from 2015 to 2018.The last in star larvae of Mythimna separate(Walker)reared in the laboratory were placed at the observation point in November each year, and the survival rate of Mythimna separate(Walker)was in vestigated regularly from December to March of the following year.The results showed that the overwintering survival rate of Mythimna separate(Walker)in the three areas decreased from December to March in the following year.From 2016 to 2018 in March each year, the highest survival rates of Mythimna separate(Walker) in Hanzhong area were 3.77%±0.80%, 2.33%±0.60%, 0.17%±0.17%; 4.00%±0.38%, 1.83%±1.01% in Ankang area, 1.50%±0.17%, and 0, 0.15%±0.04% and 0.63%±0.08% in Yangling area:At the end of overwintering, the highest numbers of adult Mythimna separate(Walker) that successfully emerged in Hanzhong area were 8, 9, 1; 9, 8, 4 in Ankang area; and 0, 1, 2 in Yangling area.Inconclusion, the sporadic individuals of Mythimna separate(Walker) can survive the winter at 33°N in the Shaanxi region of western China, at the same time, we found that 33°N is the boundary of overwintering of Mythimna separate(Walker) in western China for the first time.
keywords:Survival rate of Mythimna separate  Winter temperature  33°N  Boundary of overwintering
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