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时间:2019-01-09
《棉铃虫发生与气温因子的关系研究》由会员上传分享,免费在线阅读,更多相关内容在学术论文-天天文库。
1、棉铃虫发生与气温因子的关系研究 摘要:采用连续10a的资料研究了棉铃虫(Helicoverpaarmigera)发生和气温的关系。结果表明,1、2和5月的平均气温与棉铃虫二代百株卵量呈正相关,6、7月的月平均气温与棉铃虫二代百株卵量呈负相关,7、8月的月平均气温与棉铃虫三代百株卵量的相关系数依次为-0.2953和0.4938。三代棉铃虫发生最适宜的月平均气温为25.8~26.7℃;8~9月的月平均气温与棉铃虫四代的相关系数依次为-0.3759和0.4798;10~12月的月平均气温与次年棉铃虫二代的相关系数依次为0.3533、-0.1518和-0.3010。6月中旬至7月中
2、旬的逐旬平均气温均与棉铃虫二代百株卵量呈负相关;7月上中旬的逐旬平均气温与棉铃虫三代百株卵量呈负相关,7月下旬至8月下旬的逐旬平均气温与棉铃虫三代百株卵量呈正相关。8月和9月上中旬逐旬平均气温与棉铃虫四代依次呈负相关和正相关。8月中旬日最高气温≥30℃的日数与棉铃虫四代百株卵量呈负相关,8月下旬至9月上中旬逐日≥30℃的日数与棉铃虫四代百株卵量呈正相关。10月下旬和11月中下旬逐日最低气温≤0.0℃的日数均与次年棉铃虫二代百株卵量呈正相关,初霜日与次年终霜日之间≤0.0℃的天数与次年棉铃虫二代百株卵量呈正相关。初霜日与次年终霜日的日数与次年棉铃虫二代百株卵量呈负相关。12月上
3、旬至次年2月中旬逐旬日最低气温≤-10.0℃的总日数与棉铃虫二代百株卵量呈负相关,其中2月中旬最低气温≤-10.0℃的日数与棉铃虫二代百株卵量呈负相关。建立了4个气温因子与棉铃虫相关达显著以上水平的回归方程。13 关键词:气温;棉铃虫(Helicoverpaarmigera);初、终霜日;相关 中图分类号:S433.4文献标识码:A文章编号:0439-8114(2016)08-1985-06 DOI:10.14088/j.cnki.issn0439-8114.2016.08.018 Abstract:Therelationshipsbetweenairtemperat
4、ureandbollworm(Helicoverpaarmigera)bycontinuoustenyearsdateswerestudied.TheresultsshowedthatmonthaveragetemperaturesofJanuary,FebruaryandMayand2thbollwormappearedpositivecorrelation,andnegtivecorrelationofJuneandJuly.CorrelationcoefficiensbetweenmonthaveragetemperatureofJulyandAugusttogethe
5、rwith3thbollwormwere-0.2953and0.4938successively.Thebesttemperaturescopewas25.8~26.7℃for3thbollworm.CorrelationcoefficiensofAugustandSeptemberwere0.3759and0.4798inproperoderbetweenmonthaveragetemperaturesand4thbollworm.CorrelationcoefficiensofOctobertoDecemberwere0.3533,-0.1518and-0.3010suc
6、cessivelybetweenmonthaveragetemperaturesand2thbollwormofcomingyear.CorrelationcoefficiensappearednegativecorrelationsbetweenaveragetemperatureofthesecondtendaysofJunetoJulysecondtendaysand2thbollwormtendaysbytendaysly.Correlationcoefficiens13appearednegativecorrelationbetweenaveragetemperat
7、uretendaysbytendaysofthefirstandsecondtendaysinJulyand3thbollworm.CorrelationcoefficiensappearaedpositivecorrelationbetweenaveragetemperatureofthirdtendaysJulytoAugustand3thbollworm.Correlationcoefficiensappearedpositivecorrelationandnegativecorrelations
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