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›› 1988, Vol. 24 ›› Issue (2): 177-184.

• 论文及研究报告 • 上一篇    下一篇

马尾松毛虫三代分化率与气候因子相关性的研究

陈镈尧 查光济 王安实   

  1. 安徽农学院;东至县金寺山林场;寿县林业局
  • 收稿日期:1987-06-23 修回日期:1900-01-01 出版日期:1988-05-25 发布日期:1988-05-25

A STUDY ON THE CORRELATION BETWEEN DIFFERENTIATION RATIONS OF THE THIRD GENERATION OF THE MASSON'S PINE CATERPILLAR AND METEROLOGICAL FACTORS

Chen Boyao,Zha Guangji,Wang Anshi   

  1. Agricultural College of Anhui;Jinshishan Forest Farm,Dongzhi County;Forestry Survice,Shouxian County
  • Received:1987-06-23 Revised:1900-01-01 Online:1988-05-25 Published:1988-05-25

摘要: 在马尾松毛虫二、三代发生区,6年以上有一次高三代分化率,形成初秋虫灾大暴发,致使成片松林死亡。与高三代分化相关显著的气象因子是:8月份平均气温,稳定通过10℃的始日和全年大于10℃的日照时数。而打破松毛虫滞育的关键因子是8月中、下旬4龄幼虫长日照的刺激,使分化三代虫数大量增加,通过林场22年的三代分化率调查数据和7个气象因子的电算,预测出松毛虫三代分化率的数学模型:Yi=∑Mj-1ik-1cjkδi(jk)用时间序列法预测1986、1987年三代分化率与实地调查数字比较接近。

Abstract: A high differentiation ratio occurs once above 6 years of the 3rd generation of the Masson's pine caterpillar,Dendrolimus Punctatus,in the infested areas.It causes on early Autumn outbreak of caterpillar populations and killed large area of pine stands.Meteorological factors correlated significantly to high ratios are mean temperatures of August,the initial day stably over 10℃,and hours of sunshine above 10℃ through the year.Key factor to break the diapause of the caterpillar is the stimulus to the 4th instar of the long sunshine of mid to late August,which makes the differentiation increase substantially.Based on the computation of the data of the investigations for 22 years in Jinshishan Forest Farm and 7 meteorological factors,a mathematic model for prediction of the ratios of the 3rd generation was worked out as the following:Yi=∑Mj-1ik-1cjkδi(jk) By time series method,the differentiation ratios for 1986 and 1987 are close to that investigated on site.