疆夜蛾发育起点温度和有效积温的研究

Study on the development zero temperature and dffective accumulated temperature of Peridroma saucia Hbner

在恒温条件下用新鲜烟叶饲养疆夜蛾 ,得到为害烟草的疆夜蛾各虫态的发育历期 ,用直线回归法求得疆夜蛾各虫态的发育起点温度和有效积温 ,根据所得数据和云南主要烟区的月平均温度推算得到玉溪、江川、澄江、宜良、石林、楚雄、富民、大理、保山 1年发生 2～ 3代 ,昆明、嵩明、晋宁、陆良、宣威、罗平 1年发生 2代 ,弥勒、宾川、永仁 1年 3代 ,昭通、丽江 1年 1～ 2代。

Peridroma saucia Hübner was fed with fresh leaves of tobacco at constant temperature. The developmetn duration of every stage of Peridroma saucia Hübner was obtained. The development zero and effective accumulated temperature were calculated by the linear regression method. The base data was provided for the forecast. There were 2～3 generations per year in Yuxi, Jiangchuan,Chengjiang,Yiliang,Shilin,Chuxiong,Fumin,Dali and Baoshan;2 generations in Kunming, Songming,Jinning, Luliang,Xuanwei and Luoping; 3 generations in Mile, Binchuan and Yongren;1～2 generations in Zhaotong and Lijiang. The results were based on the base data and average temperature of month in the main tobacco districts of Yunnan.