摘要
用饵木诱集及室内自然温度饲养方法确定了红脂大小蠹在陕西韩城雷寺庄林区成虫、卵、幼虫种群数量的年变动规律。研究表明,该虫卵、幼虫、预蛹、蛹的发育起点温度分别为18.36、16.53、12.00、8.03℃,有效积温分别为57.13、148.36、63.32、32.50日度;成虫羽化后需在12.90℃以上积累18.39日度的有效积温,完成继续发育后才能开始活动;越冬成虫开始出蛰活动的起点温度亦为12.90℃。对越冬虫态的出蛰活动期、各虫态的发生期和发生量的测报,可依据其发育历期、发生期的峰区范围、各虫态间的比率(种群的年龄组配)进行。
Population dynamics of Dendroctonus valens at the egg stage, larval stage and adult stage in Shaanxi province was studied by lure-wood and indoor breeding. The results showed that the developmental threshold temperature of eggs, larvae, prepupae, pupae were 18.36℃, 16.53℃, 12.00℃, 8.03℃ respectively,and the effective accumulated temperature were 57.13 day-degrees, 148.36 day-degrees, 63.32 day-degrees and 32.50 day-degrees respectively. After the imago emerged, 18.39 day-degrees(above12.9℃) were needed to develop subsequently and then move freely. The developmental threshold temperature of adult was 12.9℃. The end of hibernation, the occurring time and population of different developmental stage could be predicted based on the developing span, the range of ultimate outbreak time and population structure of D. valens.
出处
《西北林学院学报》
CSCD
北大核心
2005年第3期116-119,共4页
Journal of Northwest Forestry University
基金
陕西省林业厅项目(653131-142101)
国家黄土高原林木培育开放实验室基金(k02-03)
关键词
红脂大小蠹
种群动态
有效积温
预测预报
Dendroctonus valens
population dynamics
physiological time
prediction
