摘要
光滑足距小蠹[Xylosandrus germanus（Blandford）]雌成虫具有明显的趋光性,光照强度为1~400 lx时,趋光性随光照强度提高而增强。25℃时,完全黑暗条件下该小蠹雌成虫不起飞,光照强度为1~1 500 lx时,起飞虫量随光照强度的增加而增加,且起飞虫量在光照强度为1 500 lx时达最大,光照强度超过1 500 lx时,起飞虫量又逐渐减少。在光照强度400 lx、温度21℃时雌成虫开始起飞,温度21~30℃,起飞虫量随温度升而增加,温度为25~27℃时起飞虫量较多,温度升至35℃时,小蠹雌成虫停止飞行。研究表明,光照和温度两个因素中,温度是光滑足距小蠹雌成虫起飞的先决条件,只有当环境温度高于起飞的临界温度（21℃）时,在低光照强度下雌成虫才起飞。
Take-off activity of the female adults of Xylosandrus germanus,the ambrosia beetle,was studied in lab.A relative remarkable phototaxis of the beetle was proved.In the region of light intensity between 1～400 lx,the phototaxis of the beetle increased with light intensity.At temperature of 25 ℃,no beetle took off in the dark,the rate of take-off of the female adults was increased with light intensity in the region of light intensity between 1～1 500 lx and 1 500 lx for maximum flight.At light intensity of 400 lx,the rate of take-off of the beetle increased with temperature in the region of temperature 21～30 ℃,21 ℃ was minimum for flight and 25～27 ℃ for maximum flight,while flight activity ceased at temperatures over 35 ℃.These results showed that the female adults preferred low light intensity for flight,the threshold temperature necessary for flight was 21 ℃,and temperature was prerequisite for flight initiation.
出处
《安徽农业科学》
CAS
北大核心
2007年第30期9599-9600,共2页
Journal of Anhui Agricultural Sciences
基金
四川省科技厅应用基础项目(2006J13-040)
关键词
光滑足距小蠹
起飞
光照强度
温度
趋光性
Xylosandrus germanus
Take-off
Light intensity
Temperature
Phototaxis
