摘要
本文报道了小地老虎蛾迁飞活动与气候因子及能源物质的相互关系。1985—1988年在云南白马雪山进行了三个全年的小地老虎蛾迁飞动态的系统观察,并测定比较了不同虫源的脂肪含量。结果表明,白马雪山一年有5次迁飞蛾峰。迁飞蛾种群动态与温度、湿度、降水、风速、气压和高空50000帕的西南及北风气流有密切关系。不同虫源的雌蛾脂肪含量差异显著,迁出型含量最高,本地型次之,迁飞过境型又次于前者,迁入型含量最低。
This paper deals with the migrations of the black cutworm moth (Agrotis ypsilon Rott.)and the energy source and climative factors. Observation stations were setting up on Baima snow mountain, Yunnan Province, and the throughout the year observed periodically the migratory population dynamics of the black cutworm moth, in 1985 to 1988.
1. We found that these are five mass immigratory on Baima snow moun-tain each year: The first in April; the second in May; the third mass immigratory from June to A.ugust; the fourth in September and October; the fifth in November.
2. The results of the observation of last serveral years showed that the dynamics of the immigratory population had close relation with temperature, humidity, rain, wind and atmospheric pressure. In natural condition, the immigratory density reached peak at 6.1 to 6.8C, air humidity at 72.1 to 78.3%, wind vilocity at 4.8 to 6.5 m/s. a day precipitation at 0.3 to 4.5 mm, and atmospheric pressure 639.5 to 648.6 hectopascal.
The results of the observation also showed that the various immigration peak periods of the black cutworm moth had closest correlation with the southwest and north wind of high altitude atmospheric pressure 500 hectopascal airflow court.
3. There are obvious differences in crude fat contents among adults the varions type of population sources. The content of the emigratory type is higher than the local type; the local type is higher than transitionary type; the transilionary type is higher than immigratory type; however, that of the immigratory type is the lowest one. The percentages are 33.4%, 33.2%, 24.2% and 22.0% respectively.
关键词
小地老虎蛾
迁飞
白马雪山
Bairn a snow mountain, Black cutworm moth, Migration
