摘要
1996—1999年,在浙江东南沿海自然变温下研究了柑桔矢尖蚧的生活史、分布习性、死亡率、产卵量、性比和消长规律。结果表明,卵期和雄成虫寿命很短,雌成虫寿命长,完成1代的历期分别为(70.1±3.9),(67.5±9.8),(211.4±16.5)d。初孵若虫从孵化至固定的活动时间雌性长,雄性短。自然死亡率露地区高于避雨区,主要致死因子是失踪和自然死亡,其次是寄生。每头雌成虫产卵量第1,2,3代分别为(93.0±42.7),(134.2±65.6),(196.3±81.9)粒。第1,2,3代雌雄性比平均值分别为1∶2.85,1∶1.45和1∶3.28。每年发生2～3代。初孵若虫第1代呈双峰型,第2代的峰比第1代的峰高,比第3代的峰低。
Life history, distribution habit, mortality, oviposition number, sex ratio and fluctuation of population of citrus arrowhead scales Unaspis yanonensis(Kuwana) were studied under natural climate in the coastal region of Southeastern Zhejiang in 1996-1999.The results of this study shown that the stages of the eggs and male adults were very short, female adult stage was long.The durations of the eggs , male adults, and female adult were (70.1±3.9), (67.5±9.8), (211.4±16.5) d, respectively. The time from hatch of eggs to immobile walking for female nymphs was longer than that for male nymphs.The natural mortality of the scales under the open fields was higher than that under the shelter fields.The primary factors to cause death were disappearance and natural death and the secondary factor was parasitization.The oviposition numbers per female for the first, second, and third generation were 93.0±42.7,134.2±65.6, and 196.3±81.9, separately.The average ratioes of female to male for the first,second, and third generation were 1∶2.85, 1∶1.45,and 1∶3.28, respectively.The scales taked place 2-3 generations every year. The newly hatched nymphs of the first generation had two occurrence peaks. The peak of second generation was higher than that of the first generation and the peak of the third generation was lower.
出处
《浙江农业学报》
CSCD
2003年第2期78-82,共5页
Acta Agriculturae Zhejiangensis
基金
浙江省"九五"重点项目(961102241)
台州市科技局1996-1998年资助项目(96210)。
关键词
柑桔矢尖蚧
生物学特性
发生规律
生活史
分布
死亡率
产卵量
性比
Unaspis yanonensis
life history
distribution habit
mortality
oviposition number
sex ratio
fluctuation of population
