Temporal Pattern of Pinewood Nematode Exit from the Insect Vector Monochamus carolinensis.
Temporal Pattern of Pinewood Nematode Exit from the Insect Vector Monochamus carolinensis.
复制标题
松木线虫从昆虫媒介卡罗林松墨天牛中退出的时间模式。
作者：
M. Linit
以实验室饲养的松材线虫Monochamus carolinensis(Olivier)为材料，研究了松材线虫幼虫从该媒介中迁出的时间格局。通过比较成虫羽化后0、7、14或21天从其发育的原木中携带的达尔幼虫的平均数量来确定达尔幼虫的出苗率。甲虫羽化当天，达尔幼虫密度最高，以后各龄级呈缓慢下降趋势。线虫出线率第1周较低(4.5%)，第2周(20.5%)和第3周(13.1%)较高。在3周的观察期内，共有38.1%的初代达尔幼虫离开了甲虫。
Laboratory-reared Monochamus carolinensis (Olivier) were used to study the temporal pattern of pinewood nematode dauer larval exit from this beetle vector. Exit rates of dauer larvae were determined by comparing the mean number of dauer larvae carried by adult beetles 0, 7, 14, or 21 days after emergence from the log in which they developed. Density of dauer larvae was highest in beetles on the day of their emergence and dropped slowly through the subsequent age classes. The rate of nematode exit was low during the first week (4.5%) and higher during weeks 2 (20.5%) and 3 (13.1%). A total of 38.1% of the initial dauer larvae exited the beetles during the 3-week observation period.