橄榄星室木虱的生活史和种群消长动态的研究

Life history and population dynamics of Pseudophacopteron canarium Yang & Li

本文研究了莆田市延寿村的橄榄星室木虱的生活史和种群消长动态。结果表明 ,橄榄星室木虱在莆田地区一年发生 8代 ,世代重叠。卵、若虫 (1- 5龄 )、成虫在 1年中有 6个发生高峰期 ,以秋梢期为全年雌成虫产卵、若虫发生最高峰 ,夏梢期是成虫羽化全年最高峰。其田间种群数量消长与橄榄抽梢期有着极为密切的关系 ,每一次抽梢期都带来一个产卵高峰期和低龄若虫发生高峰期 ,每一次抽梢都使虫口数量急剧上升 ,并出现高峰 ,其间也带来一个很高的种群增长率 ,待到新梢定型老化 (枝梢生长后期 )又使种群数量明显下降 ,而低龄若虫的发生和高峰期的出现 ,一般比产卵滞后 5 - 10d。

The life history and population dynamics of Pseudophacopteron canarium Yang & Li were investigated in Yanshou village, Putian, Fujian, China. The results showed that this psylla had 8 generations per year, with generation overlapping. There were six significant peaks in the occurrences of its eggs, nymphs (1st-5th instar) and adults per year. The occurrences of egg and nymph reached the highest peak at the autumn shoot stage, whereas the adult emergence reached its highest peak at the summer shoot stage. The psylla population fluctuation had a close relation with the shoot occurrence of Canarium album . At each shoot stage, there were a peak of egg laying and a peak of nymph occurrence, and a significant high population growth rate was also observed. After the new shoot took shape, the population distinctly dropped to a low level, and with the occurrence and the peak of young nymphs 5-10 days later as compared with egg laying.