龙眼角颊木虱发生规律与防治的研究

1998年调查了泉州农校旧校园内龙眼角颊木虱发生情况，并进行了几种农药防治龙眼角颊术虱若虫的室内和田间药效试驻。调查得知，该虫在泉州年发生4—5代．世代重叠，以二龄若虫和少数一龄若虫在被害叶的虫洞内越冬。若虫在龙眼树上的分布是外部叶片多于内部叶片；南面叶片多于西北面叶片；幼嫩、浓绿的叶片多于老、黄的叶片。若虫发生总是与新梢抽发期紧密相连，一年有两个高峰期，第一高峰期主要为害春梢和早发的夏梢，第二高峰期主要为害秋梢。药剂试验结果表明，几种新型农药对龙眼角颊术虱若虫均有较好药效，且药力持续时间长，尤以1％喜洋洋2000倍液和0．6％灭虫灵4000倍液的药效更佳。

Studies on occurrence and control of the longan psyllid Cornegenapsylla sinica Yang et Li

In the recent years,the longan psyllid Cornegenapsylla sinica Yang et Li has developed into a very important pest on the longan.The investigation showed that the longan psyllid developes 4-5 generations with the generations overlapping in Quanzhou of Fujian Province, China. In the early December, the 2nd instar nympha with a few 1st instar nympha overwinters in the nympha-holes of the damaged leaf. The distribution of the nympha is on the southeast side more than the northwest side of the longan tree, and on the deep green and young leaf more than the yellow and old leaf. The nympha always occurs together with the young shoot stages. There are two peaks of the nympha amount in a year. The nympha attacks the spring shoot and the early summer shoot in the 1st peak and the autum shoot in the 2nd peak.Some new pesticides in the test are very effective to the nympha . The general methods to control this pest are also covered in the paper.