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林业科学 ›› 1997, Vol. 33 ›› Issue (2): 161-167.

• 论文及研究报告 • 上一篇    下一篇

枣林梨笠圆盾蚧生物学及发生规律的研究*

师光禄,刘贤谦,李捷,李连昌,杨富斗   

  1. 山西农业大学植保系 太谷 030801
  • 收稿日期:1996-01-18 出版日期:1997-03-25 发布日期:1997-03-25

STUDIES ON THE BIONOMICS OF QU ADRASPIDIOTUS PERNICIOSUS (COMSTOCK) AND ITS OCCURANCE PREDICTION

Guanglu Shi,Xianqian Liu,Jie Li,Lianchang Li,Fudou Yang   

  1. Shanxi Agricultural University, Taigu 030801
  • Received:1996-01-18 Online:1997-03-25 Published:1997-03-25

摘要:

梨笠圆盾蚧Quadraspidiotus perniciosus (Comstock)是枣林的重要微小害虫,在山西一年发生2代,以第2代的2龄若虫于1— 3年生的枝条上越冬,次年3月下旬开始活动,雌雄若虫均为两龄,第2代和第1代成虫分别于5月上旬和7月中旬开始羽化, 5月下旬和8月上旬分别产出第1代和第2代若虫。雌雄性比分别为1: 0. 26和1: 0. 35。本文也研究了寄主不同部位、不同方位与各代虫口密度、自然死亡率的变化规律;若虫在叶面的分布规律;寄主枝龄与寄生密度对种群的影响;各虫态发生的起迄日期;发育进度与温湿度的关系;发育所需天数。为测报成虫羽化盛期和产仔盛期提供了理论依据。

关键词: 梨笠圆盾蚧, 生物学, 发生规律, 预测预报

Abstract:

The scale insect Quadraspidiotus perniciosus (comstock) is one of the important pests of jujube. In Shanxi Province, this insect has two generations a year and overwinters as 2nd instar nymph of the 2nd generation on the branch. The overwintering nymphs begin to harm the host in late March the following year. The nymphs of male and female have two instars. The adults of the second and the first generations emerge in early May and in mid-July, respectively. The sex ratios of the two generations are 1: 0. 26 and 1: 0. 35, respectively. The ralationship between the population density and natural death rate and the different parts and directions of the host plant are also investigated. Besides, the distribution of the nymphs on the jujube leaf, the effect of the branch age and the density of the pest on the fluctuation of the population, the forecasting to the occurance of the nymphs and adults, and the temperature and moisture on the development of the pest, and the methods of control are also studied.

Key words: Quadraspidiotus perniciosus (Comstock), Biological characters, Regularity of outbreak, Forecast