芽梢斑螟幼虫危害特点及其密度估计的研究

林业科学 ›› 1997, Vol. 33 ›› Issue (3): 247-251.

芽梢斑螟幼虫危害特点及其密度估计的研究

赵锦年¹,黄辉²

1. 中国林业科学研究院亚热带林业研究所富阳 311400
2. 浙江省淳安县姥山林场淳安 311700

收稿日期:1995-09-04 出版日期:1997-05-25 发布日期:1997-05-25

STUDIES ON THE INJURIOUS CHARACTERISTICS AND ITS DENSITY ESTIMATE OF THE LARVAE OF DIORYCTEIA YIAI

Jinnian Zhao¹,Hui Huang²

1. The Research Institute of Subtropical Forestry CAF. Fuyang 311400
2. Laosan Forest Farm, Chunan County, Zhejiang Province Chunan 311700

Received:1995-09-04 Online:1997-05-25 Published:1997-05-25

摘要/Abstract

摘要：

芽梢斑螟是马尾松二年生球果的重要害虫。根据种子园雄花发生特点,研究了芽梢斑螟越冬幼虫转移危害及其在树冠和林中的分布规律。结果表明, 7轮生枝的马尾松树冠上,芽梢斑螟越冬幼虫集中侵害第六、七轮生枝上的二年生球果,球果被害率达53.6%,幼虫数量占总数的58.8%。种子园内不同无性系有少雄(花)、中雄和多雄树之别,芽梢斑螟越冬幼虫转移后的危害率及其数量分布,随马尾松雄梢率的增加呈递增的趋势。危害率(y₁)和幼虫数量(y₂)与雄梢率(X)的回归方程式分别为y₁=0.660+0.473X, y₂=-0.829+0.303X。

关键词: 芽梢斑螟, 马尾松, 雄梢率, 危害率, 幼虫分布

Abstract:

Dioryctria yiai Mutura et Munroe is an important insect pest damaging 2-year-old cone of Pinus massoniana Lamb in China. The transfer damage of the overwintered larvae of the pest and its density estimate were studied on the basis of the reproductive charcteristics of the male flower of Pinus massoniana in seed orchard.The results showed that on the 7 whorls crown of host trees, the overwintered larvae distributed principally to 2-year-old cone of the 6th and 7th whorls, the rate of the cone damaged reached 53.6%, the percentage of the larvae reached 58.8% The larval damaged rate and the number of larvae increase with the increase of the inflorescence rate. The relationship between the darnaged rate of 2-year-old cone (y₁), number of larvae (y₂) and the male inflorescence rate (X) were estimated as y₁=0.660+0.473X, y₂=0.829+0.303X, respectively.

Key words: Dioryctria yiai Mutura et Munroe, Pinus massoniana Lamb., Male inflorescence rate, Damaged rate, Larval distribution

赵锦年,黄辉. 芽梢斑螟幼虫危害特点及其密度估计的研究[J]. 林业科学, 1997, 33(3): 247-251.

Jinnian Zhao,Hui Huang. STUDIES ON THE INJURIOUS CHARACTERISTICS AND ITS DENSITY ESTIMATE OF THE LARVAE OF DIORYCTEIA YIAI[J]. Scientia Silvae Sinicae, 1997, 33(3): 247-251.

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