Please use this identifier to cite or link to this item: http://hdl.handle.net/11455/68783
標題: Relationships between egg mass size and egg number per egg mass in the casuarina moth, Lymantria xylina (Lepidoptera : Lymantriidae)
作者: Shen, T.C.
Shae, Y.S.
Liu, C.S.
Tan, C.W.
Hwang, S.Y.
關鍵字: Lymantria xylina;egg mass size;egg number;gypsy-moth;fecundity;pupation;dispar;caterpillars;performance;populations;infection;density;diet
Project: Environmental Entomology
期刊/報告no:: Environmental Entomology, Volume 32, Issue 4, Page(s) 752-755.
摘要: 
The casuarina moth, Lymantria xylina Swinhoe, is a serious defoliator of hardwood and fruit trees in Taiwan. Currently, overwintering egg mass density is the primary criterion used to monitor the population size of the casuarina moth. We assessed the relationship between casuarina moth egg mass size and the number of eggs per egg mass from two heavily infested sites in central Taiwan. Size parameters (length, width, area, and weight) were measured for each egg mass, and the egg number,in each egg mass was counted. Results indicated substantial geographic variation in egg mass size. Regression analyses revealed a positive relationship between mass size (length, width, area, and weight) and the number of eggs per mass, and that weight explains approximate to98% of the variation in the number of eggs per egg mass. The use of weight and other egg mass density measurements may provide forest and orchard managers with increased accuracy in estimating casuarina moth population size.
URI: http://hdl.handle.net/11455/68783
ISSN: 0046-225X
Appears in Collections:期刊論文

Show full item record
 

Google ScholarTM

Check


Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.