Seasonal abundances of the mamane moth, its nuclear polyhedrosis virus, and its parasites
Files
Date
1975-05
Authors
Contributor
Advisor
Department
Instructor
Depositor
Speaker
Researcher
Consultant
Interviewer
Narrator
Transcriber
Annotator
Journal Title
Journal ISSN
Volume Title
Publisher
Island Ecosystems IRP, U.S. International Biological Program
Volume
Number/Issue
Starting Page
Ending Page
Alternative Title
Abstract
The mamane moth (Uresephita polygonalis, Denis and Schiff.) is a serious pest of the mamane tree (Sophora chrysophylla, Salish.) on the island of Hawaii. The larvae of this moth feed on mamane leaflets sometimes causing serious defoliation. The life cycle and development of U. polygonalis were determined by observation of laboratory reared animals. Results of laboratory tests indicated that Acacia koa was not a host of the larvae. Seasonal abundance of the moth was estimated from monthly counts of eggs and larvae collected from four sampling sites. Apparently there are no positive correlations of population dynamics with rainfall, humidity, temperature and vegetative flushing of mamane. Four parasites were reared from U. polygonalis collected at the sampling site. Only one of these, an ichneumonid (Rorogenes blackburni, Cameron) appeared to be an important parasite, although it did not occur in high enough numbers to seriously affect mamane moth populations. The nuclear polyhedrosis virus, present only at sampling site 4, was a major factor in the regulation of the U. polygonalis population at that site. Laboratory tests indicated that larvae from all sites were highly susceptible to the virus. However, why the virus did not occur at all sites remains to be determined. Possibly the amount of sunlight and ultraviolet radiation reaching the trees and ground beneath them affects the virus which is inactivated by light. Thus, in years when U. polygonalis populations do not reach high levels, the virus is confined to cloud covered areas such as site 4. The virus disease plays a major role in population regulation when it reaches epizootic levels.
Description
Reports were scanned in black and white at a resolution of 600 dots per inch and were converted to text using Adobe Paper Capture Plug-in.
Keywords
mamane moth, Uresephita polygonalis, Sophora chrysophylla, Horogenes blackburni, Moths -- Hawaii., Insect pests -- Biological control -- Hawaii.
Citation
Conant M. 1975. Seasonal abundances of the mamane moth, its nuclear polyhedrosis virus, and its parasites. Honolulu (HI): Island Ecosystems IRP, U.S. International Biological Program. International Biological Program Technical Report, 64. 34 pages.
Extent
34 pages
Format
Geographic Location
Time Period
Related To
Related To (URI)
Table of Contents
Rights
CC0 1.0 Universal
Rights Holder
Local Contexts
Email libraryada-l@lists.hawaii.edu if you need this content in ADA-compliant format.