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Effects of temperature and host age upon the encapsulation of Metaphycus stanleyi and Metaphycus helvolus eggs by brown soft scale Coccus hesperidum
Year:
1981
Source of publication :
Journal of Invertebrate Pathology
Authors :
Blumberg, Daniel
;
.
Volume :
37
Co-Authors:
Blumberg, D., Division of Biological Control, University of California, Riverside, CA 92521, United States
DeBach, P., Division of Biological Control, University of California, Riverside, CA 92521, United States
Facilitators :
From page:
73
To page:
79
(
Total pages:
7
)
Abstract:
Encapsulation of eggs inserted by Metaphycus stanleyi (Hymenoptera: Encyrtidae) into the brown soft scale Coccus hesperidum (Homoptera: Coccidae) became more frequent as the host matured. This occurred with both laboratory reared and field-collected parasites. After parasitism for 24 hr at 27°C, encapsulation frequency did not differ in hosts reared at 20° or at 27°C, but significantly increased in hosts reared at 33°C. When parasitism and rearing were carried out at the same temperature, the percentage of eggs encapsulated increased from 48.7% at 27°C to 94.1% at 33°C. With M. helvolus, the percentage of eggs encapsulated was considerably higher than with M. stanleyi; e.g., 99.3 vs 48.7%, respectively, at 27°C. At 20° and 27°C, some M. helvolus development occurred in the larvae of brown soft scale but none at 33°C; the adult stages of the host encapsulated all the parasite eggs at these temperatures. © 1981.
Note:
Related Files :
brown soft scale
Coccus hesperidum
Metaphycus helvolus
Metaphycus stanleyi
parasite egg encapsulation
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Related Content
More details
DOI :
10.1016/0022-2011(81)90057-4
Article number:
Affiliations:
Database:
Scopus
Publication Type:
article
;
.
Language:
English
Editors' remarks:
ID:
32632
Last updated date:
02/03/2022 17:27
Creation date:
17/04/2018 01:11
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Scientific Publication
Effects of temperature and host age upon the encapsulation of Metaphycus stanleyi and Metaphycus helvolus eggs by brown soft scale Coccus hesperidum
37
Blumberg, D., Division of Biological Control, University of California, Riverside, CA 92521, United States
DeBach, P., Division of Biological Control, University of California, Riverside, CA 92521, United States
Effects of temperature and host age upon the encapsulation of Metaphycus stanleyi and Metaphycus helvolus eggs by brown soft scale Coccus hesperidum
Encapsulation of eggs inserted by Metaphycus stanleyi (Hymenoptera: Encyrtidae) into the brown soft scale Coccus hesperidum (Homoptera: Coccidae) became more frequent as the host matured. This occurred with both laboratory reared and field-collected parasites. After parasitism for 24 hr at 27°C, encapsulation frequency did not differ in hosts reared at 20° or at 27°C, but significantly increased in hosts reared at 33°C. When parasitism and rearing were carried out at the same temperature, the percentage of eggs encapsulated increased from 48.7% at 27°C to 94.1% at 33°C. With M. helvolus, the percentage of eggs encapsulated was considerably higher than with M. stanleyi; e.g., 99.3 vs 48.7%, respectively, at 27°C. At 20° and 27°C, some M. helvolus development occurred in the larvae of brown soft scale but none at 33°C; the adult stages of the host encapsulated all the parasite eggs at these temperatures. © 1981.
Scientific Publication
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