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אסיף מאגר המחקר החקלאי
פותח על ידי קלירמאש פתרונות בע"מ -
Biological and ecological studies of the parasitoid Chelonus inanitus [Hym.: Braconidae] in Israel - IV. Oviposition, host preferences and sex ratio
Year:
1978
Source of publication :
Entomophaga
Authors :
רכב, יגאל
;
.
Volume :
23
Co-Authors:
Rechav, Y., Division of Entomology, Agricultural Research Organisation, The Volcani Center, Bet Dagan, Israel
Facilitators :
From page:
95
To page:
102
(
Total pages:
8
)
Abstract:
The oviposition rate of fertilized and unfertilized females of Chelonus inanitus (L.) was studied at different temperatures. The average number of eggs laid by fertilized females at 20°C was 612 and at 28°C, 1219. Unfertilized females laid an average of 689 eggs at 20°C and 1323 eggs at 28°C. C. inanitus can develop in various hosts such as:Anagasta kuehniella (Zeller), Cadra cautella (Walker) and Sitotroga cerealellaOlivier, but the females prefer to lay their eggs in those of their natural hosts, Spodoptera littoralis (Boisduval) and Spodoptera exigua (Hübner). The sex ratio of C. inanitus was affected by environmental conditions. Increase in the size of the egg host and decrease of daylength or temperature, increased significantly the number of females in the population. The ratio females/males at light-dark regimes of 14:10 was 0.66 and at L:D 12:12, 1.11. An increase of the temperature from 20°C to 25°C and 28°C decreased this ratio from 1.22 to 1.05 and 0.72 respectively. © 1978 Le François.
Note:
Related Files :
עוד תגיות
תוכן קשור
More details
DOI :
10.1007/BF02371997
Article number:
Affiliations:
Database:
סקופוס
Publication Type:
מאמר
;
.
Language:
אנגלית
Editors' remarks:
ID:
20946
Last updated date:
02/03/2022 17:27
Creation date:
16/04/2018 23:40
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Scientific Publication
Biological and ecological studies of the parasitoid Chelonus inanitus [Hym.: Braconidae] in Israel - IV. Oviposition, host preferences and sex ratio
23
Rechav, Y., Division of Entomology, Agricultural Research Organisation, The Volcani Center, Bet Dagan, Israel
Biological and ecological studies of the parasitoid Chelonus inanitus [Hym.: Braconidae] in Israel - IV. Oviposition, host preferences and sex ratio
The oviposition rate of fertilized and unfertilized females of Chelonus inanitus (L.) was studied at different temperatures. The average number of eggs laid by fertilized females at 20°C was 612 and at 28°C, 1219. Unfertilized females laid an average of 689 eggs at 20°C and 1323 eggs at 28°C. C. inanitus can develop in various hosts such as:Anagasta kuehniella (Zeller), Cadra cautella (Walker) and Sitotroga cerealellaOlivier, but the females prefer to lay their eggs in those of their natural hosts, Spodoptera littoralis (Boisduval) and Spodoptera exigua (Hübner). The sex ratio of C. inanitus was affected by environmental conditions. Increase in the size of the egg host and decrease of daylength or temperature, increased significantly the number of females in the population. The ratio females/males at light-dark regimes of 14:10 was 0.66 and at L:D 12:12, 1.11. An increase of the temperature from 20°C to 25°C and 28°C decreased this ratio from 1.22 to 1.05 and 0.72 respectively. © 1978 Le François.
Scientific Publication
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