English   español  
Please use this identifier to cite or link to this item: http://hdl.handle.net/10261/11136
logo share SHARE   Add this article to your Mendeley library MendeleyBASE
Visualizar otros formatos: MARC | Dublin Core | RDF | ORE | MODS | METS | DIDL
Exportar a otros formatos:

Life Table and Population Parameters of Nasonovia ribisnigri (Homoptera: Aphididae) at different Constant Temperatures

AuthorsDíaz Desani, Beatriz M. ; Fereres, Alberto
KeywordsNasonovia ribisnigri
Lettuce aphid
Population parameters
Issue Date3-Jun-2005
PublisherEntomological Society of America
CitationEnvironmental Entomology, Volume 34, Number 3, June 2005 , pp. 527-534(8)
AbstractAge-specific life tables of the lettuce aphid, Nasonovia ribisnigri (Mosley), feeding on lettuce were determined at different constant temperatures under controlled conditions. Our results showed that the proportion of alates increased with increasing temperatures, remaining below 7% at 16°C and increasing to 40–57% at a temperature above 20°C. The longest developmental time of apterous aphids was obtained at 8°C (31.5 d), and the shortest was at 26°C (6.2 d), whereas the developmental time of alates was always 0.7–1.1 d longer than for apterous. Most aphids needed four instars to reach adult stage, but at 8, 26, and 28°C, many individuals passed through five or six molts. Age-specific survivorship (lx) was always above 90% at the temperature range of 16–24°C. Mortality rate (qx) was rather low but constant at 8°C. However, mortality was high at 28°C and occurred mainly in the last nymphal instars and adult stage. Unexpectedly, no nymphs were produced by the adult morphs at 28°C, but effective fecundity was high at 8°C. Fecundity for alates was always lower than for the apterous aphids at the same temperature. The largest intrinsic rate of natural increase (rm), and the mean relative growth rate () occurred at 24°C, for both apterous and alate morphs, and the lowest at 8°C. Our results show that lettuce aphid is better adapted to survive and reproduce at low (8°C) than at high (28°C) temperatures, and its best performance occurred at 20–24°C.
Publisher version (URL)http://docserver.ingentaconnect.com/deliver/connect/esa/0046225x/v34n3/s3.pdf?expires=1235995665&id=0000&titleid=10265&checksum=2BBBB30AAC3100FEF68D015E239C796C
Appears in Collections:(ICA) Artículos
Files in This Item:
File Description SizeFormat 
s3.pdf441,16 kBAdobe PDFThumbnail
Show full item record
Review this work

WARNING: Items in Digital.CSIC are protected by copyright, with all rights reserved, unless otherwise indicated.