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Survival of Bemisia tabaci adults under different climatic conditions
Year:
1996
Authors :
Lehmann-Sigura, Nina
;
.
Volume :
80
Co-Authors:
Berlinger, M.J., Entomology Laboratory, ARO, Gilat Regional Experiment Station, Mobile Post Negev 85-280, Israel
Lehmann-Sigura, N., Entomology Laboratory, ARO, Gilat Regional Experiment Station, Mobile Post Negev 85-280, Israel
Taylor, R.A.J., Entomology Department, Ohio Agricultural Research and Development Center, Wooster, OH 44 691, United States
Facilitators :
From page:
511
To page:
519
(
Total pages:
9
)
Abstract:
The ability of the sweet potato whitefly, Bemisia tabaci Gennad., to survive a range of environmental conditions was investigated in the laboratory. The range of temperature and humidity investigated corresponds to the normal climatic range during B. tabaci's summer migration in Israel. Adult whiteflies confined to small test cages were exposed to combinations of temperature (25, 30, 35, and 41 °C) and relative humidity (20, 50, 80, and 100%) for periods of 2,4, or 6 h. A logistic regression model describing the four-dimensional surface defining percent survival as a function of time, temperature, and humidity was developed. Using stepwise regression to exclude non-significant terms, the linear predictor included temperature, and the products of temperature and time, and humidity and time. The model accounted for 75% of the variance. A reparameterization of the fitted regression model suggests that survival potential is conditioned by temperature conditions prevailing during the previous 10 h. Whitefly survival after 2 h exposure ranged from ≃90% survival at 25 °C and 100% RH, to <2% survival at 41 °C and 20% r.h.. No whiteflies survived more than 2 h exposure at these latter extremes of temperature and humidity. Survival rates decreased slightly after experimental whiteflies were kept in a cage with food a further 20 h at 25 ± 2 °C, 55 ± 5% r.h. Investigations of the effects of hunger and virus infection, showed that both increased mortality.
Note:
Related Files :
Aleyrodidae
Bemisia tabaci
Ipomoea batatas
migration and dispersal
relative humidity
Solanum tuberosum
temperature
virus transmission
Show More
Related Content
More details
DOI :
Article number:
Affiliations:
Database:
Scopus
Publication Type:
article
;
.
Language:
English
Editors' remarks:
ID:
29873
Last updated date:
02/03/2022 17:27
Creation date:
17/04/2018 00:50
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Scientific Publication
Survival of Bemisia tabaci adults under different climatic conditions
80
Berlinger, M.J., Entomology Laboratory, ARO, Gilat Regional Experiment Station, Mobile Post Negev 85-280, Israel
Lehmann-Sigura, N., Entomology Laboratory, ARO, Gilat Regional Experiment Station, Mobile Post Negev 85-280, Israel
Taylor, R.A.J., Entomology Department, Ohio Agricultural Research and Development Center, Wooster, OH 44 691, United States
Survival of Bemisia tabaci adults under different climatic conditions
The ability of the sweet potato whitefly, Bemisia tabaci Gennad., to survive a range of environmental conditions was investigated in the laboratory. The range of temperature and humidity investigated corresponds to the normal climatic range during B. tabaci's summer migration in Israel. Adult whiteflies confined to small test cages were exposed to combinations of temperature (25, 30, 35, and 41 °C) and relative humidity (20, 50, 80, and 100%) for periods of 2,4, or 6 h. A logistic regression model describing the four-dimensional surface defining percent survival as a function of time, temperature, and humidity was developed. Using stepwise regression to exclude non-significant terms, the linear predictor included temperature, and the products of temperature and time, and humidity and time. The model accounted for 75% of the variance. A reparameterization of the fitted regression model suggests that survival potential is conditioned by temperature conditions prevailing during the previous 10 h. Whitefly survival after 2 h exposure ranged from ≃90% survival at 25 °C and 100% RH, to <2% survival at 41 °C and 20% r.h.. No whiteflies survived more than 2 h exposure at these latter extremes of temperature and humidity. Survival rates decreased slightly after experimental whiteflies were kept in a cage with food a further 20 h at 25 ± 2 °C, 55 ± 5% r.h. Investigations of the effects of hunger and virus infection, showed that both increased mortality.
Scientific Publication
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