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Effects of acclimation on the thermal tolerance of the brown planthopper Nilaparvata lugens (Stål)

Effects of acclimation on the thermal tolerance of the brown planthopper Nilaparvata lugens (Stål) The influence of acclimation on the cold and heat tolerance of Nilaparvata lugens was determined by measurements of the critical thermal minimum and maximum (CTmin and CTmax), chill and heat coma temperature (CCT and HCT) and lower and upper lethal temperature (LLT50 and ULT50). First‐instar nymphs were acclimated for 5 days at 15 °C and for 2 days at 30 °C and compared with a population maintained at 23 °C; for the adult comparisons, first‐instar nymphs were reared at 15, 23 and 30 °C until adult emergence, requiring development periods of 50–55, 30–35 and 18–20 days, respectively. The thermal tolerance limits of both age groups changed significantly with acclimation and were correlated with rearing temperature. Across the 48 separate measurements of thermal tolerance (CTmin, CCT, CTmax, HCT, LLT50 and ULT50 of nymphs and adult males and females), the temperature differential across the three indices of cold tolerance after acclimation at 15 °C compared with a population maintained at 23 °C were between 0.5–2.8 and 2.9–5.0 °C for nymphs and adults, respectively. By comparison, acclimation at 30 °C increased heat tolerance in terms of changes in the CTmax, HCT and ULT50, and the temperature differentials compared with the 23 °C population were between 1.1–3.3 °C for nymphs and 0.3–1.6 °C for adults. These data indicate that, under the acclimation regimes applied to N. lugens, increases in cold tolerance were greater than heat tolerance. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Agricultural and Forest Entomology Wiley

Effects of acclimation on the thermal tolerance of the brown planthopper Nilaparvata lugens (Stål)

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References (119)

Publisher
Wiley
Copyright
© 2014 The Royal Entomological Society
ISSN
1461-9555
eISSN
1461-9563
DOI
10.1111/afe.12047
Publisher site
See Article on Publisher Site

Abstract

The influence of acclimation on the cold and heat tolerance of Nilaparvata lugens was determined by measurements of the critical thermal minimum and maximum (CTmin and CTmax), chill and heat coma temperature (CCT and HCT) and lower and upper lethal temperature (LLT50 and ULT50). First‐instar nymphs were acclimated for 5 days at 15 °C and for 2 days at 30 °C and compared with a population maintained at 23 °C; for the adult comparisons, first‐instar nymphs were reared at 15, 23 and 30 °C until adult emergence, requiring development periods of 50–55, 30–35 and 18–20 days, respectively. The thermal tolerance limits of both age groups changed significantly with acclimation and were correlated with rearing temperature. Across the 48 separate measurements of thermal tolerance (CTmin, CCT, CTmax, HCT, LLT50 and ULT50 of nymphs and adult males and females), the temperature differential across the three indices of cold tolerance after acclimation at 15 °C compared with a population maintained at 23 °C were between 0.5–2.8 and 2.9–5.0 °C for nymphs and adults, respectively. By comparison, acclimation at 30 °C increased heat tolerance in terms of changes in the CTmax, HCT and ULT50, and the temperature differentials compared with the 23 °C population were between 1.1–3.3 °C for nymphs and 0.3–1.6 °C for adults. These data indicate that, under the acclimation regimes applied to N. lugens, increases in cold tolerance were greater than heat tolerance.

Journal

Agricultural and Forest EntomologyWiley

Published: Jan 1, 2014

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