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15 April 2021 Effects of Dehumidification on the Survivorship of Four Psocid Species
Abena F. Ocran, George P. Opit, Bruce H. Noden, Frank H. Arthur, Bradford M. Kard
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Abstract

Psocids are damaging stored-product pests. In this study, eggs and early-instar nymphs, adults, and all life stages of Liposcelis entomophila, L. decolor, L. bostrychophila, and L. paeta were subjected to 43, 50, or 75% (Control) relative humidity (RH) for 2, 4, 6, 8, 10, 12, 14, or 16 d at 30.0°C. All adults of these species died within 8 d at both 43 and 50% RH, except for L. bostrychophila, which required 12 d at 50% RH for 100% mortality to occur. For all life stages and eggs and early-instar nymphs, maximum survival times (times to 100% mortality) at 43 or 50% RH for L. entomophila, L. decolor, L. bostrychophila, and L. paeta, were 8 and 10 d, 8 and 12 d, 12 and 14 d, and 12 and 16 d, respectively. During this study, numbers of nymphs and adults of all species 14 d after the RH treatments increased within the 75% RH Control arenas. Different species and life stages responded differently to 43 and 50% RH, as time to kill all stages of the four psocid species was 8–12 and 10–16 d, respectively. Results indicate that using a specific RH environment may be effective in psocid management.

© The Author(s) 2021. Published by Oxford University Press on behalf of Entomological Society of America. All rights reserved. For permissions, please e-mail: journals.permissions@oup.com.
Abena F. Ocran, George P. Opit, Bruce H. Noden, Frank H. Arthur, and Bradford M. Kard "Effects of Dehumidification on the Survivorship of Four Psocid Species," Journal of Economic Entomology 114(3), 1380-1388, (15 April 2021). https://doi.org/10.1093/jee/toab066
Received: 22 October 2020; Accepted: 5 March 2021; Published: 15 April 2021
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