journal article Aug 31, 2023

Pest management of postharvest potatoes: lethal, sublethal and transgenerational effects of the ectoparasitic mite Pyemotes zhonghuajia on the potato worm Phthorimaea operculella

Pest Management Science Vol. 79 No. 12 pp. 5250-5259 · Wiley
Abstract
Abstract

BACKGROUND

Potato,
Solanum tuberosum
, is one of the most important food crops in the world, playing a significant role in global food security. However, many potato industries and farms may suffer losses of tuber yield and quality in storage due to lepidopteran pests. Here, we evaluated the effectiveness of an ectoparasitic idiobiont mite
Pyemotes zhonghuajia
in the biological control of the potato tuber moth (PTM)
Phthorimaea operculella
by determining the lethal, sublethal (nonconsumptive) and transgenerational effects of
P. zhonghuajia
of various population densities and exposure durations on PTM survival, development and reproduction.



RESULTS

Pyemotes zhonghuajia
females were capable of killing all instar stages of PTM, while resistance to mite parasitism increased with the development of PTM life stage. The mortality of mature larvae (i.e., fourth instar) and pupae increased with increasing mite density and exposure duration.
P. zhonghuajia
imposed significant negative sublethal impacts on PTM pupation rate, female fecundity and adult longevity but not on immature development. The sublethal stress was transgenerational, resulting in lower reproduction in the offspring generation.



CONCLUSION

P. zhonghuajia
induces lethal, sublethal and transgenerational effects and significantly decreases PTM survival and reproductive out, demonstrating its high efficiency in the biological control of PTM. Our study provides insight into the mechanisms underlying the nonconsumptive effects of parasitism in an ectoparasite–host system and delivers critical information for the design and implementation of augmentative releases of
P. zhonghuajia
in the biological control of PTM in potato storage. © 2023 Society of Chemical Industry.
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Details
Published
Aug 31, 2023
Vol/Issue
79(12)
Pages
5250-5259
License
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Authors
Funding
National Natural Science Foundation of China Award: 32060637
Cite This Article
Jian‐Feng Liu, Xiong Z He, Shuai Ye, et al. (2023). Pest management of postharvest potatoes: lethal, sublethal and transgenerational effects of the ectoparasitic mite Pyemotes zhonghuajia on the potato worm Phthorimaea operculella. Pest Management Science, 79(12), 5250-5259. https://doi.org/10.1002/ps.7730
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