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Open AccessArticle

Age-Stage, Two-Sex Life Tables of the Predatory Mite Cheyletus Malaccensis Oudemans at Different Temperatures

Academy of National Food and Strategic Reserves Administration, National Engineering Laboratory of Grain Storage and Logistics, Henan Collaborative Innovation Center of Grain Crops, Jiangsu Collaborative Innovation Center for Modern Grain Circulation and Safety, No. 11 Baiwanzhuang Street, Beijing, 100037, China
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Insects 2020, 11(3), 181; https://doi.org/10.3390/insects11030181
Received: 12 January 2020 / Revised: 26 February 2020 / Accepted: 6 March 2020 / Published: 12 March 2020
(This article belongs to the Special Issue Biological Control and Insect Pathology)
Cheyletus malaccensis Oudemans is a predatory mite inhabiting grain depots in China. The relationship between temperature and the population growth rate of C. malaccensis is useful for predicting its population dynamics. Age-stage, two-sex life tables of the predator, C. malaccensis, reared on Acarus siro were constructed under laboratory conditions at 22, 24, 28, 30, and 32 °C, 75% relative humidity, and a 0:24 h (L:D) photoperiod. Increasing temperature shortened the development time of the immature stages. The complete generation time of C. malaccensis ranged from 11.10 d to 27.50 d. Life table parameters showed that 28 °C was the optimum temperature for the growth and development of C. malaccensis; populations could increase rapidly at this temperature. The highest net reproductive rate (R0 = 290.25) and highest fecundity (544.52) occurred at 28 °C. Temperature significantly affected the intrinsic rate of increase (r), fecundity, and finite rate of increase (λ). The values of age-specific fecundity (high to low) were 28 °C > 24 °C > 30 °C > 32 °C > 22 °C, while the values of age-stage-specific fecundity had the same trend. View Full-Text
Keywords: Cheyletus malaccensis Oudemans; biological control; age-stage two-sex life table Cheyletus malaccensis Oudemans; biological control; age-stage two-sex life table
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Sun, W.; Cui, M.; Xia, L.; Yu, Q.; Cao, Y.; Wu, Y. Age-Stage, Two-Sex Life Tables of the Predatory Mite Cheyletus Malaccensis Oudemans at Different Temperatures. Insects 2020, 11, 181.

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