Effect of Temperature on Development and Fecundity
of the Predaceous Plant Bug <Emphasis Type="Italic">Deraeocoris brevis</Emphasis> Reared on <Emphasis Type="Italic">Ephestia kuehniella</Emphasis> Eggs |
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Authors: | Dong-Soon?Kim Email author" target="_blank">Helmut?RiedlEmail author |
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Institution: | (1) Department of Plant Resources Science, College of Agriculture & Life Sciences, Cheju National University, Jeju, 690-756, South Korea;(2) Mid-Columbia Agricultural Research & Extension Center, Oregon State University, 3005 Experiment Station, Drive Hood River, OR 97031, USA |
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Abstract: | Temperature-dependent development and oviposition component models were developed for Deraeocoris brevis (Uhler) (Hemiptera: Miridae). Egg development times decreased with increasing temperature and ranged from 35.8 d at 15 °C
to 6.7 d at 32 °C. Total development times of nymphs reared on frozen Ephestia kuehniella (Zeller) (Lepidoptera: Pyralidae) eggs decreased from an estimated 55.6 d at 15 °C to 9.2 d at 32 °C and 10.0 d at 34.6 °C.
By fitting linear models to the data the lower developmental threshold temperatures for eggs, small nymphs (1st to 3rd instar),
large nymphs (4th to 5th instar), and all nymphs combined were calculated as 10.5, 12.5, 11.8, and 11.9 °C, respectively.
The thermal constants were 144.1, 90.3, 95.0, and 190.8 degree-days for each of the above stages. The non-linear model was
based on a Gaussian equation, which fit the relationship between development rate and temperature well for all stages. The
Weibull function provided a good fit for the distribution of development times of each stage. Adult longevity decreased with
increasing temperature and ranged from 52.9 d at 21.7 to 16.8 d at 32.0 °C. D. brevis had a maximum fecundity of 471 eggs per female at 24 °C, which declined to 191 eggs per female at 32 °C. Also, three temperature-dependent
components for an oviposition model of D. brevis were developed including models for total fecundity, age-specific cumulative oviposition rate, and age-specific survival
rate. |
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Keywords: | Deraeocoris brevis development models Ephestia kuehniella fecundity Hemiptera Lepidoptera longevity Miridae oviposition models Pyralidae |
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