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Color Changes and Development of Eggs of Rice Stink Bug (Hemiptera: Pentatomidae) in Response to Temperature

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Abstract:

The progress of embryonic development may be observed in eggs of the rice stink bug, Oebalus pugnax (F.) (Hemiptera: Pentatomidae), because obvious color or color pattern changes may be viewed through the transparent chorion. All viable egg masses of the rice stink bug progressed through similar color or color pattern changes at the six constant temperatures that ranged from 21.1 to 37.8°C. Whenever the length of time within a pattern was expressed as a percentage of the total developmental time, the proportion of time within a pattern was not influenced by changes in temperature. However, temperatures used in this study were within the linear range for total development and within each color pattern of the rice stink bug eggs described in this article. The upper lethal constant temperature was estimated to be 37.8°C. Although phases of blastokinesis could be viewed, most were not related to color patterns in this study, except the katatrepsis phase, which is pictorially described. Rice stink bug egg masses consisted of two rows, the eggs being in contact but those of one row alternate in position with the other row. Embryos in both rows were oriented with the ventral surface toward the center of the egg mass.

Keywords: Oebalus pugnax; color changes; development; rice stink bug eggs; temperature

Document Type: Research Article

DOI: http://dx.doi.org/10.1603/008.102.0408

Publication date: July 1, 2009

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  • Annals of the Entomological Society of America is published in January, March, May, July, September, and November. Annals especially invites submission of manuscripts that integrate different areas of insect biology, and address issues that are likely to be of broad relevance to entomologists. Articles also report on basic aspects of the biology of arthropods, divided into categories by subject matter: systematics; ecology and population biology; arthropod biology; arthropods in relation to plant diseases; conservation biology and biodiversity; physiology, biochemistry, and toxicology; morphology, histology, and fine structure; genetics; and behavior.
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