Preimaginal stages of Chroantha ornatula (Herrich-Schaffer, 1842) (Heteroptera: Pentatomidae) in Central Asia

Abstract

The description of previously unknown immature stages of Chroantha ornatula (Herrich-Schaffer, 1842) is given. Collection and observation were made during 1987-2002 in Turkmenistan. Observations on the eggs and larval development were made in the nature and in the laboratory cages. Distribution of the species is reconsidered and its northern border Central Asia is determined. Literature information on biotopic associations and host plants is summarized. Adults and larvae hibernate. There are two generations per year. The eggs of the first generation are laid in February. This generation is not numerous and specimens rarely observed. The adults of the second generation appear from the end of July to the beginning of August and immediately begin to copulate and oviposite. The females with well-developed eggs are observed until the end of September and larvae of any stages can be found from August to the second half of October, when they start hibernation. Each clutch contains up to 70 eggs positioned in chess order. Eggs development takes 9-10 days. Mean size of an egg is 0,82x0,59 mm. Six new host plants are recorded belong to Chenopodiaceae. Immature stages of Ch. ornatula are described.

Keywords

• Heteroptera
• Pentatomidae
• Chroantha ornatula
• preliminary stages
• Central Asia
• area
• oviposition
• life cycle
• host plants