Chinavia

Orian, 1965

Green Stink Bugs

Species Guides

3

Chinavia is a diverse of green stink bugs comprising over 80 distributed across the Afrotropical, Nearctic, and Neotropical regions. Species within this genus are and include significant agricultural pests, notably Chinavia hilaris (the green ), which damages cotton, soybean, and other crops in North America. The genus is characterized by green coloration retained after death, medium body size (9–19 mm), and membership in the tribe Nezarini. Several species have become subjects of research due to their economic impact on row crops and orchard systems.

Chinavia by (c) Katja Schulz, some rights reserved (CC BY). Used under a CC-BY license.Chinavia by (c) the swamp ass, some rights reserved (CC BY), uploaded by the swamp ass. Used under a CC-BY license.Chinavia hilaris by no rights reserved, uploaded by Michael Mulqueen. Used under a CC0 license.

Pronunciation

How to pronounce Chinavia: //kɪˈna.vɪ.a//

These audio files are automatically generated. While they are not always 100% accurate, they are a good starting point.

Identification

-level identification within Chinavia requires detailed morphological examination, particularly of male and female genitalia, due to similarity in external appearance among congeneric species. An electronic identification key with morphological and distributional data has been developed to aid identification. The green (Chinavia hilaris) can be distinguished from the similar southern green stink bug (Nezara viridula) by the spine between the hind legs: longer and pointed in C. hilaris versus short and rounded in N. viridula, and by antennal coloration (black bands in C. hilaris versus reddish bands in N. viridula).

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Habitat

Agricultural farmscapes, cultivated fields, and adjacent noncrop including woodlands and field borders. Noncrop include woody shrubs and trees such as black cherry (Prunus serotina), elderberry (Sambucus canadensis), mimosa (Albizia julibrissin), and pecan (Carya illinoinensis), which serve as source for crop .

Distribution

Afrotropical, Nearctic, and Neotropical regions. Specific have more restricted ranges; for example, Chinavia hilaris occurs primarily in the southeastern and midwestern United States, while C. impicticornis and C. ubica are Neotropical species associated with soybean in South America.

Seasonality

Activity patterns vary by and region. In the southeastern United States, Chinavia hilaris are present on noncrop from April through July, with nymphs appearing from late May through mid-July on hosts like black cherry and elderberry. Peak abundance in cotton occurs in late September, shortly after the autumnal equinox. In peanut-cotton farmscapes, adults and nymphs have been detected from mid-July through early September on mimosa.

Diet

feeding on plant sap from seeds, pods, flowers, stems, and leaves. Chinavia hilaris feeds on cotton bolls causing internal injury including warts and stained lint, and on pecan nuts both before and after shell hardening. Multiple crop include soybean, cotton, peanut, corn, and various legumes and woody plants.

Host Associations

  • Gossypium hirsutum - pestcotton bolls damaged causing warts and stained lint
  • Glycine max - pestsoybean pods and developing seeds
  • Arachis hypogaea - occasionalrare occurrence in peanut fields
  • Zea mays - occasionalrare occurrence in corn fields
  • Prunus serotina - noncrop black cherry, present April to early July
  • Sambucus canadensis - noncrop elderberry, colonize mid-May through July
  • Albizia julibrissin - noncrop mimosa, and nymphs mid-July to early September
  • Carya illinoinensis - noncrop and pestpecan, feed on nuts before and after shell hardening
  • Sesbania punicea - plantfirst record for Chinavia hilaris

Life Cycle

Hemimetabolous development with and five nymphal instars before adulthood. For Chinavia impicticornis and C. ubica, development from egg to requires approximately 30 days under laboratory conditions. Eggs and second-instar nymphs experience higher mortality rates than other stages. Chinavia hilaris shows a single pattern in some regions with peak late-instar nymphs in late September followed by nonreproductive adults within two weeks, contrasting with multivoltine like Nezara viridula.

Behavior

and nymphs disperse from noncrop in field borders into crops, primarily cotton. Cross-attraction to Euschistus spp. (methyl [E,Z]-2,4-decadienoate) has been documented in Chinavia hilaris, allowing capture in pheromone-baited traps. Shows aggregated spatial distribution in cotton with clustering at crop interfaces. Adults are capable of and movement between host plants.

Ecological Role

Economic pest of multiple crop systems causing direct damage through feeding and indirect effects such as delayed crop maturity. Acts as a source for crop from noncrop woody in field borders and woodlands. Serves as host for including Hexacladia hilaris (Encyrtidae), recorded in association with Chinavia erythrocnemis in Brazil.

Human Relevance

Significant agricultural pest requiring approaches including monitoring with traps, , -plant resistance, and applications. Chinavia hilaris is a key pest of cotton, soybean, and pecan in the United States, with management thresholds established for treatment decisions. such as C. impicticornis and C. ubica are secondary pests of soybean in South America with potential to become primary pests in favorable conditions.

Similar Taxa

  • Nezara viridulaBoth are green stink bugs of similar size and general appearance; distinguished by spine shape between hind legs and antennal banding coloration
  • Piezodorus guildiniiBoth are green-colored stink bugs in soybean systems; P. guildinii has distinctive reddish band across - junction and is smaller
  • Thyanta spp.Similar green coloration and body shape; Thyanta lack the long spine between hind legs present in Chinavia

More Details

Taxonomic History

The Chinavia was established by Orian in 1965. The geniculata group within Chinavia includes 14 sharing somatic and genital characteristics, with phylogenetic relationships studied from a biogeographical perspective.

Molecular Research

De novo transcriptome assembly for Chinavia impicticornis has been completed, comprising 39,478 annotated from -seq data of males and females at two stages, providing resources for studying and developing bio-rational pest management.

Voltinism Variation

Chinavia hilaris exhibits different voltinism patterns compared to sympatric Nezara viridula, with C. hilaris showing a single pattern in some regions while N. viridula has multiple generations throughout the growing season.

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Sources and further reading