Pochazia shantungensis

Pochazia shantungensis is a species of planthopper in the family Ricaniidae. Another scientific name for it is Ricania shantungensis,[1] more commonly known as the brown winged cicada[2] This species is considered an agricultural and forestry pest (M.A. Rahman et al., 2012). It is mainly found along the roadsides in the Zhejiang Province. Also found in orchards in the Shantung province.[3]  It has recently been classified as an invasive species within western parts of Korean and Turkey.[3]

Pochazia shantungensis
Scientific classification Edit this classification
Domain: Eukaryota
Kingdom: Animalia
Phylum: Arthropoda
Class: Insecta
Order: Hemiptera
Suborder: Auchenorrhyncha
Infraorder: Fulgoromorpha
Family: Ricaniidae
Genus: Pochazia
Species:
P. shantungensis
Binomial name
Pochazia shantungensis
Chou & Lu, 1977
Synonyms

Ricania shantungensis

Characteristics

The body length of P. shantungensis can vary depending on gender. Males typically exhibit a body length from vertex to tip of genitalia of 7.5 - 7.8 mm. They also exhibit a 14.0 - 14.4 mm body length from vertex to the tip of the forewings. Females are bigger and exhibit a body length from vertex to tip of genitalia of 8.3 - 8.8 mm. From the vertex to the tip of the forewings is 15.0 - 15.3 mm. The coloration of these insects range from dark brown to black. Their vertex, frons, clypeus, rostrum, and eyes are often brown to dark brown. The pronotum and mesonotum are black along with the thorax. The forewings are dark brown but have an elliptical white spot around the costal margin. It is roughly two-thirds from the base. The posterior margin of the abdomen segments are yellow.[3]

These planthoppers lay their eggs in a zigzag pattern. They are then covered with white wax filaments. These eggs are often found within trees regardless of height or direction of the branch.[4]

Geographical range

Commonly found within the Zhejiang Province in China.[4] It is also commonly found within the Shandong province of China, in the eastern coastal regions. However, they are only listed as a pest within Zhejiang Province.[4] This species has been reported as an invasive species in the coastal areas of Southern Korea starting in 2010.[5][4] These areas are similar in annual temperature and precipitation.[4]

First detected in European Turkey and Southern France in 2018, and was later detected across the Bosphorus on the Asian side of Istanbul.[5]

Habitat

P. shantungensis can live in various types of landscapes such as cities, orchards, agricultural fields, and forests.[4] Pochazia shantungensis is found to favor higher density in mountain regions and valleys.[2]

Invasive species

The species has recently been labeled as an invasive species as it has moved from its usual habitat in China to locations such as Turkey and Korea.[3] Some common hosts are apple, blueberry, Korean black raspberry, Schisandra chinensis, lacquer tree, Aralia elata, jujube, apple, Cedrela sinensis, chestnut, magnolia, quince, plum and acacia. Other common hosts in Korea: Malus pumila, Diospyros kaki, Zelkova serrataAralia elata, Styrax japonicus, Salix gracilistyla, Broussonetia kazinoki, Albizia julibrissin, Ailanthus altissima, Chaenomeles sinensis, Rubus crataegifolius, Castanea crenata, and Robinia pseudoacacia.[2]

In the Kurye, Jeonnam area the damage occurred on fruit trees, such as Cornus, persimmon, and chestnut. It seems to mainly affect fruit bearing trees/bushes. In an experiment studying the outbreak, the species preferred Cornus officinalis, Diospyros kaki, Castanea crenata, Eucommia ulmoides, and Styrax japonicus to lay their eggs.[6] The eggs were laid on the inner twigs of the trees and each egg-mass had an average of 28 eggs. This is one of the ways that Pochazia can damage the trees. The eggs suck the nutrients out of the trees and cause a sooty mold.[6]

Damage

Pochazia shantungensis has been classified as an invasive species because it has been affecting agricultural farms. The species causes damage to common agricultural plants such as apples and blueberries. As mentioned previously, it causes damage by sucking the nutrients out of the trees that it lays its egg. This indirectly causes the sooty mold disease found commonly on these plants.[6][4] These eggs hatch around mid may to early June with the spawning season occurring in mid August.

Control/mitigation

Mitigation depends on how the farm/region wants to pursue the process of removing this species. One study found that there are environmentally friendly materials that can be used to control both the nymph and adult Ricana with a mortality rate of above 80%.[6] The use of sophora and natural plant extracts can help alleviate this problem.

Another mitigation solution involves using yellow-colored sticky traps. The sticky trap made it possible to safely remove the eggs during spawning season. The traps should be placed around common locations for oviposition depending on the farm and plant. It also deters the Ricania shantungensis from laying eggs there again, as the eggs don't survive.[7]

References

  1. "Normes OEPP EPPO Standards". EPPO Bulletin. 46 (1): 25–27. 2016-03-08. doi:10.1111/epp.12267. ISSN 0250-8052.
  2. Kim, Dong Eon; Lee, Heejo; Kim, Mi-Jeong; Lee, Do-Hun (2015-09-01). "갈색날개매미충(Pochazia shantungensis) (Hemiptera: Ricaniidae)의 기주식물, 발생지역 및 잠재서식지 예측". 한국응용곤충학회지. 54 (3): 179–189. doi:10.5656/KSAE.2015.06.0.011.
  3. Hizal, E; Oztemiz, S; Gjonov, I (2019). "Ricania Shantungesis Chou & Lu 1977 (Hemiptera: Fulgoromorpha: Ricaniidae) A New Invasive Insect Species in European Turkey". Fresenius Environmental Bulletin. 12A: 9816–9820.
  4. Baek, Sunghoon; Kim, Min-Jung; Lee, Joon-Ho (2019-06-07). "Current and Future Distribution of Ricania shantungensis (Hemiptera: Ricaniidae) in Korea: Application of Spatial Analysis to Select Relevant Environmental Variables for MaxEnt and CLIMEX Modeling". Forests. 10 (6): 490. doi:10.3390/f10060490. ISSN 1999-4907.
  5. "Pochazia shantungensis". EPPO (European and Mediterranean Plant Protection Organization). 2021-05-27. Retrieved 2021-07-06.
  6. Choi, Deok-Soo; Kim, Do-Ik; Ko, Sug-Ju; Kang, Beom Ryong; Lee, Gwan-Seok; Park, Jong-Dae; 최경주 (2012-06-01). "갈색날개매미충(신칭, Ricania sp.)의 발생생태와 친환경 방제자재 선발". 한국응용곤충학회지. 51 (2): 141–148. doi:10.5656/KSAE.2012.04.0.21.
  7. Kim, Dong Hwan; Kim, Hyeong Hwan; Yang, Chang Yeol; Kang, Taek Jun; Yoon, Jung Beom; Seo, Mi Hye (2016-12-31). "Characteristic of Oviposition and Effect of Density Suppression by Yellow-colored Sticky Trap on Ricania shantungensis (Hemiptera: Ricaniidae) in Blueberry". The Korean Journal of Pesticide Science. 20 (4): 281–285. doi:10.7585/kjps.2016.20.4.281. ISSN 1226-6183.
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