Abstract

Pears, Pyrus pyrifolia (Burm.f.) Nak. (Rosaceae) are one of the most widely grown fruit trees in South Korea. Approximately 11% of the total pear production in 2022 was exported to countries such as the US and Vietnam. Exported pears must be free of pest species that are considered of quarantine importance by the importing countries. Herein, a list of scale insects (Hemiptera: Coccomorpha) associated with pear trees is updated. Additionally, Spilococcus pacificus (Borchsenius) is added to the list of mealybugs affecting pears in South Korea and is briefly diagnosed based on non-type specimens and illustrated using photographs. Information on its distribution and plant hosts are also provided.

References

• Basheer AM, Asslan L, Saleh A, Diab N, Mohamed E. 2016. Scale insect species (Hemiptera: Coccoidea) in Syria. Bulletin OEPP/EPPO Bulletin 46(2): 305–307.  
• Ben-Dov Y. 1994. A systematic catalogue of the mealybugs of the world (Insecta: Homoptera: Coccoidea: Pseudococcidae and Putoidae) with data on geographical distribution, host plants, biology and economic importance. Intercept Limited; Andover, UK. 686 p 
• Borchsenius NS. 1949. Insects Homoptera. suborders mealybugs and scales (Coccoidea). Family mealybugs (Pseudococcidae). Vol. VII. Fauna SSSR. Zoologicheskii Institut Akademii Nauk SSSR, New Series 38: 1–382.  
• Borchsenius NS, Kozarshevskaya EF. 1966. New species of mealybugs from the USSR. Trudy Zoologicheskogo Instituta Akademii Nauk SSSR 37: 36–40.  
• Chung HY, Won SY, Kim YK, Kim JS. 2019. Development of the chloroplast genome-based InDel markers in Niitaka (Pyrus pyrifolia) and its application. Plant Biotechnology Reports 13: 51–61.  
• Danzig EM. 1980. Coccoids of the Far-Eastern USSR (Homoptera, Coccinea) with phylogenetic analysis of scale insects fauna of the world. Nauka Publishers; Leningrad, Russia. 367 p 
• García Morales M, Denno BD, Miller DR, Miller GL, Ben-Dov Y, Hardy NB. 2023. ScaleNet: A literature-based model of scale insect biology and systematics. Available at http://scalenet.info  (Last accessed December 2023.)
• Kanda S. 1933. Two new species of the genus Pseudococcus from Yokohama and the island Palau. Annotationes Zoologicae Japonenses 14: 133–138.  
• KATI. 2023. Korea Agricultural Trade Information; production, distribution, consumption and export trends of pears. Available at https://www.kati.net/product/basisInfo.do?lcdCode=MD151  (Last accessed December 2023.)
• Kondo T, Gullan PJ, Douglas JW. 2008. Coccidology. The study of scale insects (Hemiptera: Sternorrhyncha: Coccoidea). Revista Corpoica - Ciencia y Tecnología Agropecuaria 9(2): 55–61.  
• Kwon GM, Danzig E, Park KT. 2003. Taxonomic notes of the family Pseudococcidae (Sternorrhyncha) in Korea, II. Tribes Pseudococcini. Insecta Koreana 20(3,4): 393–424.  
• Kwon GM, Han MJ. 2003. Scale insects (Sternorrhyncha) occurred on fruit trees in Korea. Korean Journal of Applied Entomology 42(4): 279–288.  
• Paik WH. 1978. Illustrated flora and fauna of Korea, vol. 22, Insecta (VI), Coccoidea. Samhwa Publishing Company; Seoul, South Korea. 481 p 
• Shah TN, Ahmed AM, Memon N. 2015. Population dynamics of cotton mealybug, Phenacoccus solepnosis Tinsely in three talukas of district Sanghar (Sindh). Journal of Entomology and Zoology Studies 3(5): 162–167.  
• Shiraiwa H. 1935. Studies on mealybugs infesting pear in Japan. Kontyû 9: 63–75.  
• Suh SJ. 2020. Host plant list of the scale insects (Hemiptera: Coccomorpha) in South Korea. Insecta Mundi 0757: 1–26.  
• Tanaka H, Kamitani S. 2022. Review of the genus Crisicoccus Ferris (Hemiptera: Coccomorpha: Pseudococcidae) in Japan with description of a new species, and the identity of a South Korean mealybug misidentified as Crisicoccus matsumotoi (Shiraiwa 1935). Zootaxa 5209(5): 555–572.  
• Tang FT. 1992. The Pseudococcidae of China. Chinese Agricultural Science Technology Press; Beijing, China. 768 p 
• Williams DJ. 2004. Mealybugs of southern Asia. The Natural History Museum and Southdene SDN.BHD.; Kuala Lumpur, Malaysia. 896 p