Jacobiasca formosana

Jacobiasca formosana, the tea jassid, is an insect species belonging to the subfamily Typhlocybinae of the family Cicadellidae. Plant hosts include Gossypium (cotton) species[1] and, notably, Camellia sinensis (Chinese tea plants). The species is distributed throughout East, Southeast, and South Asia (including in China, India, Malaysia, Pakistan, Sri Lanka, Taiwan, and Thailand).[1]

Jacobiasca formosana
Scientific classification Edit this classification
Domain: Eukaryota
Kingdom: Animalia
Phylum: Arthropoda
Class: Insecta
Order: Hemiptera
Suborder: Auchenorrhyncha
Family: Cicadellidae
Genus: Jacobiasca
Species:
J. formosana
Binomial name
Jacobiasca formosana
(Paoli, 1932)
Jacobiasca formosana
Chinese茶小綠葉蟬
Alternative Chinese name
Chinese小綠浮塵子
Second alternative Chinese name
Chinese浮塵仔

Names

Common names for J. formosana include the small green leafhopper, tea green leafhopper, or tea jassid.[2] In Mandarin Chinese, the insect is referred to as 茶小綠葉蟬 (chá xiǎo lǜ yèchán) or 小綠浮塵子 (xiǎo lǜ fúchénzǐ).[2] In Siyen Hakka, it is called 著涎 (Zhe xián), 著蜒 (Zhe yán), or 著煙 (Zhe yān). In Taiwanese, it is 浮塵仔 (phû-tîn-á), 蜒仔 (iân-á), 蝝仔 (iân-á), 烟仔 (ian-á), 趙烟 (tiō-ian), 跳仔 (tiô-á) or 青仔 (chhiⁿ-á).[2][3]

Confusingly, Empoasca vitis (the false-eye leafhopper; 假眼小綠葉蟬) is also called the tea green leafhopper[4] and Empoasca flavescens (蓮霧小綠葉蟬) is also called the small green leafhopper.[5]

Description and habits

The mature J. formosana are slender and yellowish-green with translucent wings with a body length of about 3 mm (0.1 in).[2]

The adults eat young plant shoots for the nutrient solution within, which retards bud growth and causes yellow-green bud curling.[2] The leaf margins turn brown and eventually fall off.[2]

Use in tea production

Jacobiasca formosana is important in the production of Taiwan's dongfang meiren tea. The tea, which is an oolong tea with a flavor likened to ripened fruit and honey, is made from leaves partially eaten by these insects.[6] The insects, which thrive in warmer, pollution-free environments, suck the phloem juices of the tea stems, leaves, and buds, producing monoterpene diol and hotrienol which give the tea its unique flavor.[6]

This process has inspired makers of other types of tea such as dongding oolong tea and the east coast black teas of Hualien and Taitung to withhold pesticide use in order to replicate this process in other teas.[7] Similar action of jassids and thrips helps form the muscatel-like flavor of India's second flush Darjeeling tea.[8]

See also

References
  1. Dmitry A. Dmitriev. "Jacobiasca formosana (Paoli, 1932)" at 3I Interactive Keys and Taxonomic Databases. Retrieved 20 July 2012.
  2. 茶小綠葉蟬 Archived 2013-10-23 at the Wayback Machine Taiwan Agricultural Chemicals and Toxic Substances Research Institute, Council of Agriculture. Retrieved 20 July 2012.(in Chinese)
  3. 台灣茶小綠葉蟬 Archived 2013-01-05 at archive.today [Taiwan tea leafhopper] (in Chinese)
  4. Jin, S; et al. (Sep 2012). "Characterization of EPG waveforms for the tea green leafhopper, Empoasca vitis Göthe (Hemiptera: Cicadellidae), on tea plants and their correlation with stylet activities". J Insect Physiol. 58 (9): 1235–44. doi:10.1016/j.jinsphys.2012.06.008. PMID 22750027.
  5. 蓮霧小綠葉蟬 Archived 2013-10-23 at the Wayback Machine Taiwan Agricultural Chemicals and Toxic Substances Research Institute, Council of Agriculture. Retrieved 20 July 2012.(in Chinese)
  6. Kazufumi Yazaki. "Molecular Mechanism of Plant - Insect Interaction via Plant Volatile Compounds and its Application." Archived 2012-05-08 at the Wayback Machine Exploratory Research at the Institute of Sustainability Science, Kyoto University, 2007. Retrieved 20 July 2012.
  7. Stephane Erler. "A Study of Oriental Beauty". Tea Masters Blog. 1 February 2007. Retrieved 20 July 2012.
  8. Bornali Gohain et al. "Understanding Darjeeling Tea Flavour on a Molecular Basis". Plant Molecular Biology 78.6 (2012), 577-597, DOI: 10.1007/s11103-012-9887-0 Retrieved 20 July 2012.
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