{"id":1189,"date":"2026-08-03T08:47:40","date_gmt":"2026-08-03T12:47:40","guid":{"rendered":"https:\/\/site.caes.uga.edu\/entomologyresearch\/?p=1189"},"modified":"2026-08-03T08:47:40","modified_gmt":"2026-08-03T12:47:40","slug":"a-newly-established-flea-beetle-associated-with-chinese-privet-in-georgia","status":"publish","type":"post","link":"https:\/\/site.caes.uga.edu\/entomologyresearch\/2026\/08\/a-newly-established-flea-beetle-associated-with-chinese-privet-in-georgia\/","title":{"rendered":"A Newly Established Flea Beetle Associated with Chinese Privet in Georgia"},"content":{"rendered":"\n
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Fig. 1. Adult flea beetle on Chinese privet. Photo credit: Shimat Joseph, University of Georgia<\/figcaption><\/figure>\n\n\n\n

The flea beetle, Argopistes tsekooni<\/em> (Fig. 1) is an emerging pest on Chinese privet (Ligustrum sinense<\/em>) in Georgia. Native to China, it is now widely distributed in North and central Georgia. Both larvae and adults feed on foliage (Fig. 2). Larvae are leaf miners that develop within leaf tissues (Fig. 3), while adults feed externally, producing characteristic shot-hole damage (Fig. 4). Because of its close association with privet species and its ability to cause substantial defoliation, this flea beetle has attracted attention as a potential biological control agent for invasive privets.<\/p>\n\n\n\n

Chinese privet, in particular, is an evergreen shrub native to China, Vietnam, and other parts of eastern Asia. Originally introduced to many countries as an ornamental and hedgerow plant, it has become invasive in numerous regions worldwide. In the southeastern US, Chinese privet is considered one of the most serious invasive woody plant species. It is an emerging problem in ornamental landscapes, as the privets are infested with adults (Fig. 4). This flea beetle is also found causing problems in ornamental nurseries.<\/p>\n\n\n\n

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Fig. 2. Adult flea beetle feeding damage on Chinese privet. Photo credit: Shimat Joseph, University of Georgia<\/figcaption><\/figure>\n\n\n\n
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Fig. 3. Larvae of flea beetle mine leaves of Chinese privet, causing damage. Orange arrows showing larvae and red arrow showing larval exit spot. Photo credit: Shimat Joseph, University of Georgia<\/figcaption><\/figure>\n\n\n\n
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Fig. 4. Two common color morphs (yellowish-brown or red-spotted) of adult flea beetle. Photo credit: Shimat Joseph, University of Georgia<\/figcaption><\/figure>\n\n\n\n

Biology and lifecycle<\/h2>\n\n\n\n

This flea beetle can have up to three overlapping generations per year in Georgia. Females lay about 28 eggs during their lifetime. Eggs are deposited individually within leaf tissue, with one to three eggs inserted in each leaf. Because low numbers of eggs are laid on each leaf, it reduces competition among developing larvae and ensures successful completion of development within the leaf. During oviposition, females coat the eggs with a substance that protects the eggs from desiccation and secure the eggs within the leaf tissue.<\/p>\n\n\n\n

Upon hatching, neonate larvae immediately begin excavating mines within the leaf (Fig. 3). Larval development is completed within a single, progressively expanding mine (Fig. 3; orange arrows). Leaf mining reduces photosynthetic activity by destroying mesophyll tissue and can accelerate premature leaf abscission. There are three larval instars, and they all occupy a single mine that increases in width as the larvae develop. The light yellowish-green larva also excretes within the mine (Fig. 3; orange arrows), which appears as a single black line, and it feeds on the leaf tissue. The strength of the black line also increases as they develop. Severe infestations can substantially reduce the functional leaf area available for photosynthesis, weakening host plants over time.<\/p>\n\n\n\n

After completing larval development, mature larvae exit the leaf (Fig. 3; right most figure with red arrow) and move into the soil where pupation occurs. Unlike larvae, pupae are highly sensitive to physical disturbance and environmental conditions, particularly humidity. Adult beetles emerge from the soil and resume feeding on host foliage. There are three common color morphs of adult flea beetle: black, yellowish-brown, and red-spotted (two common color morphs are in Fig. 4).<\/p>\n\n\n\n

Damage<\/h2>\n\n\n\n
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Fig. 5. Adult and larval feeding damage by flea beetle on Chinese privet. Photo credits: Shimat Joseph, University of Georgia, and Michael Binoj<\/figcaption><\/figure>\n\n\n\n

 Adult feeding produces numerous small holes, commonly referred to as “shot-hole” damage, which further reduces leaf photosynthetic capacity (Fig. 5). Adult flea beetle feeding initiates with scraping of the surface layer (Fig. 1), which eventually turns into short holes Fig. 4). Serpentine leaf mining also causes serious damage. Heavy infestations can lead to extensive defoliation and premature leaf drop. The combined effects of larval leaf mining and adult foliar feeding can reduce plant vigor and may contribute to the survival of privets. They feed on young and mature leaves (Fig. 6). Their feeding damage is also observed on Chinese privet plants planted in ornamental landscapes (Fig. 7).<\/p>\n\n\n\n

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Fig. 6. Adult flea beetle feeding damage on young tissues of Chinese privet. Photo credit: Shimat Joseph, University of Georgia<\/figcaption><\/figure>\n\n\n\n
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Fig. 7. Flea beetle feeding damage on Chinese privet planted in ornamental landscapes. Photo credit: Shimat Joseph, University of Georgia<\/figcaption><\/figure>\n\n\n\n

Host range<\/h2>\n\n\n\n

This flea beetle is not restricted solely to Chinese privet, although this species appears to be among its most suitable hosts. They can feed and reproduce on several members of the tribe Oleae (Oleaceae), indicating a broader host range than initially anticipated. The beetle readily utilized other Ligustrum <\/em>species, particularly common privet (L. vulgare<\/em>). However, Japanese privet (L. japonicum<\/em>) is not a suitable host for this flea beetle. This flea beetle can feed and develop on several native North American oleaceous plants, including species of Fraxinus<\/em> (ash), Forestiera<\/em> (swampprivet), and Chionanthus<\/em> (fringetree). Leaf characteristics such as thickness and tissue structure could affect the performance of the leaf-mining larvae.<\/p>\n\n\n\n

Management<\/h2>\n\n\n\n

In its native range in China, several natural enemies attack this flea beetle. A larval parasitoid, Tetrastichus<\/em> spp., has been reported. However, no natural enemies have been reported in the U.S.<\/p>\n\n\n\n

Other management tools, such as chemical control, have not yet been developed. Based on preliminary studies, pyrethroids, including bifenthrin, appear to knock down the adults. Please thoroughly check the insecticide label for site use patterns and \u201cflea beetles\u201d as a target to determine rate and application guidelines. Once adult or larval damage occurs, it will stay as long as the leaves remain on the plant. Please contact your local county agent if you suspect beetle damage on privets planted in ornamental landscapes and ornamental nurseries.<\/p>\n\n\n\n

References<\/h2>\n\n\n\n

Cash, J. S., Anderson, C. J., & Gulsby, W. D. (2020). The ecological effects of Chinese privet (Ligustrum sinense) invasion: A synthesis. Invasive Plant Science and Management, 13(1), 3-13.<\/p>\n\n\n\n

Hanula, J. L., Horn, S., & Taylor, J. W. (2009). Chinese privet (Ligustrum sinense) removal and its effect on native plant communities of riparian forests. Invasive Plant Science and Management, 2(3), 292-300.<\/p>\n\n\n\n

Inoue, T. (2006). Seasonal development, oviposition behavior and effects of photoperiod and temperature on oviposition activity in the flea beetle, Argopistes tsekooni Chen (Coleoptera: Chrysomelidae). Japanese Journal of Applied Entomology and Zoology, 50(1), 33-42.<\/p>\n\n\n\n

Lee, C.-F., Chiang, M.-Y., & Suenaga, H. (2024). The genus Argopistes Motschulsky from Japan and Taiwan, with descriptions of three new species from Taiwan (Coleoptera, Chrysomelidae, Galerucinae, Alticini). ZooKeys, 1215, 151-183. https:\/\/doi.org\/10.3897\/zookeys.1215.132743<\/p>\n\n\n\n

Zhang, Y., Hanula, J. L., & Sun, J. (2008a). Host specificity of Argopistes tsekooni (Coleoptera: Chrysomelidae), a potential biological control agent of Chinese privet. Journal of Economic Entomology, 101(4), 1146-1151.<\/p>\n\n\n\n

Zhang, Y. Z., Hanula, J. L., & Sun, J. H. (2008b). Survey for potential insect biological control agents of Ligustrum sinense (Scrophulariales: Oleaceae) in China. Florida Entomologist, 91(3), 372-382.<\/p>\n\n\n\n

Zhang, Y., Hanula, J. L., & Sun, J. H. (2011). Herbivory effects of Argopistes tsekooni, a chrysomelid beetle, on container-grown Chinese privet, Ligustrum sinense. Insect Science, 18(2), 203-208.<\/p>\n","protected":false},"excerpt":{"rendered":"

The flea beetle, Argopistes tsekooni (Fig. 1) is an emerging pest on Chinese privet (Ligustrum sinense) in Georgia. Native to China, it is now widely distributed in North and central Georgia. Both larvae and adults feed on foliage (Fig. 2). Larvae are leaf miners that develop within leaf tissues (Fig. 3), while adults feed externally, […]<\/p>\n","protected":false},"author":499,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[],"class_list":["post-1189","post","type-post","status-publish","format-standard","hentry","category-fall-armyworm"],"_links":{"self":[{"href":"https:\/\/site.caes.uga.edu\/entomologyresearch\/wp-json\/wp\/v2\/posts\/1189","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/site.caes.uga.edu\/entomologyresearch\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/site.caes.uga.edu\/entomologyresearch\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/site.caes.uga.edu\/entomologyresearch\/wp-json\/wp\/v2\/users\/499"}],"replies":[{"embeddable":true,"href":"https:\/\/site.caes.uga.edu\/entomologyresearch\/wp-json\/wp\/v2\/comments?post=1189"}],"version-history":[{"count":4,"href":"https:\/\/site.caes.uga.edu\/entomologyresearch\/wp-json\/wp\/v2\/posts\/1189\/revisions"}],"predecessor-version":[{"id":1203,"href":"https:\/\/site.caes.uga.edu\/entomologyresearch\/wp-json\/wp\/v2\/posts\/1189\/revisions\/1203"}],"wp:attachment":[{"href":"https:\/\/site.caes.uga.edu\/entomologyresearch\/wp-json\/wp\/v2\/media?parent=1189"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/site.caes.uga.edu\/entomologyresearch\/wp-json\/wp\/v2\/categories?post=1189"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/site.caes.uga.edu\/entomologyresearch\/wp-json\/wp\/v2\/tags?post=1189"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}