Journal of Threatened Taxa | www.threatenedtaxa.org | 26 August
2019 | 11(10): 14385–14387
Aquilaria malaccensis (Malvales: Thymelaeaceae): a new
host plant record for Deudorix epijarbas cinnabarus (Lepidoptera:
Lycaenidae) in Malaysia
Kah Hoo
Lau 1 & Su Ping Ong 2
1,2 Forest
Research Institute Malaysia (FRIM), 52109 Kepong, Selangor, Malaysia.
1 laukh@frim.gov.my
(corresponding author), 2 ongsuping@frim.gov.my
doi: https://doi.org/10.11609/jott.4845.11.10.14385-14387
Editor: George Mathew, (Ex) Emeritus
Scientist, KFRI, Peechi, India. Date
of publication: 26 August 2019 (online & print)
Manuscript details: #4845 | Received 24 January 2019
| Final received 08 April 2019 | Finally accepted 29 July 2019
Citation: Lau, K.H. & S.P. Ong (2019). Aquilaria malaccensis (Malvales: Thymelaeaceae): a new host plant record for Deudorix epijarbas cinnabarus (Lepidoptera: Lycaenidae)
in Malaysia. Journal of Threatened Taxa 11(10): 14385–14387. https://doi.org/10.11609/jott.4845.11.10.14385-14387
Copyright: © Lau & Ong 2019. Creative Commons Attribution
4.0 International License. JoTT allows unrestricted use, reproduction, and
distribution of this article in any medium by adequate credit to the author(s)
and the source of publication.
Funding: ITTO-CITES Work
Program and Government of
Malaysia.
Competing interests: The authors declare no competing
interests.
Acknowledgements: The research
was funded by ITTO Work Program element ‘Support to ITTO-CITES Implementation
for Tree Species and Trade/Market Transparency’ and ‘Conservation of Selected
Threatened Flora in Peninsular Malaysia’ project under the 11th
Malaysian Plan. We would like to thank
Laurence G. Kirton and Phon Chooi
Khim for the identification of the butterfly and
assistance.
Aquilaria malaccensis Lam. (Thymelaeaceae), one
of the most sought-after agarwood producing species, was recently lifted to
Critically Endangered (Harvey-Brown 2018) from Vulnerable (Asian
Regional Workshop 1998) under the global International Union for Conservation
of Nature (IUCN) Red List. This
catastrophe clearly indicates that this species is in dire need of urgent
attention from plant conservationists, policy makers, and enforcers. This tree can be found as an under-story
species in tropical forests. The
species’ natural range includes India, Myanmar, Sumatra, Peninsular Malaysia,
Singapore, Borneo, and the Philippines (Tawan
2004). In 2017, close to 350,000kg of A.
malaccensis derivatives and products were
exported (and re-exported) from many countries including the non-range states
(CITES Trade Database 2019). Essential
oils derived from this tree species have been in high demand and are widely
used in traditional medicines (Ding 1960; Nor Azah et
al. 2008; Jayachandran et al. 2014), in the production of incense and perfumery
in the Middle East (Barden et al. 2000; Chang et al. 2001). The lucrative international trade for many
years had ultimately driven the genus into the list of Convention on
International Trade in Endangered Species of Wild Fauna and Flora (CITES)
Appendix II in 2005. Species listed
under Appendix II require an export permit and a re-export certificate before
any international trade can take place.
Consequently, a ‘non-detriment findings’ is needed to show that an
export will not be detrimental to the survival of that species in the wild.
Phenological studies on wild A. malaccensis
trees in Penang Island and Perak (Peninsular Malaysia) started since 2011
and collection of aborted flowers, fruit capsules and seeds were done using
10‒20 square-framed nettings measuring 1m × 1m placed at four selected mature
trees. Aborted fruits on the forest
ground were randomly picked for inspection.
Towards the end of the fruiting season on 23 May 2018 in Penang Island,
several freshly aborted fruits were collected from the ground and upon
dissection, one was seen infested with a living larva. The moth larva of Pitama
hermesalis Walker was previously reported to
infest A. malaccensis fruit (Ong & Lau
2016). Closer observation of the
physical appearance of the larva, however, resulted in ambiguity of the
identity and therefore, the larva was reared in a plastic container [outer
dimensions; 13.4 (length) × 5.8 (width) × 22.0 (height) cm] in the laboratory
at 26–28°C and 60–80% humidity.
The sluggish, late-instar larva (Image 1) pupated
eight days later inside the fruit (Image 2) and pupation was completed in eight
days. The adult was identified as a
female Deudorix epijarbas
cinnabarus Fruhstorfer
with a wingspan of 2.7cm (Image 3). This
female specimen has a dull colour on the upper side – dark brown to black while
the underside is grey brown with white markings. The black lobes and tails protruding from the
hindwings are used to deceive predators as they resemble the head and antennae
when its wings are folded (Image 4) (Kirton 2014). Subspecies cinnabarus
occurs from Singapore to southern Thailand (Kirton 2014).
Deudorix epijarbas Moore is a seed and fruit feeder. In India, Thailand and China, it has attained
pest status due to its damaging habits on fruit crops such as Punica granatum (pomegranate)
(Dubey et al. 1993), Litchi chinensis (lychee)
(Balakrishnan et al. 2019), Dimocarpus longan (longan) (DAFF 2004)
and Nephelium sp. (rambutan) (CABI
2019). In Malaysia, the host plants of D.
epijarbas were Scorodocarpus
borneensis (garlic nut), Aesculus
indica (Indian Horse Chestnut), Panicum sp.
(panicgrass) and Pinus kesiya
(Khasya Pine) in addition to pomegranate and rambutan
(Robinson et al. 2010). Interestingly,
the larva was feeding on the leaves of P. kesiya in
the records by Robinson et al. (2010).
This indicated that the larva could consume other parts of the plant
when the seeds or fruits are depleted or unavailable, however, more information
on the life history and host plants of this cryptic butterfly are needed. The A. malaccensis
fruit had aborted prematurely as a result of D. e. cinnabarus
attack; however, its presence is unlikely to have any significant impact on
the reproduction of A. malaccensis trees.
References
Asian Regional Workshop
(Conservation & Sustainable Management of Trees, Viet Nam, August 1996).
(1998). Aquilaria
malaccensis. The IUCN Red List of Threatened
Species 1998: e.T32056A9677920. DOI: https://doi.org/10.2305/IUCN.UK.1998.RLTS.T32056A9677920.en
Balakrishnan, V., P. Churi & K. Saji (2019). Deudorix epijarbas (Moore, [1858])–Cornelian¡. In: Kunte, K., S. Sondhi, & P.
Roy (Chief Editors). Butterflies of India, v. 2.59. Indian
Foundation for Butterflies. Accessed: 17 Jan 2019.
http://www.ifoundbutterflies.org/sp/572/Deudorix-epijarbas
Barden, A., N. Awang Anak, T. Mulliken & M. Song
(2000). Heart of the matter: Agarwood use
and trade and CITES implementation for Aquilaria
malaccensis. Cambridge, UK: TRAFFIC
International.
CABI (2019 ). Nephelium
lappaceum. In: Invasive Species Compendium.
Wallingford, UK: CAB International. Accessed: 17 Jan 2019.
Chang, Y.S., M.A. Nor Azah & A.A. Said (2001). Gaharu: A prized incense
from Malaysia. Malaysian Oil Science and Technology 9(2): 26−27.
CITES Trade Database (2019). Gross exports report of Aquilaria
malaccensis for 2017. Downloaded on 29 July 2019.
https://trade.cites.org
DAFF (Department of Agriculture,
Fisheries and Forestry) (2004). Longan and
lychee fruit from the People’s Republic of China and Thailand. Final Import
Risk Analysis Report. Part B, Longan and Lychee Fruit
from China and Thailand, 176pp.
http://www.agriculture.gov.au/SiteCollectionDocuments/ba/memos/2004/plant/ll_finalb.pdf
Ding, H. (1960). Thymelaeaceae. In: van Steenis, C.G.G.J.
(ed). Flora malesiana
series I. Groningen, the Netherlands: Wolters-Noordhoff
Publishing 6: 1−15. https://doi.org/10.2305/IUCN.UK.2018-1.RLTS.T32056A2810130.en
Dubey, J.K., A. Nath & J.R.
Thakur (1993). Chemical control of pomegranate
fruit borer(s), Virachola isocrates (Fabr.) and Deudorix epijarbas (Moore).
Indian Forester 119(11): 928–931.
Harvey-Brown, Y. (2018). Aquilaria malaccensis. The IUCN Red List of Threatened Species
2018: e.T32056A2810130. https://doi.org/10.2305/IUCN.UK.2018-1.RLTS.T32056A2810130.en
Downloaded
on 16 October 2018.
Jayachandran, K., I. Sekar, K.T. Parthiban, D. Amirtham
& K.K. Suresh (2014). Analysis of
different grades of Agarwood (Aquilaria malaccensis Lamk.) oil
through GC-MS. Indian Journal of Natural Products and Resources 5(1):
44‒47.
Kirton, L.G. (2014). A Naturalist’s Guide to the Butterflies of Peninsular
Malaysia, Singapore and Thailand.
John Beaufoy Publishing Limited, Oxford, 176 pp.
Nor Azah,
M.A., Y.S. Chang, J. Mailina, A.A. Said, J.A. Majid,
S.S. Husni, H.N. Hasnida
& Y.N. Yasmin (2008). Comparison
of chemical profiles of selected Gaharu oils from
Peninsular Malaysia. The Malaysian Journal of Analytical Sciences 12(2):
338‒340.
Ong, S.P. & K.H. Lau (2016). Aquilaria malaccensis fruit borer in Peninsular Malaysia. Current
Science 110(4): 504−505. https://www.researchgate.net/publication/298715777_Aquilaria_malaccensis_fruit_borer_in_Peninsular_Malaysia
Robinson, G.S., P.R. Ackery, I.J. Kitching, G.W. Beccaloni
& L.M. Hernández (2010). HOSTS–A
Database of the World’s Lepidopteran Hostplants. Natural History Museum,
London. Accessed on 17 Jan 2019. http://www.nhm.ac.uk/hosts
Tawan, C.S. (2004). Thymelaeaceae, pp.
433‒484. In: Soepadmo, E., L.G. Saw & R.C.K.
Chung (eds.). Tree Flora of Sabah and Sarawak, Vol. 5. Forest Research
Institute Malaysia, 528pp.