Pest categorisation of Exomala orientalis
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Title
Pest categorisation of Exomala orientalisAuthor (s)
Date
2020-04-22Publisher
European Food Safe Authority (EFSA)ISSN
1831-4732Bibliographic citation
EFSA PLH Panel (EFSA Panel on Plant Health), Bragard C, Dehnen-Schmutz K, Di Serio F, Gonthier P, Jacques M-A, Jaques Miret JA, Justesen AF, Magnusson CS, Milonas P, NavasCortes JA, Parnell S, Potting R, Reignault PL, Thulke H-H, Van der Werf W, Civera AV, Yuen J, Zappala L, Czwienczek E, Streissl F and MacLeod A, 2020. Scientific Opinion on the pest categorisation of Exomala orientalis. EFSA Journal 2020;18(4):6103, 29 pp. https://doi.org/10.2903/j.efsa.2020.6103Type
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Abstract
The EFSA Panel on Plant Health performed a pest categorisation of Exomala orientalis (Coleoptera:
Rutelidae) (Oriental beetle) for the EU. Larvae feed on the roots of a variety of hosts including most
grasses and ... [+]
The EFSA Panel on Plant Health performed a pest categorisation of Exomala orientalis (Coleoptera:
Rutelidae) (Oriental beetle) for the EU. Larvae feed on the roots of a variety of hosts including most
grasses and many vegetable crops. Maize, pineapples, sugarcane are among the main host plants.
Larvae are particularly damaging to turfgrass and golf courses. The adults feed on flowers and other
soft plant tissues (e.g. Alcea rosea, Dahlia, Iris, Phlox and Rosa). Eggs are laid in the soil. Larvae feed
on host roots and overwinter in the soil. Adults emerge from pupae in the soil in May-June and are
present for about 2 months. E. orientalis usually completes its life cycle in 1 year although individuals
can spend two winters as larvae. Commission Implementing Regulation (EU) 2019/2072 (Annex IIA)
regulates E. orientalis. The legislation also regulates the import of soil attached to plants for planting
from third countries; therefore, entry of E. orientalis eggs, larvae and pupae is prevented. E. orientalis
is native to Japan or the Philippine islands. It is also found in East Asia and India, Hawaii and northeastern USA. It is assumed to have reached USA via infested nursery stock. Plants for planting
(excluding seeds) and cut flowers provide potential pathways for entry into the EU. E. orientalis has
been intercepted only once in the EU, on Ilex crenata bonsai. Climatic conditions and the availability of
host plants provide conditions to support establishment in the EU. Impacts on maize, grassland and
turfgrass would be possible. There is uncertainty on the extent of the impact on host plants which are
widely commercially grown (e.g. maize) Phytosanitary measures are available to reduce the likelihood
of entry. E. orientalis satisfies the criteria that are within the remit of EFSA to assess for it to be
regarded as a potential Union quarantine pest. Of the criteria that are within the remit of EFSA to
assess for it to be regarded as a potential Union regulated non-quarantine pest, E. orientalis does not
meet the criterion of occurring in the EU. [-]
Is part of
EFSA Journal 2020;18(4):6103Rights
© 2020 European Food Safety Authority. EFSA Journal published by John Wiley and Sons Ltd on behalf of European Food Safety Authority.
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