154 research outputs found
Pest categorisation of Colletotrichum aenigma, C. alienum, C. perseae, C. siamense and C. theobromicola
Update of the Scientific Opinion on the risks to plant health posed by Xylella fastidiosa in the EU territory
EFSA was asked to update the 2015 EFSA risk assessment on Xylella fastidiosa for the territory of the EU. In particular, EFSA was asked to focus on potential establishment, shortâ and longârange spread, the length of the asymptomatic period, the impact of X. fastidiosa and an update on risk reduction options. EFSA was asked to take into account the different subspecies and Sequence Types of X. fastidiosa. This was attempted throughout the scientific opinion but several issues with data availability meant that this could only be partially achieved. Models for risk of establishment showed most of the EU territory may be potentially suitable for X. fastidiosa although southern EU is most at risk. Differences in estimated areas of potential establishment were evident among X. fastidiosa subspecies, particularly X. fastidiosa subsp. multiplex which demonstrated areas of potential establishment further north in the EU. The model of establishment could be used to develop targeted surveys by Member States. The asymptomatic period of X. fastidiosa varied significantly for different host and pathogen subspecies combinations, for example from a median of approximately 1 month in ornamental plants and up to 10 months in olive, for pauca. This variable and long asymptomatic period is a considerable limitation to successful detection and control, particularly where surveillance is based on visual inspection. Modelling suggested that local eradication (e.g. within orchards) is possible, providing sampling intensity is sufficient for early detection and effective control measures are implemented swiftly (e.g. within 30 days). Modelling of longârange spread (e.g. regional scale) demonstrated the important role of longârange dispersal and the need to better understand this. Reducing buffer zone width in both containment and eradication scenarios increased the area infected. Intensive surveillance for early detection, and consequent plant removal, of new outbreaks is crucial for both successful eradication and containment at the regional scale, in addition to effective vector control. The assessment of impacts indicated that almond and Citrus spp. were at lower impact on yield compared to olive. Although the lowest impact was estimated for grapevine, and the highest for olive, this was based on several assumptions including that the assessment considered only Philaenus spumarius as a vector. If other xylemâfeeding insects act as vectors the impact could be different. Since the Scientific Opinion published in 2015, there are still no risk reduction options that can remove the bacterium from the plant in open field conditions. Shortâ and longârange spread modelling showed that an early detection and rapid application of phytosanitary measures, consisting among others of plant removal and vector control, are essential to prevent further spread of the pathogen to new areas. Further data collection will allow a reduction in uncertainty and facilitate more tailored and effective control given the intraspecific diversity of X. fastidiosa and wide host range.Additional co-authors: EFSA Panel on Plant Health (PLH), Wopke van der Werf, Antonio Vicent Civera, Jonathan Yuen, Lucia ZappalĂ , Donato Boscia, Gianni Gilioli, Rodrigo Krugner, Alexander Mastin, Anna Simonetto, Joao Roberto Spotti Lopes, Steven White, JosĂ© Cortinas Abrahantes, Alice Delbianco, Andrea Maiorano, Olaf MosbachâSchulz, Giuseppe Stancanelli, Michela Guzzo, Stephen Parnel
Pest categorisation of Grapholita inopinata
The EFSA Panel on Plant Health (PLH) performed a pest categorisation of Grapholita inopinata,
(Lepidoptera: Tortricidae), the Manchurian fruit moth, for the territory of the EU. G. inopinata is a welldefined species that is recognised as a major pest of Malus spp. in Far East Russia, Eastern Siberia and
northern China. G. inopinata is less common in Japan where it is not a serious pest. G. inopinata is not
known to occur in the EU. G. inopinata is listed in Annex IIAI of 2000/29 EC as a harmful organism
regulated on Cydonia, Malus, Prunus and Pyrus from non-European countries. Adult G. inopinata
emerge in the summer, mate and lay eggs on host leaves and fruit. Larvae burrow into the fruit to
develop. Larvae exit fruit and overwinter under bark, under leaf litter or in the soil. Import of host fruit
provides a potential pathway into the EU. Restrictions on the import of host plants for planting close
other potential pathways. G. inopinata occurs in a range of climates in Asia, some of which also occur
in the EU. Wild and commercially grown hosts are available within the EU. G. inopinata has the
potential to establish within the EU. There could be one or two generations per year as in its native
range. Impacts could occur in pome fruit orchards. The level of impacts would be uncertain.
Phytosanitary measures are available to reduce the likelihood of introduction of G. inopinata.
G. inopinata meets all the criteria assessed by EFSA PLH to satisfy the definition of a Union quarantine
pest. G. inopinata does not meet the criteria of occurring within the EU, nor plants for planting being
the principal means of spread, so does not satisfy all the criteria for it to be regarded as a Union
regulated non-quarantine pest (RNQP)
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