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Invasive alien species, introduced and/or spread outside their natural habitats, have affected native biodiversity in almost every ecosystem type on earth and are one of the greatest threats to biodiversity. Since the 17th century, invasive alien species have contributed to nearly 40% of all animal extinctions for which the cause is known (CBD, 2006).
The problem continues to grow at great socio-economic, health and ecological cost around the world. Invasive alien species exacerbate poverty and threaten development through their impact on agriculture, forestry, fisheries and natural systems, which are an important basis of peoples' livelihoods in developing countries. This damage is aggravated by climate change, pollution, habitat loss and human-induced disturbance.
http://www.cbd.int/idb/2009/resources/booklet/default.shtml
Some of these species are dangerous plant pests and diseases that can affect both wild flora and cultivated crops severely. The European and Mediterranean Plant Protection Organization (EPPO) has prepared a poster and leaflet in order to raise public awareness about the risks of moving plants and their associated pests during international travel and to encourage responsible behaviour.
http://www.eppo.int/PUBLICATIONS/poster/EPPO_POSTERA3.pdf
http://www.eppo.int/PUBLICATIONS/poster/EPPO_leaflet.pdf
One such hiker is the red palm weevil (Rhynchophorus ferrugineus)
http://www.jungledragon.com/specie/661/rhynchophorus_ferrugineus.html
Update: some recent info from RMFelix about the situation in Portugal.
This species has literally "cut" all Phoenix canarensis in portuguese territory. For the last 5-10 years the best fitossanitary treatment was simply to cut this exotic tree. Probably the beetle entered in south of portugal, where the first symptoms were first noticed. Today, from north to south, its very difficult to spot one Phoenix canarensis that isn't infected. Chemical and pheromone treatments are in most cases non efective. The quick answer to this problem was to eliminate the host plant. A few years from this part in all major cities the host plant was removed. In fact the beetle is still here, now struggling for survival ;) Just for curiosity, last year I've found in one tree that was cut 7 years ago (in my backyard) two full grown larvae! The resilience of this beetle is simply impressive.
The Common Water Hyacinth (Eichhornia crassipes) is a floating aquatic plant originating from South America sold for ornamental purposes. The plant is recognized as one of the most invasive alien plants in the world. It has huge detrimental economic impacts: it is a threat to agriculture, plant health, environment, public safety, recreation activities, water quality and quantity and human health.
http://www.issg.org/database/species/ecology.asp?si=70
http://onlinelibrary.wiley.com/doi/10.1111/j.1365-2338.2008.01261.x/pdf
http://plants.ifas.ufl.edu/node/141
The Butterfly Bush (Buddleja davidii) is a multi-stemmed shrub or small-tree that is native to China and has been introduced as an ornamental world-wide.
Ecological Impacts: It has been planted in landscapes to attract butterflies, bees, moths and birds. It can escape from plantings and become invasive in a variety of habitats such as surface mined lands, coastal forest edges, roadsides, abandoned railroads, rural dumps, stream and river banks to displace native plants.
http://www.cabi.org/isc/?compid=5&dsid=10314&loadmodule=datasheet&page=481&site=144
http://www.na.fs.fed.us/fhp/invasive_plants/weeds/butterfly_bush.pdf
http://www.evergreen.ca/docs/res/invasives/Invasive-Plant-Profile-Butterfly-Bush.pdf
Impact: May cause the decline or extinction of native ladybird species. May cause a reduction in biodiversity as the Harlequin Ladybird is known to compete directly with other invertebrates for resources and by predation on small invertebrates including ladybirds, eggs and larvae of butterflies and moths and on aphids and other scale insects. They are an indirect pest of orchard crops which can affect the fruit quality and they can affect the taste of wine as they are difficult to remove from the clusters of grapes prior to harvest. In autumn/winter they tend to swarm and form large aggregations in buildings and are considered a nuisance.
http://www.cabi.org/isc/?compid=5&dsid=26515&page=481&site=144
http://invasives.biodiversityireland.ie/speciesalert-harlequin/
A survey has been organised in the UK to monitor it's spread.
http://www.harlequin-survey.org/
The brown trout is an originally European species of salmonid fish.
As Travis explained, they are quite a popular game fish in North America. They have been introduced into just about every major cold/cool watershed where trout live. They are hardier than many of the native trout and adapt very well. In many systems they have destroyed the native species. They are far superior in every way when compared to the native brook, rainbow and cutthroat trout. But there are many programs that are working to return these systems back to their once natural states, which include removal of invasives. It is a long, slow process, and sometimes not worth it, but other times it is!
Another species, mentioned by Greame, is the cane toad.
The cane toad, also known as the giant neotropical toad or marine toad, is a large, terrestrial true toad which is native to Central and South America, but has been introduced to various islands throughout Oceania and the Caribbean as well as northern Australia.
I just watched a documentary by Martin Clunes - Lemurs of Madagascar. He went looking for a gentle lemur - an endangered species in lake Alaotra. Reed, which is the lemur's habitat and food was being burnt out to create rice fields. An Asian snakehead, a species of predator fish has been introduced in the rice fields. Along with excessive fishing, it is the cause for the loss of many of the native endemic species.
http://www.wildlifeextra.com/go/news/madagascar-snakeheads.html
http://www.iucnffsg.org/about-ffsg-2/ffsg-regions/madagascar/ Replied 5 years ago, modified 5 years ago
This also is an invasive species in many countries. Here in South Africa there are a huge amount of invasive plants and there have been massive attempts to eradicate them.
Perhaps these should be on a list..or is there one already? Replied 5 years ago
http://midmichigannatureandscience.blogspot.com/2013/05/a-tale-of-two-flowers-one-native-one.html Replied 5 years ago, modified 5 years ago
A small flower in the geranium family, this annual flower has been introduced to much of North America from the Mediterranean Basin and grows quite well in dry, high desert climates. This specimen was captured near Fort Smith, Montana.
http://www.issg.org/database/species/ecology.asp?si=518&fr=1&sts=&lang=EN Replied 5 years ago
http://myfwc.com/wildlifehabitats/nonnatives/ Replied 5 years ago
I'll have to get a photo of giant hogweed (a land invasive) - just because it's size can be quite impressive out here (flowers the size of umbrellas) Replied 5 years ago
http://www.invadingspecies.com/invaders/plants-terrestrial/himalayan-balsam/
http://www.cabi.org/uploads/projectsdb/documents/1352/himalayan%20balsam_lr.pdf Replied 5 years ago
Kudzu is widely believed to drastically reduce biodiversity because of its ability to smother other vegetation and develop large-scale monocultures. It can climb overtop and subsequently kill new seedlings or mature trees. Forestry problems associated with aggressive vines such as kudzu include mortality of edge trees, exclusion of native plant species, and potential to increase fire hazard during winter.
http://www.issg.org/database/species/ecology.asp?si=81
http://www.nps.gov/plants/alien/pubs/midatlantic/pumol.htm
http://www.invasivespeciesinfo.gov/plants/kudzu.shtml Replied 4 years ago
The Burmese pythons, released by pet owners, are multiplying like there is no tomorrow. Origianally first sighted in the 1980's there is no telling how many there now are. Some estimates are that there could be in excess of 300,000. WOW!
Replied 4 years ago, modified 4 years ago
Despite it's invasive spread, this species' status is considered vulnerable.
http://www.ecoblog.co.za/environmental/alien-jacaranda-tree-invades-south-african-soil/
http://www.invasives.org.za/invasive-species/item/265-jacarandajacaranda-mimosifolia.html
http://keys.lucidcentral.org/keys/v3/eafrinet/weeds/key/weeds/Media/Html/Jacaranda_mimosifolia_%28Jacaranda%29.htm
http://www.iucnredlist.org/details/32027/0 Replied 4 years ago, modified 4 years ago
The European Paper wasp - it's a relative newcomer to North America, (was unknown here until the 1980's) and at this point it's impacts on native paper wasps aren't entirely clear. Replied 4 years ago
http://scenicsouth.co.za/2014/03/invasive-wasps-european-paper-wasp-and-german-wasp-or-yellow-jacket-help-the-city-monitor-their-spread/
http://www.ispot.org.za/European%20Wasp%20Alert Replied 4 years ago
In Iceland, the plant has been used to combat erosion. In some places, however, this has caused problems because of the lupin spreading too quickly. It is not native to Iceland but grows very well there. Since other plants find it difficult to root in the loose, eroded soil where it is generally planted, the lupine can grow unhindered and creates monocultures which prevent native flora to flourish. Replied 4 years ago
This species has been nominated as among 100 of the "World's Worst" invaders.
http://www.issg.org/database/species/ecology.asp?si=65
http://www.europeansquirrelinitiative.org/threat.html Replied 4 years ago, modified 4 years ago
The Red Clover is an introduced species to North America but it is not considered invasive. Not all introduced species have bad outcome for the native environment. Replied 4 years ago, modified 4 years ago
"Dead Man's Fingers" I'm slightly unclear about whether this is an invasive in our intertidal zones out here in the west, but it is on the eastern coast of the US Replied 4 years ago, modified 4 years ago
C. fragile ssp. tomentosoides has spread throughout the northern and southern hemispheres including the northeastern and northwestern Atlantic, the Mediterranean, Australia, New Zealand, the eastern central Pacific, and southeastern Pacific. In east Asia (Japan and Korea), where Codium fragile is a native species, its spread is restricted to areas where water temperatures are between 10-20°C (Lee and Kang, 1986; Segawa, 1996). However, when invading new habitats, C. fragile ssp. tomentosoides can withstand temperatures as low as -2°C (Fralick and Mathieson, 1972).
http://www.cabi.org/isc/datasheet/107769
http://www.issg.org/database/species/ecology.asp?si=796 Replied 4 years ago
I just found that it *is* considered to be introduced and invasive to California, so I'm guessing that it is here too. Perhaps it has not yet begun to present the problems that other places have with it yet. It is also possible that we do not have the subspecies "tomentosoides" which is apparently more problematic. Replied 4 years ago, modified 4 years ago
These little flowers originated in the Mediterranean and have become an invasive in the American West. I can believe that. They were probably the most abundant of the wild flowers I saw on my hike. Replied 4 years ago
Somewhat serious invasive in the USA - one of the bigger problems is that it spreads rather quickly and is very difficult to eradicate once it is established. Replied 4 years ago, modified 4 years ago
Coltsfoot is native to several locations in Europe and Asia. It is also a common plant in North America and South America where it has been introduced, most likely by settlers as a medicinal item. The plant is often found in waste and disturbed places and along roadsides and paths. In some areas it is considered an invasive species.
http://www.fs.fed.us/database/feis/plants/forb/tusfar/all.html#Impacts
http://www.invasive.org/browse/subinfo.cfm?sub=6564
http://www.issg.org/database/species/ecology.asp?si=426 Replied 4 years ago, modified 4 years ago
Another pretty little pink flower that is outta control :p - These little geraniums simply do too well in our Pacific Maratime climate. Replied 4 years ago
The cranefly known as the European cranefly in the Pacific Northwest, Tipula paludosa Meigan, is an introduced exotic pest first found in the region in 1965 in British Columbia, Canada. Since then, it has gradually spread into Washington State and parts of Western Oregon and has become the most serious economic pest of lawns, pastures and hayfields in the northwest. Replied 4 years ago
Emerald ash borer, Agrilus planipennis, is an invasive borer from northeast Asia threatening North American and European ash trees (Fraxinus spp.).
http://www.cabi.org/isc/datasheet/3780
http://www.invasive.org/browse/subinfo.cfm?sub=7171
http://www.invasivespeciesinfo.gov/animals/eab.shtml
http://www.emeraldashborer.info/documents/russia/Ashes_in_Europe_are_in_danger.pdf Replied 4 years ago
The Eastern Gray Squirrel is native to North America, but is considered an invasive species in the UK, and a threat to the native Red Squirrel populations.
http://www.telegraph.co.uk/news/earth/wildlife/10705527/History-of-grey-squirrels-in-UK.html Replied 4 years ago
In Karnataka, India, almost all the national parks are overrun by Lantana camera. It is constantly referred to as an invasive species, but when probing into when and how it arrived I was shocked... It was thought to arrive around 1800 (give or take, it is debated via the British using it as an ornamental shrub). So... 200+ years later, it is still considered an 'invasive' species.... :/ I posed the question to a botanist working on species changes in Bandipur National Park. After much discussion, he said that in fact, there are no scientific rules as to what distinguishes an invasive or native species... there is no time-limit, only our perceptions. A species that nearly appeared in a location is definitely native, all others are invasive?. In the case of Lantana, i will completely agree it is an aggressive species, and has killed off a lot of the native grass species, but after 200+ years of growing in the wild, I personally do not characterise it as 'foreign' but 'indigenous'. it has been here so long, that it has integrated into the ecosystem, with the sambar deer having evolved to eat the bush, and it provides berries for a lot of birds too!
Joe (above) mentioned the Gray squirrel in the UK.... For me, i grew up seeing these squirrels, and the red squirrel being exceptional rare. For me the Gray squirrel is not an invasive species anymore, but an aggressive native species.
I'm sure there are thousands (if not millions) of examples, especially if you consider insects, so why are we drawing lines in the sand? Does it matter 'how' a species finds a new habitat (the negative role of humans is a debate for another thread). They are here, we can't change that now, all we can do is let biodiversity do what it does best... evolve.
This is just my opinion, but as soon as any species lives in the 'wild' (outside of zoos or a captive environment), it is not invasive, just new. I have the same beliefs with immigration laws too! :)
Replied 4 years ago
Now imagine, just for a thought experiment, that humans had not introduced rabbits to Australia, but that the rabbits had used us to get there (like trees making fruit for that birds will scatter their seeds)... Would you still consider them invasive in this case? I find it interesting to consider... because if the only reason for calling a species invasive is that humans have introduced it, we are holding ourselves in a 'god like' self-esteem. We are part of nature too, albeit not a great one to share a planet with. Just like the bird spreading the seeds of plants, we spread species too. Please forgive me, i am playing devils advocate a little here! :)
Humans have screwed so many eco-system both deliberately and accidentally. What i don't understand now, is why we think that we can save them... We can't, we are not smart enough, it is impossible to conceive. What we can do, is give nature the chance to sort it's self, as it will. I don't believe in species conservation, but I do believe in conserving biodiversity and conserving the ability of nature to do its thing. :)
I think I am getting off-topic.... I'm procrastinating at work, and enjoy these kind of philosophical arguments! :) Replied 4 years ago
My interpretation of 'invasive' is the combination of 2 things:
a) An unnatural or unlikely introduction
b) In a way that is destructive to the existing eco system
With unlikely introduction I mean that under normal circumstances, the invasive species would never end up in the new eco system. We can debate what 'natural' means and count ourselves and everything we do as natural, but then we're just having a semantic discussion. Perhaps we can describe unnatural as not biological.
When people in the Netherlands release a tropical fish into fresh water ponds, that is not a biological introduction. Not in any biological circumstance could that species have ended up in closed waters in a cold climate on the other end of the world. It's physically impossible.
Even when we as people were still 'natural', nobody could have physically transported this fish and keep it alive this way. It is solely made possible by automated machines of transport, which are not natural in any way, at least by my definition :)
The 2nd part of my interpretation is whether it matters. I believe the intention of the word 'invasive' is to indicate indeed that it is destructive. Nobody would care if the new species would neatly fit in. Invasive species usually don't fit in. In the example of the tropical fish, it kills every single living thing in the pond as none of the species have evolved any defense system for this species not belonging here.
Another example is the Rose-ringed parakeet, the only tropical bird in the Netherlands. It doesn't belong here but somehow managed to survive. However, it does no harm nor does it destroy an eco system, so I would consider it "introduced", yet not invasive.
Such events are not only caused by humans, but probably most of them are. At what point does an invasive species become native? I don't have an answer to that, other than some considerations:
First of all, an invasive species can destroy large parts of an eco system within a single generation. Next, the invasive species comes out as victor and the losers go extinct. We wait a few generations, and at one point we consider the invasive species to be the new default. That would certainly reflect the reality of things, but this looks past the observation that it never should have happened in the first place. The invasive species becoming native had a high price.
Second, you make it sounds like 200 years is a long time. Biologically it isn't, it's just a few generation whilst nature often needs many more to evolve an answer to changes. Expecting those changes to be relatively gradual, not sudden.
Anyway, those are my thoughts on the definition. Replied 4 years ago, modified 4 years ago
I have no problem with anybody else defining "invasive" differently than I do.
Personally, I'd remove condition A from Ferdy's definition. If "Species A" comes to an area previously populated by "Species B" (and not "A"), and because of something "A" does, "B" starts dying out in that region, then "A" is invasive in that region. As soon as "A" starts reproducing in the area, I would also consider it endemic, but that wouldn't make it non-invasive (it's still relatively new to the region, and still doing harm to species that were there first).
If I were the one defining what is invasive and what isn't, then I'd say (based on my limited knowledge)...
In North America: The Gray Squirrel is indigenous, native, non-invasive
In the (most of the) Southern UK: The Gray Squirrel is native, non-invasive
In the (most of the) Northern UK: The Gray Squirrel is native in some areas, encroaching into others, and invasive
I don't think invasive is necessarily bad (except for the short term effect on the species hurt by their introduction), and think it's unfortunate that invasive sounds so negative. There is a huge range on how negative (or positive) an invasive species can be when looking at the bigger picture.
In the worst case, an invasive species wipes out several other pre-existing species in a region, and leaves no room for any other species to grow, reducing biodiversity in the region for centuries or more.
In the best case, an invasive species only thins out another species, and by doing so helps the prey of that other species flourish, introducing better ecosystems for even more species, effectively increasing biodiversity in the long run. Replied 4 years ago
Invasive species - a species that causes harm or destruction to the ecosystem and it's native inhabitants
Non-native species - a species that is introduced to a region, intentionally or unintentionally
Endemic - a species that is native and restricted to an region
Given these definitions, a species may be introduced to a region and not be invasive. In fact, statistics show (at the time of my course) that only 1 in 10 introduced non-native species become invasive. The other 9 may remain in their new ecosystem and either get along with pretty much all other species, or die out.
The way I see it, a non-native species that is introduced to a region will always be just that, non-native. That doesn't mean that it won't become established and reproduce and become a part of the ecosystem. It just means that it will never be native, because it did not originate in its introduced range. Take for example the common pheasant Phasianus colchicus, known in North American as the ring-necked pheasant. The bird was introduced to North America in the late 19th century as a game bird with the intent of providing table fare. Throughout the continent, it is not considered to be invasive. Sure, it eats grains and grass seed and insects like some of the natives (turkeys, song-birds) but it doesn't out-compete the natives for these resources. In fact, in some regions, pheasant numbers are too low to keep hunters happy.
Now, an example of a non-native that became invasive. Asian carp were brought to the southern United States several decades ago by aquaculturists to keep their rearing ponds a little cleaner. The carp (including bighead carp Hypophthalmichthys nobilis, silver carp H. molitrix) are filter feeders and filter out plankton in the water, and are quite effective at it. During flood events, these carp escaped from aquaculture settings and eventually moved into the Mississippi River system, where they started altering the ecosystem by filtering out plankton in the water. The place hit the hardest is the Illinois River. From its beginning in Chicago, to its confluence with the Mississippi River, the Illinois River is full of bighead and silver carp, and almost no other aquatic species. When the carp filter out the plankton in the water, juvenile fish of other species have nothing to eat, and eventually die out. When this happens, many of the larger and mature fish that are piscivorous (meaning they eat other fish) have nothing to eat and eventually start dying out. This then trickles into the terrestrial ecosystem, including birds and reptiles and mammals that eat the fish. Textile non-native species that was intentionally brought to North America, accidentally released into the wild, and became invasive.
As for Joe's grey squirrel example, this is a good example of how a species can be introduced while hitch-hiking in it's own country. The eastern grey squirrel is indeed native to eastern NA. By hitching a ride with humans through western expansion, they were introduced outside of their native range throughout much of the continent. In some areas in the west, they out compete native red squirrels and douglas squirrels. So, one species on one continent, depending on where they are found, are native, non-native, and even invasive. Replied 4 years ago
These guys didn't travel far. They came over to the West part of the US from the East, but they tend to out compete and eat our smaller native species out here. They apparently arrived through the pet trade and with trout stocking. Replied 4 years ago, modified one year ago
Iris pseudacorus is a perennial monocot forb that forms dense stands of robust plants. It thrives in temperate climates and can grow in water up to 25cm deep. It is a fast-growing and fast-spreading invasive plant that can out-compete other wetland plants, forming almost impenetrable thickets. Iris pseudacorus is poisonous to grazing animals and caution should be used if pulling out this plant as it causes skin irritations. It has typically been introduced as an ornamental, but has also been used in erosion control and for making dyes and fibre.
Yellow flag is non-native in the U.S., and is spreading throughout the country.
Iris pseudacorusis a wetland plant that is especially showy during its short blooming period. This good-looking plant has been transplanted into well-watered gardens all over the world and has widely escaped; it is also used in sewage treatment, and is known to be able to remove metals from wastewaters. Like cat-tails, yellow iris colonizes into large numbers, forming very dense monotypic stands, outcompeting other plants.
http://www.issg.org/database/species/ecology.asp?si=873&;
http://plants.ifas.ufl.edu/node/205
http://plants.usda.gov/core/profile?symbol=IRPS Replied 4 years ago, modified 4 years ago
i'll let you know how it goes! :) Replied 3 years ago
Replied 3 years ago
It has also been released in Australia
http://www.redleafenviro.com.au/news/chinese-stripe-necked-turtle-found-in-the-toowoomba-waterbird-habitat.aspx Replied 3 years ago, modified 3 years ago
Some invaders are pretty though.
The box tree moth, Cydalima perspectalis, is native to East Asia (Inoue et al., 1982). It was first recorded in Europe in 2007, in southwest Germany and the Netherlands (Krüger, 2008; Straten and Muus, 2010). Since then it has been recorded in many other European countries, and climate models predict further spread of the species in Europe, invading most areas except for Northern Fenno-Scandinavia, Northern Scotland and high mountain regions (Nacambo et al., 2014). In the newly invaded regions, C. perspectalis larvae feed on the leaves of box trees, Buxus spp., resulting in defoliation, which can kill the trees. The most significant damage, however, can be from the larvae attacking the bark of box trees causing the trees to dry out and die. Besides cultural and economic effects, the most serious threat from C. perspectalis is on the natural Buxus populations (Kenis et al., 2013). The species is easily introduced accidentally with its host plant, which is extensively traded over Europe and therefore presents a serious threat (Leuthardt et al., 2010; Straten and Muus, 2010).
http://www.cabi.org/isc/datasheet/118433 Replied 3 years ago
The giant African snail Lissachatina fulica (former Achatina fulica) is listed as one of the 100 of the World's Worst Invasive Alien Species.
http://www.iucngisd.org/gisd/species.php?sc=64
http://www.cabi.org/isc/datasheet/2640
http://www.snail-world.com/african-giant-snail/
http://www.molluscabase.org/aphia.php?p=taxdetails&id=881469 Replied one year ago, modified one year ago
It might be nice to have a list of species on JD that are considered invasive (pests) in their non-native ranges, but it would be easier if it could be set up as an collaborative effort.
As an alternative for a (collaborative) list we might agree on some "standard tag" to indicate that the species depicted is considered "problematic" or some such, but this may not be as straightforward as one might hope.
Some terms for tagging could possibly be:
Invasive (=problematic)
Introduced (=not necessarily problematic)
Cosmopolitan (=has been around everywhere forever, even if not native)
Together with tagging of a list we could then make an effort to update species info pages with a section on the perceived "invasiveness" so that this info is easily found by going from the photo to the species pages.
Just brainstorming a little here ...
For anyone interested: A few Dutch nature/wildlife conservation organizations issue a newsletter ("Kijk op exoten") specifically on invasive species. It is in Dutch but some of you may find it interesting nevertheless, if not for anything else just as a record of what is recorder from the Netherlands:
https://waarneming.nl/kijkopexoten.php
Also, waarneming.nl has special "portal" pages for this topic:
https://waarneming.nl/invasive_alert_view.php
https://waarneming.nl/waarnemingen_exoten.php
Cheers, Arp Replied one year ago
There is one tag 90invasive species but it was added to only a few of the photos listed here. This is easy to fix but someone has to know about it and add it. Maybe Ferdy can come up with some ideas but he has a long "to do" list already. Replied one year ago
> but it was added to only a few of the photos listed here
not anymore ... 90invasive species ;o)
We have a number of other related tags ...
18pest 6Invasive plant 5invasive plants 13invasive
Maybe also see https://www.jungledragon.com/forum/23/elite/767/uniform_tagging.html
And not all images we have of the species/images tagged now are also tagged "invasive species", but maybe we don't necessarily _want_ that, but just have a few representative images of each species tagged as such ...
18Nezara viridula 114Harmonia axyridis
Replied one year ago, modified one year ago
Stephanitis takeyai: Little Lacebug originating from Japann and invasive in EU and USA
Corythucha ciliata: A "New World" Lacebug invasive in Europe
Nezara viridula: Believed to have originated in Ethiopia, now almost cosmopolitan
Vespa velutina: Asian Hornet currently invading large parts of Europe
Replied one year ago, modified one year ago
The Asian longhorn beetle Anoplophora glabripennis is a large wood-boring beetle that is native to countries in Asia, such as Japan, Korea and China. It is one of the most dangerous pests affecting broadleaf trees in the world. The beetle spends most of its life within the inner wood of a variety of hardwood trees as larvae which tunnel and feed on the cambium layer, eventually killing the tree. It was first detected in New York 1996, although it is thought to have arrived in the 1980s in solid wood packing material from China. During the last decade, as trade flows increased heavily between China and many western countries, the importation of large amounts of untreated or inappropriately treated wood packing material containing living larval stages of pests, led to multiple accidental introductions of A. glabripennis in North America and in Europe.
In North America and Europe, this quarantine pest is subject to eradication: each infested area is monitored periodically to identify newly attacked trees, which are cut and incinerated without delay. Beginning the first year of detection of the infestations in North America and Europe, great eradication efforts were implemented in each infested site. However, a few A. glabripennis adults and variable numbers of newly infested trees were discovered each year in most sites, even where the initial size of the infestation was limited. This means that eradication is not an easy process; it requires heavy and constant efforts of monitoring and tree cutting and destruction over several years. However, eradication is possible as it seems to have been achieved in Chicago (US).
https://www.cabi.org/isc/datasheet/5557
https://www.eppo.int/QUARANTINE/special_topics/anoplophora_glabripennis/ANOLGL_IT.htm
https://www.waldwissen.net/waldwirtschaft/schaden/invasive/wsl_merkblatt_laubholzbock/index_EN
https://www.invasivespeciesinfo.gov/animals/asianbeetle.shtml
http://www.iucngisd.org/gisd/species.php?sc=111
http://www.padil.gov.au/pests-and-diseases/pest/main/135635# Replied one year ago