‫ە‬A Case of Utilizing Results

Designated invasive alien species, lanceleafcoreopsis (Coreopsis lanceolata) removal
and control manualMATSUE Masahiko, Head OGURI Hitomi, Senior Researcher
HATASE Yoriko, Visiting Researcher
Landscape and Ecology Division, Environment Department(Key words) Designated invasive alien species, lanceleaf coreopsis (Coreopsis lanceolata), removal 
2. Outline of the Lanceleaf Coreopsis Removal andControl Manual
To consider a control method, it is necessary to set
achievable goals based on a clear understanding ofpresent circumstances. To do so, it is important todecide what kinds of vegetation to aim for after
exterminating the lanceleaf coreopsis. After this goalhas been set, a management method adapted toachieve it is selected and implemented at the site.
Then it is important to clarify effectiveness throughmonitoring, and when it is impossible to confirm
sufficient effectiveness, the goal and method must berevised.
Figure 1 is the removal and control flow chart. The
manual presents the goal setting concept, management
method and its effectiveness, method of selecting thecontrol method according to the goal, method ofperforming
themanagement
work,andimplementation precautions. As stated above,lanceleaf coreopsis possesses powerful resilience,
requiring years of continued control until it iscompletely exterminated. And measures are necessary
to prevent it from returning after it has been removed.
The manual is counted on to support measures todefeat the lanceleaf coreopsis in the field.

Preventing invasion

Transitioning to a high grassplain or to trees
Change-over to artificial planting

Selective uprooting(Manually uprooting)
Mowing (mechanicalmowing)
Chemical control(Herbicide, vegetation
control agents, etc.)
Ecological control(Accelerating transition)

Evaluating results

Recreating past vegetation

Reducing impact (restrictingpopulation)
Eradication (exterminating thepopulation)

Selecting management method

Lanceleaf coreopsis
management goals

Photo 1. Floweringlanceleaf coreopsis (top)and fallen seeds (bottom)

Preventing spreading (preventingblooming/fructification)

Image of targetvegetation

Clarifying present stateSetting goals

Managing/monitoring
1. Background to the preparation of the manual
Lanceleaf coreopsis (Coreopsis lanceolata) was
designated an invasive alien species in February 2006,
placing restrictions on its cultivation, storage,transport, import, etc., and requiring that it beexterminated whenever considered necessary.
Attempts are being made to exterminate it from riversand roads with the cooperation of residents, but
lanceleaf coreopsis (Photo 1), a perennial herb of thecomposite family originating in North America, isextremely fertile. Many seeds are fructified and fall to
the ground where large numbers of the seeds sprout. It
is plant with a powerful constitution; any whichsurvive control activities quickly recover. For thesereasons, the effects of control efforts are insufficient.
Very little research on lanceleaf coreopsis has been
done in Japan, so it is necessary to collect more
information to develop effective methods of controllingit.
Since 2006, three methods, uprooting, cutting, andtopsoil removal, have been used for a vegetation
control experiment in Kasada Park at the government
operated Kisosansen Park Center, verifying the control
method and its effectiveness. The Removal andControl Manual was prepared based on knowledge
obtained as a result of this experiment.

Removing bytransforming theenvironmentͤ ۵= Object of management experiment

Figure 1. Setting Lanceleaf Coreopsis Management Goals and Management Methods