Alien species

It is the responsibility of the landowner and plot owner to eradicate alien species from their area.

The maintenance between the plot and the street belongs to the plot owner. 

If you notice alien species in the city-owned area, report your sightings:

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Lupine

Lupine is a perennial pea plant that grows about 1–1,5 meters high. Lupine's inflorescence is tufted and long, and can be blue, purple, pink or white in color. The color of the flower can vary even in the same individual. The leaves are long-stalked and its root system is strongly branched.

Disposing of lupine

• Dig up the seedlings with their roots in early spring, when you see the leaves coming out. Leave the excavated plants to dry in the sun so that they are no longer able to grow. You can finally move the completely dried plants to the garden compost.
• If you can't dig up all the plants at once, dig up the lupine plants at least 4 times during the growing season. This way you prevent the seeds from developing. When seed development is blocked, the plant is unable to reproduce. If the lupine has spread to your lawn, which should have a lean soil for meadow plants, collect the mowed stems of the lupines so that they do not overcrowd the soil.
• The seeds may remain viable for up to 50 years, so raking may cause the seed bank in the ground to germinate. Prune the new seedlings as they appear.

Giant pipe

The plant sap of the giant tuber causes burn-like injuries on human skin when it reacts with sunlight.

You can recognize the giant pipe by its leaves, which are significantly larger than, for example, the domestic thunder pipe or bear pipe. The flower stem can grow up to 4-5 meters high and the inflorescence is white and 40-80 cm wide.

The seeds ripen in autumn and fall during autumn and winter.

Instructions for disposing of the giant pipe 

• Control is easiest in early May, when the plants are still small. The plants can then be controlled mechanically by cutting the main root with a spade from a depth of 10–20 cm.
• By hand weeding, you can remove the seedlings of the first year. The inflorescence must be cut off before the seeds develop.
• The plant can also be covered with black plastic. Mulching kills the leaves and destroys the soil's seed bank.
• Pesticides can also be used, especially in large deposits.

Giant balm

Giant balsam is an annual succulent-stemmed grass with large light or dark red flowers. The plant grows approx. 1,5-3 meters high and makes a home from which the seeds are easily thrown into the surrounding environment. Giant balsam only regenerates from seeds, so it is important to uproot the plant before seeding. Extensive vegetation can also be mowed before flowering. 

 

Instructions for disposal of giant balsam

• Prune the plant as early as possible before flowering and seed ripening.
• The effectiveness of weeding must be verified the following year. If seed-bearing individuals do not develop, the plant usually disappears from the site within a few years.
• In the largest plantations, you can use, for example, scythes or line cutters to help you in the first year. However, a new inflorescence may appear later on the stunted stem.
• When eradicating extensive growths, it is advisable to mow the plants as low as possible. After mowing, it must be ensured that there are no smaller, flowering specimens left.
• Giant balsam sprouts form throughout the summer.
• At the end of summer, during the seed pod stage, it is not recommended to control giant balsam, because the seed pods pop easily and spread the seeds around. However, it is worth trying to carefully cut off the blossoms into a waste bag.
• Plant waste can be packed in waste bags or on a pallet and transported away for final treatment.
• If it is not possible to transport the plant waste away, the giant balsams can be gathered in large piles, where the plants rot and suffocate the lowest ones in the pile and prevent them from taking root again.
• Before the flowers appear, giant balsams can be safely disposed of in compost, for example, but not in open compost, where the stems can possibly re-root and grow new seed-bearing branches.
• It is good to monitor the success of control measures during the growing season and remove new seedlings. The plant can be considered eradicated from the area if no new shoots are found in the third summer.

Deer rose

The kurturus is a perennial shrub that grows from half a meter to one and a half meters. It effectively forms root canals, which can be used to form even large stands.

The leaves of the withered rose are thick and wrinkled and the branches are densely spiky. The spikes are of variable length and straight. The rosettes of the plant are flattened in the middle. The flowers are large, pink or sometimes white. 

Extermination of the deaf rose

• Controlling rose hips requires time and persistence.
• It is easiest to control the plant when the seedlings are still small, when they can be pulled out with their roots. To handle the largest specimens, more robust tools are needed, because the root system must also be dug out of the ground.
• The bush can first be cut off up to the base with, for example, pruning shears, after which the rhizome can be completely dug out of the ground.
• It would be a good idea to collect the rosehips as well, so that the seeds do not spread and, for example, burn them together with the plant waste collected in piles.
• The stems and roots can also be placed on a rock in a place sheltered from the wind and placed on top of, for example, large stones as a weight.
• Plant waste dries up and becomes harmless when the cell dies. Regarding berries, another option is to collect them in a sack and take them to the energy waste collection point.
• Widespread growths should be done by mechanical digging - all control measures, however, also require aftercare and monitoring, as pieces of the rhizome and seeds always remain in the ground. The short-eared rose sensitively continues to grow even from a small piece of root left on the ground.
• The kurturus rose can also be dried or dried. The method is based on cutting off all the new, green leaves of the rose bush.
  • In the first year, it is good to cut the shoots 3–4 times.
  • In the following years, the shoots are always cut after the appearance of new green shoots 2–3 times in the growing season.
  • In a few years, the bush dies completely.
  • The advantage of the method is that even the hard-to-remove rhizomes die completely and eventually only the stems remain, which can be cut or even burned. 

Spanish cirueta

The Spanish snail is usually a large species of brown snail that is found in almost all of Finland. If you have encountered Spanish sedge in the area, you should keep the lawn and yard vegetation short, airy and neat. Piles of leaves and twigs should not be stored in the yard.

Eradication of the Spanish ciruata

• Spanish chip snails should be collected and dropped into either boiling water or a closed container containing vinegar.
• They can also be killed by cutting off their head.
• All destroyed specimens should always be disposed of in a closed bag or container with dry waste so that the dead specimens do not remain as food for their fellow species.
• The collection can be made more efficient by putting moisture-collecting boards on the ground or, for example, jute sacks, under which the snails will search.
• Iron phosphate preparations are also available for control. 

Since the eggs and small individuals of the Spanish beetle spread easily with plant waste, soil and seedlings, their distribution and transfer to new areas must be avoided in order to prevent the spread of the Spanish beetle.