It is native to eastern Asia in Japan, China and Korea. In North America and Europe, this species has succeeded in establishing its presence in many countries.
Botanical description
It has hollow stems with high nodes, very similar to the bamboo plant, but it does not belong to the bamboo family.
Japanese Knotweed (Reynoutria japonica) High
It may reach a maximum height of 3 to 4 meters (10-13 ft) in each growing season
, and there are smaller plants than them, much smaller plants in places where they sprout through cracks in houses or in sidewalks in some places
Scientific name:(Reynoutria japonica)
Common name: Japanese Knotweed (Reynoutria japonica)
Its main spread is in Japan and it is used as food in Japan
It forms dense colonies that drive out other species as it is considered an invasive plant and is now considered one of the worst invasive species in parts of the United States. As a result, Europe Especially in the Netherlands is tolerant of many environmental conditions and disease resistance, as it can be found in a landfill or on the roadside.
Japanese Knotweed (Reynoutria japonica) can be found in 42 out of the 50 states of the United States
How to control japanse Knotweed control method
Cutting Japanese Knotweed (Reynoutria japonica) does not help control, but it can increase the risk of the plant becoming more present, as it helps to spread the roots and strengthen the plant.
- The first step must be chemical control for a long time with mowing to keep the plant from growing again and the plant does not spread in the house or garden and the plant reproduces again
- The second step is to use a weed killer, and the best thing is to use Glyphosate, not to make sure that it does not come into contact with your own plants if you are growing plants such as bamboo.
- The third step is to make holes for the roots of the plant three meters deep, and then sift the soil well
- The fourth step is to cover the infected places with a special black plastic sheet that can be found in gardening shops to prevent multiplication and the emergence of germination again.
- Step 5 Get rid of the stems and residue of Japanese Knotweed (Reynoutria japonica) with an approved pest control company to prevent this plant from appearing again.
Damage caused by Japanese Knotweed (Reynoutria japonica)
Japanese Knotweed (Reynoutria japonica) can cause severe damage to foundations, sidewalks, infrastructure, sewers and drainpipes.
The upper part of the (roots) is remarkably soft and flexible, and it can greatly harm concrete and buildings, and it may also block the sewers, which causes a major problem in the drainage pipes.
Japanese Knotweed (Reynoutria japonica) can cause many accidents on the roads as a result of it obscures the vision of drivers, which costs either homeowners or the competent authorities more money to try to prevent the plant from growing again.
Japanese Knotweed (Reynoutria japonica) leads to many financial and ecological costs and losses for farms and forests.
Biodiversity Japanese Knotweed (Reynoutria japonica) could make many of the original varieties in the region disappear as a result of it being one of the most powerful food varieties in the world, especially Europe, the United States and Japan