Dear Editor:
The column Argument Falls Short (May 14) by Todd Major contains incorrect assumptions about the need to control invasive species. Non-native plants and invasive species are not the same thing. Only a few of the nonnative plants in B.C. are a concern and considered invasive in specific areas. In their native location, plants are usually part of an ecosystem with naturally occurring predators, insects and diseases. When a plant or species is moved from its native location without those natural predators, the population can explode.
B.C. has many successes in preventing the introduction of invasive species. Where prevention wasn't enough, the next step is to immediately address and remove new species before they become established. We need to get on top of invasive plants now and effectively control them before we no longer can. Of course many invasive plants have some popular characteristics, but they can cause major problems with infrastructure, foundations, etc. For example, knotweed looks nice and green but has an extensive root system and is very difficult to remove once established. It would be far easier to have planted a less aggressive, non-invasive plant.
Through provincewide co-operation and co-ordination, the Invasive Species Council of BC is working to minimize the negative ecological, social and economic impacts caused by the introduction, establishment and spread of invasive species. We continue to work with the horticulture industry to find suitable plants to replace known invasives through our PlantWise program. ISCBC has a wealth of resources available for the public, industry, governments and educators through the PlantWise program and on its website at bcinvasives. Wise gardeners should know what they are planting, plant the right plant and plant it in the right place.
Even for bees and other pollinators, invasive plants that have overcome an area can rapidly drop food diversity, change the structure of the ecosystem and lure pollinators away from remaining native plants. It is better to provide pollinators and other flora with a garden planted with a strong mix of native and ornamental plants that are not invasive. Being PlantWise is an excellent way to ensure the health of gardens, municipal parks and agricultural areas.
Gail Wallin executive director ISCBC
Williams Lake
