Right Plant! Right Place!. http://wildcraftedmedia.com/oregon_grape.html. King County Noxious Weed Control Program. What is a Native Plant?. A plant that grew, lived, or evolved in a particular place over time. or…
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King County Noxious Weed Control Program
A plant that grew, lived, or evolved in a particular place over time.
A plant that was growing here before humans introduced other plants from distant places.
A plant growing where it wants to, not where it was planted.
A plant that takes water, food, or habitat from desired plants.
Sometimes weeds can be useful in one place and harmful in another.
Like blackberry brambles!
All over the world!
Seeds get carried on clothing…
Some are escaped
Seeds travel as stowaways mixed in bags of feed
Some can’t be sold and others have to be removed to keep them from causing harm.
Can completely take over making them Plant Bullies!
Difficult to control.
Some are poisonous to people and animals by having defenses such as, thorns, poisons, nasty smells and flavors.
Opportunistic – quick to grow into new openings and disturbed places, thus destroying native plant communities.What is a Noxious Weed?
Purple Loosestrife infestation
“Pretty to people, useless for wildlife!”
Start with an ecosystem with lots of biodiversity
It spreads by seed…
A small patch of knapweed becomes a whole meadow…
Knapweed and other invasive weeds have infested millions of acres of wildlife habitat in Washington, Montana, Oregon, Idaho leaving the cupboard bare for large herbivores such as elk, deer, and cattle.
Invasive weeds compete with food crops, decreasing the amount farmers can grow for people and livestock.
Some invasive weeds are poisonous to people and animals.
Horse + tansy = very sick!
Nuisance weeds: Any plant out of place, unwanted where it is growing, difficult to get rid of, with an ability to spread, e.g. dandelions, blackberry bushes.
Invasive weeds: Non-native plants that invade natural areas and grow and reproduce quickly, crowding out native plants and harming natural ecosystems, e.g. scotch broom, knapweed.
Noxious weeds: Non-native, harmful plants that the government is trying to stop from spreading in order to protect farms, natural resources, ecosystems, and people, e.g. garlic mustard, tansy ragwort.
Brazilian elodea infestation