by Irene Shonle CSU Extension Gilpin County Why are there some weeds, such as List A noxious weeds myrtle spurge, orange hawkweed, and others, required by state law to be eradicated? The answer is long and complicated. First, we must start with what makes a weed a noxious weed – it is a plant that is alien (not from this country) that has been shown to cause problems in natural or agricultural settings. To be declared noxious, they have to be proven bad actors, and only after scientists have reviewed the data, and it has passed through a legislative process. It is not just “someone’s” opinion. Because these weeds are not from here, they do not deal with the same suite of insects and diseases that our native plants have to deal with, so they have a competitive advantage. They usually have a nasty tendency to form monocultures and crowd out native plants. This is certainly the case with myrtle spurge (and most other noxious weeds); if it is left alone, it will take over large areas
by Irene Shonle CSU Extension Gilpin County Why are there some weeds, such as List A noxious weeds myrtle spurge, orange hawkweed, and others, required by state law to be eradicated? The answer is long and complicated. First, we must start with what makes a weed a noxious weed – it is a plant that is alien (not from this country) that has been shown to cause problems in natural or agricultural settings. To be declared noxious, they have to be proven bad actors, and only after scientists have reviewed the data, and it has passed through a legislative process. It is not just “someone’s” opinion. Because these weeds are not from here, they do not deal with the same suite of insects and diseases that our native plants have to deal with, so they have a competitive advantage. They usually have a nasty tendency to form monocultures and crowd out native plants. This is certainly the case with myrtle spurge (and most other noxious weeds); if it is left alone, it will take over large areas
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