Posts Tagged ‘Galerucella beetles’

Wednesday, July 20, 2022

Controlling an Invasive Plant Without Herbicides

Invasive species are plants, animals, fungi, or microorganisms that spread rapidly and cause harm to other species. They are introduced species that can thrive in areas beyond their natural range of dispersal.

     Characteristically, invasive plant species are adaptable, aggressive, and usually lacking natural enemies that can limit their growth and populations. They have a high reproductive capability; growing rapidly in short life cycles and producing abundant amounts of seed. They aggressively compete with native plants and plant communities and often displace them, thereby disrupting the normal functioning of ecosystems and threatening biodiversity and already endangered native plant species.
     Purple loosestrife is a perfect example of an introduced plant species that has become a serious and widespread threat to native species, natural communities, and ecosystem processes. It was brought to North America by the European colonists as an herbal remedy for dysentery, diarrhea, and other digestive ailments and introduced in the 1800s as an ornamental. It was well-established in New England by the 1830s, and spread along canals and other waterways. Supposedly sterile species were offered for sale for many years, but researchers later found that those cultivars were fully capable of cross-pollinating with plants growing in the wild.


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