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HERBICIDES FOR INVASIVE PLANTS
Florida brought in Old World climbing fern as an ornamental; the vine later smothered more than 100,000 acres and can carry ground fires into tree canopiesOnce admired for its ornamental beauty, the old world climbing fern has now wreaked havoc on Florida's ecosystems. This invasive plant grow...- In the late 1800s, America imported Japanese hops for medicine and gardens; escaped vines can now form 4-foot-thick blankets with thousands of plants per acreIntroduced to the United States in the late 1800s, Japanese hops were initially valued for their ornamental and medicinal qualities. Howeve...
- Before 1850, Americans grew Dyer’s woad for blue dye; in the Great Basin, one infestation later grew from 12,000 to 150,000 acres in eight yearsDyer's woad, once used for blue dye, has become an invasive species in the American West. This plant produces a high number of seeds and th...
- Connecticut began clearing an invasive reed from Highstead Pond in 2012; 98% was killed, and by 2017 native plant richness around the pond had increased 39%Highstead Preserve embarked on an ambitious multi-year project aimed at controlling the invasive common reed to foster the growth of native...
- America brought yellow flag iris in for gardens; it escaped into wetlands, reached more than 40 states, and now congests water flow while crowding out native plantsThe yellow flag iris, first brought to North America in the 1800s, quickly evolved from an ornamental plant to a widespread ecological thre...
- Researchers removed invasive Japanese stiltgrass from 8 Indiana forest sites; native plant diversity rose 24%, while herbicide-treated plots had 123% greater tree seedling density than controlsThe spread of Japanese stiltgrass across eastern forests poses a significant threat to the diversity of native plants. Research indicates t...
- In 1921, America introduced cogongrass as a forage crop; later used for soil control, the invasive grass now covers more than 1 million acres in FloridaCogongrass was brought to the United States in the early 20th century with the noble goal of supporting agriculture and curbing erosion. Ho...
- San Francisco Bay cut invasive cordgrass by more than 97%; native Ridgway’s rails later expanded into restored former salt ponds as marsh habitat returnedIn a promising turn of events, restoration efforts in San Francisco Bay have notably decreased invasive cordgrass numbers, allowing the Rid...
- San Francisco Bay cut invasive cordgrass by nearly 98%; native Ridgway’s rails then expanded into 4 former salt ponds as restored marsh habitat returnedThe San Francisco Bay has seen remarkable advancements in wetland restoration, benefiting the Ridgway's rail population significantly. Whil...
- In 1991, scientists used red dye to trace weedkiller in a Washington river choked by milfoil; the study reported a 99% decline in milfoil and up to 1,000% more native plantsResearchers used a red dye to precisely track herbicide application in Washington's Pend Oreille River. This innovative method allowed for ...
- In 2023, North Carolina's Catawba Lands Conservancy took on 80 acres damaged by erosion and invasive plants. 3 years later, the project aims to bring 1,000 people into restoration nearbyCatawba Lands Conservancy is restoring eighty acres within Mountain Creek Park. This project addresses soil erosion and invasive plant spec...
- In the 1830s, America imported autumn olives from eastern Asia to stop erosion and reclaim mines; now the plant infests much of the United StatesAutumn olive, introduced from Asia, was used for erosion control and land restoration. This shrub's nitrogen-fixing ability and rapid growt...
- In 2009, Montana's Big Hole staff began monitoring an invasive plant threatening native habitat. 17 years later, spotted knapweed estimates stood at just 8% of its 2012 peak, showing strong controlLong-term monitoring and control efforts have significantly reduced spotted knapweed at Big Hole National Battlefield in Montana. Monitorin...
- In 2009, Great Lakes IPMT helped restore 1 invaded panne at Indiana Dunes. 17 years later, native flowers now bloom in the wetland where invasive plants once formed a dense monocultureIndiana Dunes National Park faced a challenge as invasive plants colonized its delicate panne ecosystem. A dedicated partnership was formed...
- America introduced Chinese Privet as an ornamental plant in 1852. It later spread across millions of acres of forestFirst spotted in 1852, Chinese privet has spread relentlessly across the American Southeast, wreaking havoc on local ecosystems. This invas...
- In 2001, USDA researchers released salvinia weevils in Texas and Louisiana; by 2003, weed cover had fallen near release sites while untreated controls stayed chokedA tiny weevil has proven to be a powerful ally in the battle against giant salvinia, an invasive aquatic weed. Tested in Texas and Louisian...
- Invasive tree of heaven is helping spotted lanternflies spread across US by feeding them its toxic sap; here’s why scientists are using it as a trapThe tree of heaven, an invasive species, facilitates the spread of the spotted lanternfly by providing an abundant source of plant sap. To ...
- In 1772, Benjamin Franklin sent Chinese tallow seeds to Savannah, Georgia; the government planted more along the Gulf in 1900, and the tree now covers 185,000 hectaresIn the late 1700s, a shipment of 1772 seeds sparked a significant invasion of non-native trees across southern U.S. forests. The federal pl...
- After someone planted golden bamboo beside an Oʻahu road, the single ornamental planting escaped and grew into a 1-acre patch, crowding out native plantsGolden bamboo, once a beloved addition to gardens, is now recognized as an invasive menace. Its rapid growth through underground rhizomes t...
- Since 1997, Florida has released Australian insects to help control melaleuca in the Everglades; its invaded range has shrunk by nearly 75% alongside herbicide and mechanical removalIn Florida's Everglades, Australian insects played a crucial role in curbing the spread of invasive melaleuca trees. By targeting these tre...
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