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NOXIOUS WEEDS
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 years- In the 1700s, European teasel reached America, including a type used to finish cloth; today it grows in 43 of 48 lower states, and one plant can make 2,000+ seeds
- 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 Florida
- Siberian elm was widely planted in America for windbreaks and as a disease-tolerant shade tree; it escaped cultivation and is now considered invasive in 41 statesSiberian elm, initially introduced to American landscapes for its Dutch elm disease resistance, soon proved problematic as it became invasi...11 Oct, 2026, 01.40 PM IST
- 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 ...18 Sep, 2026, 06.50 PM IST
- In 1884, Louisiana displayed South American water hyacinth for its lavender flowers; within decades, floating mats covered 126,000 Florida acres and blocked waterwaysOriginating in 1884, water hyacinth transformed into a significant nuisance for Florida by the 1950s. This aggressive floating plant overto...13 Aug, 2026, 04.10 PM IST
- In 2000, California found an aquarium alga choking native seagrass: officials covered every patch with black PVC and chlorinated everything beneath; six years later, it was goneAn invasive seaweed, Caulerpa taxifolia, was discovered in California's Agua Hedionda Lagoon in 2000. Teams of divers used tarps and chlori...01 Aug, 2026, 05.51 PM IST
- Trump issues order to support production of glyphosate: Why has US President’s executive order irked MAHA Moms? All you need to knowPresident Trump has ordered an increase in domestic glyphosate production, citing food security and national defense needs. This move, howe...20 Feb, 2026, 10.23 AM IST
- Solar farms have a superpower beyond clean energySolar farms in the US are being developed to combat climate change and biodiversity loss by incorporating native plants that support pollin...06 Sep, 2024, 10.37 AM IST
- How Accenture makes millions scrubbing Facebook's sordid contentFacebook and Accenture have rarely talked about their arrangement. But their secretive relationship lies at the heart of an effort by the w...01 Sep, 2021, 04.23 PM IST
- SC asks govt to set up agency to handle complaints about sex-selection tests on search enginesIntermediaries must take down with 36 hrs any complaint sent to them by nodal agency; next hearing on February 1717 Nov, 2016, 01.14 AM IST
- Magic of game will take over in Beijing: RoggeDespite the thorny issues of politics, pollution and media freedoms, IOC president Jacques Rogge said on Saturday he has no regrets about h...02 Aug, 2008, 10.32 PM IST
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