Michigan officials don't expect to wipe out knapweed; the hope is to pare it back.    From Wordnik.com.  [Will Killing This Invasive Plant Harm Bees?] Reference

Researchers in Michigan released bugs that feed on spotted knapweed earlier this year.    From Wordnik.com.  [Will Killing This Invasive Plant Harm Bees?] Reference

Mauve scabious and darker purple knapweed wave their heads in the aftermath of a summer thunderstorm.    From Wordnik.com.  [Butterflies: out of the blue] Reference

Spotted knapweed, also known as starthistle, was introduced in the U.S. from Europe in the late 1800s.    From Wordnik.com.  [Will Killing This Invasive Plant Harm Bees?] Reference

He said replacing knapweed with other flowers is a must because of the way Michigan beekeepers use the plant.    From Wordnik.com.  [Will Killing This Invasive Plant Harm Bees?] Reference

Leafy spurge and spotted knapweed outcompete wildlife-friendly plants while offering no nutritional value of their own.    From Wordnik.com.  [Three Ways Hunters and Fishermen Can Help Stop the Spread of Invasive Weeds] Reference

If knapweed control efforts prove successful, he said: "It could be detrimental to the future of the beekeeping industry.".    From Wordnik.com.  [Will Killing This Invasive Plant Harm Bees?] Reference

Somehow their snapping flight filled the space of the clearing and then they landed on dark purple knapweed flowers to feed.    From Wordnik.com.  [Country diary: Wenlock Edge] Reference

It's not clear why Michigan beekeepers are so worried about knapweed control when those in other states haven't been as much.    From Wordnik.com.  [Will Killing This Invasive Plant Harm Bees?] Reference

Some in the industry speculated Michigan beekeepers may rely on knapweed more for nectar and pollen than those in other states.    From Wordnik.com.  [Will Killing This Invasive Plant Harm Bees?] Reference

Two knapweed-eating flies were released in Michigan in the 1990s, but those don't appear to have curbed its spread, Rauscher said.    From Wordnik.com.  [Will Killing This Invasive Plant Harm Bees?] Reference

He said he fears the economically-troubled state won't have the resources needed to fully replant areas where knapweed is killed off.    From Wordnik.com.  [Will Killing This Invasive Plant Harm Bees?] Reference

A few swallows swoop low and the rank green is broken by pink hemp agrimony, cream meadowsweet, blue tufted vetch and purple knapweed.    From Wordnik.com.  [Country diary] Reference

Many beekeepers have set up shop near large expanses of knapweed, said Roger Hoopingarner, president of the Michigan Beekeepers Association.    From Wordnik.com.  [Will Killing This Invasive Plant Harm Bees?] Reference

"If spotted knapweed goes away and there is nothing that will replace it, then some of these beekeepers . . . will just leave the state," Hoopingarner said.    From Wordnik.com.  [Will Killing This Invasive Plant Harm Bees?] Reference

Hemp agrimony, bird's-foot trefoil and knapweed attracted the attention of commas, common blues, red admirals and the only painted ladies we've encountered so far this year.    From Wordnik.com.  [Country diary: Durham coast] Reference

Michigan officials said they're keenly aware of the importance beekeepers place on knapweed, which blooms in late July and early August when many other plants aren't flowering.    From Wordnik.com.  [Will Killing This Invasive Plant Harm Bees?] Reference

Even if the project is expanded, it could be 10 to 15 years before the bugs have a substantial impact on the presence of knapweed, leaving time for beekeepers to adjust, he said.    From Wordnik.com.  [Will Killing This Invasive Plant Harm Bees?] Reference

Spotted knapweed is a non-native plant that produces.    From Wordnik.com.  [Columbia Missourian: Latest Articles] Reference

Unanticipated effects of using gall-flies to control spotted knapweed.    From Wordnik.com.  [Ralph Maughan's Wildlife News] Reference

Grant said someone once dumped a pickup load of knapweed in the middle of the refuge.    From Wordnik.com. Reference

It controlled spotted knapweed in an operational study in the Lolo National Forest in Montana.    From Wordnik.com. Reference

Strong woody knapweed endures it, so does toadflax and pale blue scabious, and wild mignonette.    From Wordnik.com.  [The Life of the Fields] Reference

At Pearson's grassland study site, spotted knapweed makes up more than half of the plant ground cover.    From Wordnik.com.  [EurekAlert! - Breaking News] Reference

The abundance of knapweed leads to lots of gallfly larvae, which serve as a food subsidy for the mice.    From Wordnik.com.  [EurekAlert! - Breaking News] Reference

Missouri officials say summer is the best time to go after spotted knapweed because it's most exposed.    From Wordnik.com.  [Columbia Missourian: Latest Articles] Reference

Birdsfoot trefoil, cowslip, field scabious, lady's bedstraw, knapweed and yarrow may also be in the mix.    From Wordnik.com.  [The Independent - Frontpage RSS Feed] Reference

Scientists and managers expected that this seed deficiency would lead to limited knapweed population growth.    From Wordnik.com.  [EurekAlert! - Breaking News] Reference

We have talked a lot about knapweed on this forum because of its negative consequences for wildlife habitat.    From Wordnik.com.  [Ralph Maughan's Wildlife News] Reference

Spotted knapweed, a flowering plant native to Eurasia, was first discovered in the United States in the late 1800s.    From Wordnik.com.  [EurekAlert! - Breaking News] Reference

Lincolnshire Wildlife Trust has been surveying 260 miles of verges and has found greater knapweed, clustered bellflower and small scabious.    From Wordnik.com. Reference

And pushed the knapweed bunches where I stood.    From Wordnik.com.  [Michael Collier reads “The Mouse’s Nest” by John Clare] Reference

Spotted knapweed 'is not a good neighbor'.    From Wordnik.com.  [The Albert Lea Tribune] Reference

These insects are natural enemies of knapweed.    From Wordnik.com.  [The Albert Lea Tribune] Reference