Sentences with word «knapweed»

Yellows starthistle may expand in California and Nevada as the climate changes while spotted knapweed moves toward higher elevations and spreads in Montana, Wyoming, Utah and Colorado, the study showed.

The Forest Service and the Sierra Club have run float trips on the Salmon River with volunteers who pull out spotted knapweed by its taproot.

His studies on spotted knapweed take him to South America and Turkey to study «what allows a species that is a mild - mannered plant in Europe to become a sort of monster in North America or South America.»

Plants were chosen for the popularity with foraging bees and included common bird's - foot trefoil (Lotus corniculatus), common knapweed (Centaurea nigra), red clover (Trifolium pratense) and Alsike clover (Trifolium hybridum).

Nectar - rich plants such as red clover, greater knapweed and bird's foot trefoil help bees, birds and butterflies thrive.

He examined a patch of spotted knapweed and noticed seed heads scattered on the ground in small piles.

The primary targets of the spraying are spotted knapweed and rush skeleton weed, two exotics from Europe that are common in the rangeland of Idaho and Montana.

Keeping spotted knapweed and skeleton weed and a dozen other foreign plants out of the Frank entirely is impossible, however.

He stumbled, almost literally, onto the knapweed system while working on his master's degree.

They were full of gall fly larvae, which live in the knapweed seed heads.

When spotted knapweed was introduced into western Montana, the normally benign plant took over the grassland community, crowding out other species.

It was widely believed that nothing ate spotted knapweed; that's why it had become so invasive.

When scientists brought in a native enemy of knapweed in an effort to control its spread — the gall fly — the knapweed population continued to thrive.

Similarly, Bradley et al. (2009) predict that yellow starthistle (Centauria solstitialis) and salt cedar (Tamarix ramosissima) will expand their range, downy brome (cheatgrass) and spotted knapweed will shift in range (neither increase nor decrease), and the range distribution of leafy spurge is likely to contract under predicted climate scenarios.

Then they compared predicted changes in precipitation and temperature with the most hospitable conditions for five of the West's most obnoxious noxious plants: cheatgrass, spotted knapweed, yellow starthistle, tamarisk and leafy spurge.