| 释义 |
Definition of swallowwort in US English: swallowwortnoun ˈswälōwərtˈswɑloʊwərtˈswɑloʊwərt 1A plant of the milkweed family, the follicles of which suggest a swallow with outstretched wings, often becoming a weed. Several species in the family Asclepiadaceae, in particular the black swallowwort (Cynanchum or 'Vincetoxicum' nigrum) Example sentencesExamples - Studies have shown that when the monarchs lay their eggs on pale or black swallow-wort, the larvae die within three days.
- We are studying the impacts and control of infestations of the swallow-worts (Vincetoxicum nigrum
- The purple-flowering black swallow-wort spreads rapidly in open areas and is found in New York's Hudson Valley and on Long Island, and throughout New England.
- During the last two decades, the invasive exotic vines pale swallow-wort and black swallow-wort have become a major problem in New York State.
- Black swallow-wort is difficult to control and has been noted to invade prairie areas.
- The fifth edition of Gray's Manual of Botany reports black swallow-wort to be a weed escaping from gardens in the Cambridge Massachusetts area.
- The key is education so that people can recognize swallow-wort in it's early stages, and awareness about it's devastating effects so that it will be taken seriously.
- Research shows that the butterfly will cue into black swallow-wort and lay eggs, but the larvae do not survive.
- Where found in Wisconsin, black swallow-wort has spread widely, creating rapidly growing mats of tangled vines.
- The purple-flowered black swallow-wort prefers open areas and have a foothold in the Hudson Valley, Long Island, southern New York and the New England coast.
- If you search for black swallow-wort on the Internet, you will find several web sites dedicated to telling you how to rid your property of this plant.
- This presentation will focus on patterns of host use by these herbivores within the genus Vincetoxicum and address their potential effectiveness as biocontrol agents of swallow-worts in North America.
- First up this weekend is an interesting post at Science Notes about the three invasive swallow-worts that are problems in North America.
- My current research at Cornell seeks to increase knowledge about the biology/ecology of two introduced species of swallow-wort [pale swallow-wort and black swallow-wort].
- This talk will begin by briefly introducing the biology of swallow-worts and the current management techniques used by locals.
- To date, the two thug swallow-worts have spread to at least 20 states and several Canadian provinces.
- Pale swallow-worts invade a wide variety of habitats including old fields, open woodlands, pastures, roadsides, and floodplains.
- They found eggshells as evidence of monarch oviposition on black swallow-wort in uncaged field populations of swallow-wort and milkweed.
- Two soil types, from areas dominated by pale and black swallow-wort, will be placed in pots and the pH adjusted to one of three different pH conditions.
- Although both swallow-worts share the ominous ‘dog-strangling’ moniker, they're actually a threat to Monarch butterflies.
2British The greater celandine, formerly believed to be used by swallows to restore their sight.
Definition of swallowwort in US English: swallowwortnounˈswälōwərtˈswɑloʊwərt 1A plant of the milkweed family, the follicles of which suggest a swallow with outstretched wings, often becoming a weed. Several species in the family Asclepiadaceae, in particular the black swallowwort (Cynanchum or 'Vincetoxicum' nigrum) Example sentencesExamples - Studies have shown that when the monarchs lay their eggs on pale or black swallow-wort, the larvae die within three days.
- We are studying the impacts and control of infestations of the swallow-worts (Vincetoxicum nigrum
- The purple-flowering black swallow-wort spreads rapidly in open areas and is found in New York's Hudson Valley and on Long Island, and throughout New England.
- During the last two decades, the invasive exotic vines pale swallow-wort and black swallow-wort have become a major problem in New York State.
- Black swallow-wort is difficult to control and has been noted to invade prairie areas.
- The fifth edition of Gray's Manual of Botany reports black swallow-wort to be a weed escaping from gardens in the Cambridge Massachusetts area.
- The key is education so that people can recognize swallow-wort in it's early stages, and awareness about it's devastating effects so that it will be taken seriously.
- Research shows that the butterfly will cue into black swallow-wort and lay eggs, but the larvae do not survive.
- Where found in Wisconsin, black swallow-wort has spread widely, creating rapidly growing mats of tangled vines.
- The purple-flowered black swallow-wort prefers open areas and have a foothold in the Hudson Valley, Long Island, southern New York and the New England coast.
- If you search for black swallow-wort on the Internet, you will find several web sites dedicated to telling you how to rid your property of this plant.
- This presentation will focus on patterns of host use by these herbivores within the genus Vincetoxicum and address their potential effectiveness as biocontrol agents of swallow-worts in North America.
- First up this weekend is an interesting post at Science Notes about the three invasive swallow-worts that are problems in North America.
- My current research at Cornell seeks to increase knowledge about the biology/ecology of two introduced species of swallow-wort [pale swallow-wort and black swallow-wort].
- This talk will begin by briefly introducing the biology of swallow-worts and the current management techniques used by locals.
- To date, the two thug swallow-worts have spread to at least 20 states and several Canadian provinces.
- Pale swallow-worts invade a wide variety of habitats including old fields, open woodlands, pastures, roadsides, and floodplains.
- They found eggshells as evidence of monarch oviposition on black swallow-wort in uncaged field populations of swallow-wort and milkweed.
- Two soil types, from areas dominated by pale and black swallow-wort, will be placed in pots and the pH adjusted to one of three different pH conditions.
- Although both swallow-worts share the ominous ‘dog-strangling’ moniker, they're actually a threat to Monarch butterflies.
2British The greater celandine, formerly believed to be used by swallows to restore their sight.
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