Field burrweed
Soliva sessilis
Soliva sessilis, commonly known as lawn burweed or field burrweed, is an annual weed belonging to the Asteraceae family. Native to South America, it has become a widespread and troublesome weed in lawns and turf areas in various regions. Here is information about Soliva sessilis:
Lawn Burweed Characteristics:
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Growth Form:
- Lawn burweed is a low-growing annual weed that can form dense mats.
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Leaves:
- The leaves are finely divided, giving them a fern-like appearance.
- Each leaflet typically has a spiny tip.
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Flowers:
- The plant produces small, inconspicuous flowers.
- Flowers are followed by seed heads that consist of burr-like structures.
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Burr-Like Seed Heads:
- One of the distinctive features of lawn burweed is the presence of small, spiny seed heads or burrs.
- These burrs can be painful when stepped on, making the weed a nuisance in lawns.
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Habitat:
- Lawn burweed is commonly found in lawns, turfgrass, and open areas with well-drained soil.
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Germination:
- Germination usually occurs in late fall or early winter.
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Control Measures:
- Pre-emergent herbicides applied in late summer or early fall can help prevent the germination of lawn burweed seeds.
- Post-emergent herbicides can be used to control established plants.
- Hand pulling or mechanical removal may be effective for small infestations.
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Impact on Lawns:
- Lawn burweed can be problematic for lawns as it competes with desirable grass species and creates discomfort due to its spiny seed heads.
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