Vegetation Management and Maintenance Plan - Watsonville ...
Vegetation Management and Maintenance Plan - Watsonville ...
Vegetation Management and Maintenance Plan - Watsonville ...
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Table 4. Levels of Invasive Weed Infestations <strong>and</strong> Potential Control Techniques, <strong>Watsonville</strong> Wetl<strong>and</strong>s Trail System Project Area<br />
Common<br />
Name<br />
Scientific Name Invasive Weed<br />
Ranking<br />
Infestation<br />
Threshold<br />
Growth Pattern<br />
Potential Control Techniques<br />
Yellow star<br />
thistle<br />
Bull thistle<br />
Centaurea<br />
solstitialis<br />
High Greater than 25<br />
plants or patch<br />
greater than 15 sq.<br />
ft.<br />
Annual<br />
Spread by seed,<br />
including seed on old<br />
flower heads. The bristly<br />
seed coat attaches to<br />
equipment, vehicles <strong>and</strong><br />
animals.<br />
<strong>Management</strong> Goal: Reduce number of patches to