Vegetation Management and Maintenance Plan - Watsonville ...

Table 7. Invasive Weed Treatment – Yearly Implementation Schedule, Watsonville Wetlands Trail System Project Area (continued)
Task Jan Feb Mar Apr May Jun July Aug Sept Oct Nov Dec
Establish solarization plots within Kikuyu grass area; maintain 10mm
black plastic over plot for minimum of 1 year. Periodically monitor site
and repair fabric/plastic as needed. After treatment revegetate treated
area with native perennial grass species.
Establish solarization plots within Harding/canary grass areas; 10mm
black plastic over plot for minimum of 1.5 years. Periodically monitor
site and repair fabric/plastic as needed. After treatment revegetate
treated area with native perennial grass species.
Prior to flowering, mow and/or weed-whip selected high priority areas
of poison hemlock. Conduct 3-4 more mowings/whippings into
summer and fall. Repeat for 3-5 years.
Establish pilot plot for alternative treatment for poison hemlock, test
solarization for 1-2 years; test flaming 4 times per year similar to
mowing.
Establish pilot plot for passive revegetation areas; remove radish,
poison hemlock and Harding grass in selected areas over 5-year period,
allowing natural revegetation of coyote brush and rose thickets.
Moderate Priority Treatment Areas (Years 5-10)
Hand-pull or hoe patches of English/Algerian ivy. Remove acacias;
treat cut stumps with herbicide to reduce suckering.
Prior to flowering of these species, hand-pull or hoe all patches of wild
mustard, wild radish, Italian thistle, and bull thistle.
Continue solarization plots within Harding/canary grass patch;
maintain 10mm black plastic over plot for minimum of 1 year.
Periodically monitor site and repair fabric/plastic as needed. After
treatment revegetate treated area with native perennial grass species.
Prior to flowering, mow and/or weed-whip selected patches of poison
hemlock. Conduct 3-4 more mowings/whippings into summer and fall.
Repeat for 3-5 years.
Vegetation Management and Maintenance Manual
Draft 33 July 27, 2007