A GUIDE TO HARVESTING
MORSES POND IN 2005:
PILOT PROGRAM TO CONTROL WEEDS IN AN AREA SUITABLE TO AVAILABLE EQUIPMENT AND MANPOWER
Map of pond areas
Plant Harvesting in Morses Pond: 2005
· Maintenance of open water in Area 4, the eastern cove, an area of approximately 9.4 acres. This area has top priority, as it should be manageable with the equipment and manpower available, while a larger area will strain that capacity and result in less acceptable conditions overall.
· Harvesting in other areas as time permits, with a focus on surface growths such as waterlilies and milfoil or fanwort that has reached the surface.
· This program will demonstrate the ability to control rooted plants and create desired conditions in an area appropriate to harvesting capacity. If successful, the program could expanded through additional equipment and manpower.
· Area 4, the eastern cove, is shown on the attached map.
· Areas 2 and 6 would have the next highest priority, but cannot be properly managed with the available harvesting capacity. Work in area 4 will have priority whenever harvesting is needed in that area. Residents will be informed of this focus, which will result in limited harvesting elsewhere.
· Estimated rate of 0.15 to 0.3 ac/hr for harvesting, or about 1.1 load per hour; operator to keep records of hours worked and loads delivered to hopper at beach. Rate may increase after first cutting as plant density decreases.
· Operator to determine most efficient path for area 4; probably best to follow a path that results in least need to change cutting depth for each pass through the area (i.e., cut a swath at 3 ft depth, then another at 4 ft, etc., as opposed to going in a straight line and constantly changing cutting depth); maximize cutting time and rate. Cut as much of the area as possible, recognizing limitations in very shallow water.
· Current estimate of 40% of time spent actually cutting plants, 60% spent on transport and offloading; operator to estimate actual cutting time per day and total time worked on lake per day.
· Current estimate of <5 hours per day and <5 days spent on water in harvesting program; operator to record hours and days worked on Morses Pond.
· Operator to cut nuisance species as close to bottom as possible without cutting any existing, low growing desirable plants; few if any of these were found in area 4 (Robbins pondweed, Potamogeton robbinsii was present in 2004, but not observed yet in 2005) – see addendum for target species, species to avoid, and intermediate species.
· Operator to avoid areas of desirable species when dominant; only broadleaf pondweed (Potamogeton amplifolius) appears to qualify in area 4 in 2005, but Robbins pondweed (Potamogeton robbinsii) was present in 2004.
Eurasian watermilfoil (Myriophyllum spicatum)
Variable watermilfoil (Myriophyllum heterophyllum)
Fanwort (Cabomba caroliniana)
Water chestnut (Trapa natans)
Species to Harvest as
Waterweed (Elodea canadensis)
Naiad (Najas flexilis)
White water lily (Nymphaea odorata)
Yellow water lily (Nuphar variegata)
Species to Avoid when Harvesting
Broadleaf pondweed (Potamogeton amplifolius)
Robbins’ pondweed (Potamogeton robbinsii)
Coontail (Ceratophyllum demersum)
Other species in the lake are uncommon, especially in area 4; collect a sample and inquire before harvesting if something different is encountered.
Harvesting Information to be Collected
For each day and area of harvesting: Record for each area on each day of harvesting
Date: ______ Allows a record of when and how often
Area harvested: ______ Use map; Area 4 has top priority
Hours related to harvesting: ______ Time spent on water or in maintenance
Hours spent actually cutting: ______ Actual harvesting time; exclude transport/offload
Full loads brought to beach: ______ Hopper full or close to it
Partial loads brought to beach: ______ Hopper <75% full
Identifiable plants harvested: ___________ List any plants that could be identified,
in order of abundance
Notes or comments:
Species to be Harvested or Avoided
Eurasian watermilfoil (Myriophyllum spicatum) – feathery leaves, reddish stem, small reddish seed spike may protrude above water.
Variable watermilfoil (Myriophyllum heterophyllum) – similar to M. spicatum, but bushier; seed spike protruding above water has different looking leaves just below it.
Fanwort (Cabomba caroliniana) – looks similar to milfoils, but has fan-shaped leaves when observed closely; flowers are white.
Water chestnut (Trapa natans) Fan shaped leaves in a rosette arrangement, sharp-pointed nuts (seeds).
Species to Harvest as
Waterweed (Elodea canadensis) – dark green, curved leaves, denser at tips. Leaves in whorls of 3 or 4.
Naiad (Najas flexilis) – small elongate leaves with spines along edges, very bushy growths in pond.
White water lily (Nymphaea odorata) – roundish leaves, slit on one side, flowers showy white with yellow toward center.
Yellow water lily (Nuphar variegata) – leaves heart shaped, yellow flowers.
Species to Avoid when Harvesting:
Broadleaf pondweed (Potamogeton amplifolius) – wide, curved leaves with green to bronze color.
Robbins’ pondweed (Potamogeton robbinsii) – fern-like leaves, alternating, usually bronze.
Coontail (Ceratophyllum demersum) – whorls of spiny thin leaves, usually very bushy, gritty to the touch.
Algal mats may also be harvested to the extent possible, usually with rooted plant growths.