Several environmental organizations in Rhode Island and Massachusetts are banding together in calling for volunteers to help harvest invasive water chestnuts, an invasive plant found in several local ponds. Volunteers are needed at Turner Reservoir to gently weed the invasive plants out of the water before the seeds form at the end of July. Non-boating volunteers can stay ashore and help haul the containers from boats to unload the plants for disposal. Wheelbarrows will be provided to compost the plant on site. Paddlers who bring their own canoe or kayak, boaters with small trolling motors, or even anglers donning their chest waders can help by plucking plants out of the water. Volunteers will be provided a bucket or laundry basket and gloves to collect plants. Free canoes will be available on-site to use for the event, provided by the Friends of the Blackstone/Blackstone River Watershed Council. Interested volunteers must pre-register to reserve a spot in a canoe. The harvests will take place Tuesdays, July 2 and 9, from 4-7 p.m.; Wednesday, July 10 and Saturday, July 6, from 9 a.m. to noon.