Turions remain dormant in the sediment through the summer until cooling water temperature triggers their germination in the fall. The germination rate of turions is very high, some estimates indicate between 60-80%.
J. Aquat. Plant Manage. 40: 2002. 99 Impacts of Carbohydrate Depletion by Repeated Clipping on the Production of Subterranean Turions by Dioecious Hydrilla ALISON M. FOX 1, W. T. HALLER 1 AND J. P. CUDA 2 ABSTRACT The production of subterranean turions (tubers) by hyd-rilla ( Hydrilla ...
Native Water-milfoils Late fall and early spring identification characteristics Several native water-milfoils form winter turions (buds). Turions are overwintering structures that are comprised of densely packed leaves.
Bur-like turions are produced at the stem tips. Turions germinate in late summer or fall. MANAGEMENT OPTIONS: As with all aquatic plants, control can be difficult, if not impossible.
Samples were separated into shoots, roots, inflorescence, and turions and then dried. Biomass (g m-2) and percent total nonstructural carbohydrates (TNC) were determined for each plant component.
This is terrible news since a single growing plant can develop approximately 30 turions. (In the July milfoil newsletter, Joseph wrote, "We have figured out that one turion growing unmolested for three years has the potential to produce 3,888,000 new plants."
• Subterranean turions are considered the more important of the two methods of turion reproduction. One single subterranean turion has been shown to produce over 6000 new turions per m 2, per year, while 2,803 axillary turions can be produced per m 2.
Weber (1972) discusses the importance of turions in the species reproduction. Many authors (see Cooperrider, 1995) recognize it as a subspecies of M. spicatum .
Turions may be attached to plants and/or have dropped to substrates, dependent upon season and other conditions. The box-core sampler would potentially collect turions in either case, whereas the rake methods would most likely only collect turions that remained attached to plants.
‘turions’. These structures pose the greatest challenge for controlling this aquatic weed species. Turions that form in the leaf axils and grow above ground