Madsen, J.D. and D.H. Smith, 1999. Vegetative Spread of Dioecious Hydrilla Colonies in Experimental Ponds, US Army Corps of Engineers.

Reprinted from Journal of Aquatic Plant Management (1999) 37(1): 25-29

ABSTRACT
Stolon formation and fragmentation are two vegetative mechanisms by which hydrilla colonies expand. These two mechanisms of spread were studied in ponds located in Lewisville, TX over a two-year period. Stolons were deter mined to be the predominant mechanism for localized expansion in undisturbed areas. While some fragments were produced, they accounted for only 0.1% of the establishment of rooted plants in new quadrats. Peak production of fragments occurred in October and November, with fragment densities of 0.15 N m^-2 d ^-1. Expansion by stolons occurred between June and November of each year, with higher rates of spread (up to 4.0 cm d^-1 radial growth) observed in the second season.

Entire Paper
Contact: John Madsen, US Army Corps of Engineers, Waterways Experiment Station, CEWES-ES-P, 3909 Halls Ferry Road, Vicksburg, MS 39180
Keywords: Hydrilla, Basic_biology, Monitoring
Product Type: Research, Predicting_the_spread
User Type: Resource Management