Efficacy of glyphosate and five surfactants for controlling giant salvinia
Journal of Aquatic Plant Management
By: J.F. Fairchild, A.L. Allert, J.S. Riddle, and D.R. Gladwin
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Abstract
Giant salvinia (Salvinia molesta Mitchell) is a non-native, invasive aquatic fern that was recently introduced to the southern United States. The aggressive nature of the species has led to concerns over its potential adverse impacts to native plants, fish, and invertebrates. We conducted a study to determine the efficacy of glyphosate [isopropylamine salt of N-(phosphono-methyl)glycine] and several surfactants for control of giant salvinia. Studies were conducted over a 42-day period using static renewals (twice weekly) with 4% Hoagland's medium (10 mg/L N equivalent) in replicated 2-L containers. Five concentrations of glyphosate (0, 0.45, 0.91, 1.82, and 3.60% v:v) and five surfactants (0.25% concentration, v:v; Optima???, Kinetic???, Mon 0818???, Cygnet Plus???, and LI-700???) were applied with a pressurized sprayer as a single surface application in a fully nested experimental design. Untreated giant salvinia grew rapidly and exhibited an increase of 800% wet weight biomass over the 42-day test duration. Glyphosate, with and without surfactants, exhibited efficacy at concentrations as low as 0.45% of the commercial formulation. Glyphosate with Optima was the only mixture that resulted in complete mortality of plants with no regrowth.
Suggested Citation
Fairchild, J., Allert, A., Riddle, J., Gladwin, D., 2002, Efficacy of glyphosate and five surfactants for controlling giant salvinia: Journal of Aquatic Plant Management, v. 40, no. 2, p. 53-58.
| Publication type | Article |
|---|---|
| Publication Subtype | Journal Article |
| Title | Efficacy of glyphosate and five surfactants for controlling giant salvinia |
| Series title | Journal of Aquatic Plant Management |
| Volume | 40 |
| Issue | 2 |
| Year Published | 2002 |
| Language | English |
| Larger Work Type | Article |
| Larger Work Subtype | Journal Article |
| Larger Work Title | Journal of Aquatic Plant Management |
| First page | 53 |
| Last page | 58 |