Vol. 15—1961 - NorthEastern Weed Science Society

570.
StHtARy
Invasion of Eurasian vatemilfoil in fresh and brackish waters
from New York to North Carolina and Tennessee constitutes a severe weed
problem affecting diversified interests including boating, .port and
cODlDercial fishing, and waterfowl hunting.
Preliminary studies on herbicidal control of this problem.
plant indicate that 2,4-D granules applied at the rate of 20 to 40 pounds
acid equivalent per acre give effective results in tidal areas. t1me
for treatment should be (a> when the plant reaches the water surface at
low tide and before it flowers, (b) when the water temperature is above
20 0 C., and (c) when the tide is ebbing and near the period of low water
slack.
Future studies will be directed toward refinement of control
techniques and evaluation of the toxicological effects of herbicides on
fishery resources.
REFERENCESClmo
Beaven, G. Francis. 1960. Watemilfoil studies in the Chesapeake area.
Maryland Dept. of Research and Education. Ref. No. 60-59.
Mimeo. S pp.
Boschetti, Mario K. 1959. Field testing of Kuron as an aquatic
herbicide in Massachusetts. NBWCC,315-321.
Cortell, Jason II. 1960. Re-evaluation of the concentrations required
for effective aquatic weed control with silvex. NEWCC,478-482.
Hall, William C. 1960. Control of various aquatic weeds with si!vex.
NEWCC,476-482.
Huckins, Robert C. 1960. Aquatic weed control, Carnegie Lake, Princeton,
New Jersey. NBWCC,496-.501.
Springer, Paul F. 1959. StllBlZy of interagency meeting on Eurasian
watermilfoil. Bureau of Sport Fisheries and Wildlife.
Administrative report. K1.IIeo. 10 pp.
Younger, Roy. 1959. Progress report on the use of K'uron, 2,4-D and
2,4,5-TP granules as aquatic herbicide8. NEWCC,322-328.