Aquacide — Aquatic Weed Control: 3 Tips for Water Plantain Control

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Aquatic Weed Control: 3 Tips for Water Plantain Control

Published by Jamie Markoe on November 14, 2013 0 Comments

Water Plantain (alisma) is a perennial herb, native to Eurasia and North Africa, now present world-wide.

Water Plantain grows in shallow marshy soil along the shoreline.  It has stiff lance-shaped leaves 5-8” long that stand above the water surface.  Emersed leaves have prominent parallel veins.  Submersed leaves are smaller and ribbon-like with less defined veins.  Water Plantain has small white 3-petaled flowers which whorl around a delicate stalk that open in the morning from June through August.

Water Plantain reproduces from seed and division of corms (a fleshy bulb-like underground stem).

Water Plantain is a food source for most waterfowl & fish.

When left unattended this vigorously growing weed can become a real problem and is considered a noxious weed in California rice fields.

3 Tips to eradicate Water Plantain are:

1)      Early physical removal by grabbing the main stem at center and pulling upward.  Make sure to get the entire corm and root.

2)      Use 2,4-D systemic herbicide for early spring control.  Apply as new growth begins to appear.  Repeat treatment 3-5 weeks after the first application if weeds begin to show signs of recovery.

3)      Use glyphosate systemic herbicide for mid-season control.  Apply when 50% or more foliage is above the water surface and weeds are in full bloom.  Repeat treatment 3-5 weeks after the first application if weeds begin to show signs of recovery.

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