MAGNACIDE® H Herbicide

For the control of vascular weeds and algae in irrigation canals.



This pesticide is extremely toxic to fish and wildlife. Do not discharge effluent containing this product into lakes, streams, ponds, estuaries, oceans or other waters unless in accordance with the requirements of a National Pollutant Discharge Elimination System (NPDES) permit and the permitting authority has been notified in writing prior to discharge. Do not discharge this product to sewer systems without previously notifying the local sewage treatment authority. For guidance contact your State Water Board or Regional Office of the EPA. Do not contaminate water when disposing of equipment washwaters.


Users should wash hands before eating, drinking, chewing gum, using tobacco, or using the toilet. Users should remove PPE immediately after handling this product. Wash the outside of the gloves before removing. As soon as possible, wash thoroughly and change into clean clothing.

  • Markets: Aquatic

State Registered – AZ, CA, CO, ID, KS, MT, NE, NM, NV, OR, SD, UT, WA, WY

Federally restricted use pesticide


MAGNACIDE®H Herbicide is a water-soluble material for the control of submersed and floating weeds and algae in irrigation canals. This material must be applied in accordance with directions in the Magnacide® H Herbicide Application and Safety Manual by a certified applicator or under a certified applicator’s supervision. Do not permit dairy animals to drink treated water. Do not use where waters will flow into potential sources of drinking water. Water treated with Magnacide® H Herbicide must be used for irrigation of fields, either crop bearing, fallow or pasture, where the treated water remains on the field OR held for 6 days before being released into fish-bearing waters or where it will drain into them


For additional information on this product please reference the Safety Data Sheet and Product Label listed below.



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