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Gail from Bourbon, Mo writes

How do I mix Hi-Yield 2, 4-D Selective Weed Killer for a pond with fish?

Answer:

Hi-Yield 2, 4-D Selective Weed Killer is labeled for boat applications at the rate of 1 gallon of product to 25 gallons of water per acre. During the growing season, weeds decompose in a 2 to 3 week period following treatment. Begin treatment along the shore and proceed outwards in bands to allow fish to move into untreated areas. Waters having limited and less dense weed infestations may not require partial treatments.Uniform coverage is essential. Avoid submerging plants after treatment. Application should be made when leaves are fully developed above water line and plants are actively growing. Treatment of aquatic weeds can result in oxygen loss from decomposition of dead weeds. This loss can cause fish suffocation. Therefore, to minimize this hazard, treat 1/3 to 1/2 of the water area in a single operation and wait at least 21 days between treatments. Begin treatments along the shore and proceed outwards in bands to allow fish to move into untreated areas. The maximum rate per broadcast application is 4.7 gallons per surface acre, limited to applications is 2 per year. Do not make a broadcast application within 21 days of previous broadcast application. Spot treatments are permitted. 

Answer last updated on: 09/15/2017

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