Combine Insecticed and Weed Killer

Discussion in 'Homeowner Assistance Forum' started by slick001, Aug 23, 2004.

  1. slick001

    slick001 LawnSite Member
    Messages: 6

    Are there any problems with mixing insecticed and a weed killer in the same liquid application to save having to do two seperate liquid applications?
  2. Critical Care

    Critical Care LawnSite Bronze Member
    Messages: 1,654

    Well... right off the bat a couple of things could happen. First of all the two may not mix and what you could end up with is something like oil and water. Secondly, the effects may be unknown. The interaction between the two chemicals could cause damage to desirable plants - if you're using a selective herbicide weed killer, or it could minimize either the effectiveness of the herbicide or insecticide.

    Also, since there are so many insecticides, so many different herbicides, we really can't make one generalized statement regarding this.

    Here is a short excerpt from the Univ of Minn.

    " is important to realize that some tank mixtures will work with little risk of physical incompatibility, reduced weed control, or herbicide-induced crop injury. Many tank mix combinations (especially with organophosphate insecticides and ALS herbicides) can enhance herbicide crop injury and that is why tank mixtures with these products should be avoided..."
  3. slick001

    slick001 LawnSite Member
    Messages: 6

    Thanks for the info,
    sounds like I better plan for doing them seperate!

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