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Japanese Beetle in Southern Wisconsin...HELP!!!

Discussion in 'Pesticide & Herbicide Application' started by tjhowe2005, Jul 21, 2013.

  1. tjhowe2005

    tjhowe2005 LawnSite Member
    Messages: 3

    Please Help!!! I just took over maintaining the landscape on 15 huge properties. They are very nice homes on a lake here. I am getting everything up to snuff but we have a new problem here with Japanese Beetles. I know it has been a long term problem out east so I need your suggestions. I have an infestation mainly on my canna lilies, roses, creeping hydrangeas and oak leaf hydrangeas. To my knowledge it is too late to do a soil drench so I should do a foliar application of imidacloprid with a pyrethroid like permethrin. I have Merit 2F (21% imidacloprid) and permethrin (10%). No one in my area has a clue (even the chemical dealers) on proper mixing rates or application techniques, they just tell me to read the label which is little help. I want to do this properly and don't want to indiscriminately run around spraying pesticides that do have negatives. I am aware of the questioning of colony collapse disorder with imidacloprid. Some of these homes have hundreds of each of these plants, so whatever I do there will be a lot of pesticides used, and there is a lake there we don't want to effect. Do any of you have suggestions for me????
    Thank You
  2. RigglePLC

    RigglePLC LawnSite Fanatic
    Messages: 13,717

  3. foreplease

    foreplease LawnSite Silver Member
    Messages: 2,062

    Agree with Riggle on imidacloprid. I have had great results and fast with Spectracide Triazicide on landscape plants. Company's link to the label is not currently working but this one will give you some information. Be sure to get the concentrate rather than RTU.
  4. tjhowe2005

    tjhowe2005 LawnSite Member
    Messages: 3

    Thanks Guys!!! Last week I did do a foliar application of Lambda-cyhalothrin combined with Merit and will see how it looks this week. If I use Cyfluthrin or other similar pyrethroids for control, how many days should elapse between applications? These plants are all on irrigation that is currently running 3-4 times a week. Also, should I rotate the pesticide I use so I don't breed resistant beetles? The Ovavescicula looks like a great longer term option and I will investigate using it.

  5. phasthound

    phasthound LawnSite Fanatic
    Messages: 5,138

  6. tjhowe2005

    tjhowe2005 LawnSite Member
    Messages: 3

    Used Cyfluthrin on the plants affected and it worked well...thanks!!!
  7. DA Quality Lawn & YS

    DA Quality Lawn & YS LawnSite Fanatic
    Messages: 9,279

    Yeah I have seen a few straggler Jap beetles around here too. Hate to say it but we need a good hard cold winter to send em back down south again.

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