Merit (breakthrough) new england!

Discussion in 'Pesticide & Herbicide Application' started by lawn king, Oct 1, 2012.

  1. Cadzilla

    Cadzilla LawnSite Senior Member
    Posts: 899

    1000 sq ft of damage on 87000 sq ft is minor. It may not have been necessary to apply curative to the entire property but probably not a bad idea.

    You guys are a real thin skinned bunch around here.

    To be honest I'm not even sure anyone who manufactures Merit (hows that....spelled right?) even claims you get 100% control.

    The idea in my opinion is to get the insect population below the damage threshold.
     
  2. Landgreen

    Landgreen LawnSite Member
    Posts: 223

    5 grubs per square foot is the threshold I have always used. I was seeing 10-20! Bad news. They had to go.
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  3. Landgreen

    Landgreen LawnSite Member
    Posts: 223

    Thats good news. My distributor put in a request to their supplier. Waiting to see what they say.
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  4. phasthound

    phasthound LawnSite Platinum Member
    Posts: 4,568

    I doubt Dylox will be effective on grubs now.
     
  5. Cadzilla

    Cadzilla LawnSite Senior Member
    Posts: 899

    Why do you think that?
     
  6. Cadzilla

    Cadzilla LawnSite Senior Member
    Posts: 899

    Yikes. I don't think I have ever seen grub pressure that bad. I didn't mean to be a dick, but don't count Merit out for a failure now and then.

    It's really the best insecticide to come out in the last twenty years ( well that and bifenthrin) and has protected a lot of turf and made us all a lot of profits!

    :clapping:
     
  7. Landgreen

    Landgreen LawnSite Member
    Posts: 223

    Dylox should be ok. In my area I would still apply it until the end of October. Grubs go deep when they need to avoid frost which will be a while yet.
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  8. phasthound

    phasthound LawnSite Platinum Member
    Posts: 4,568

    While grubs are still near the surface, they are now in their 3rd instar and are difficult to control.
     
  9. jbturf

    jbturf LawnSite Bronze Member
    Posts: 1,414

    barry our grubs our behind schedule and small, i suspect they are now in 2nd instar size, umass predicts 70% control i think i read at about this time w/dylox

    but obviously different grubs are at different stages, jab beetle grubs would likely be in 3rd instar here now, but im not really seeing them

    product used allectus .225% + fert / high resi rate
     
  10. phasthound

    phasthound LawnSite Platinum Member
    Posts: 4,568

    That's a good point.

    Here is the reply I received from Rich Buckley at the Rutgers Plant Diagnostic Lab regarding break though with Merit.
    I have not heard anything specific for this year, but I don't doubt there were control failures. Merit will not control asiatic garden beetles. It is known that they will invade areas as a secondary pest once the oriental and japanese beetles are removed by the product. I also suspect that due to the dry mid-summer period that egg-hatch was delayed until late-August when the rains started again. If you applied Merit as per the label in May, then it was probably used up by then. I think it best to use Merit when the adults fly in late-June or July so it lasts through late-summer into fall.
     

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