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Gift of Grub From Neighbor

Discussion in 'Pesticide & Herbicide Application' started by heygrassman, Apr 14, 2002.

  1. heygrassman

    heygrassman LawnSite Senior Member
    Posts: 509

    Here is an odd one.. I am bidding neighbors. One's yard is gone thanks to grub 75-80%. Neighbor is starting to see damage 5-10%. I am proposing to neighbor #1 a complete renovation: extract turf and soil 2-3 inches and apply anti grub to kill any additional larve, then 2" of loam, and sod, seed, hydro seed.

    For neighbor #2 (5-10% damage) I am proposing Aug app of Mach 2. Neighbor #1 used GrubX and damage got worse. I am fearing resistance to Merit.

    Am I outta line anywhere??


  2. Kent Lawns

    Kent Lawns LawnSite Senior Member
    from Midwest
    Posts: 870

    Remove the soil?
    I don't think that is necessary.

    Merit resistance?
    I've never heard of it. Seems August is too late to apply. I've not seen where Merit applied at the proper rate and watered in wasn't effective.

    I'd apply Dylox now and slit-seed. Then Merit in JULY. Make sure all is watered in and the lawn does not dry out in the summer.
  3. GroundKprs

    GroundKprs LawnSite Bronze Member
    Posts: 1,969

    HALT! Breathe in, think, and go learn the life cycle of your supposed problem. Seems to me that OSU has a great program for grubs, especially. Lots of speakers at IN conferences over the years have been from OSU.

    Simple overview: grubs hatch in Aug, preventative needs to be in place before Aug (maybe sooner, our extension guys advise us). Grub damage is mostly done in late summer, early fall, when the young are rapidly growing to a size to survive winter. Very little damage done in springtime, it is a waste of time to treat in spring.

    Unless you know the life cycle of your problem, you might as well just go after them with a shotgun. And you need to know what type of grub you're dealing with - Jap beetle, masked chafer, etc.
  4. heygrassman

    heygrassman LawnSite Senior Member
    Posts: 509


    Directly out of OSU Extension Bulletin 841-8 which ODoA is using as training for the App Test.

    There are beliefs that heavy application for Grub can lead to Sod Webworm problem.

    Same bulletin:
    I have tried to do my homework.

    IN interviewing the homeowner, the home owner has applied GrubX in significant application in mid summer (not convinced that it was watered in sufficiently.) Scotts has also had a hand in it last year. TGCL will apply but not guarantee and will offer silt seeding at a "discount" if app does not work. Grubs are still in full effect. My thoughts were that maybe a change in product with Mach2 with a early Aug app (Aug 1-4) might work.

    This is the White Grub (Japanese Beetle).

    Client is not enthused with the thought of a slit seed without a guarantee. They are looking to sell in 1-2 years.

    Sorry to ramble. I will followup with a pic of neighbor number 1 if I can get the pic small enuf.

  5. heygrassman

    heygrassman LawnSite Senior Member
    Posts: 509

    Neighbor #1

    neighbor #1 copy.jpg
  6. GroundKprs

    GroundKprs LawnSite Bronze Member
    Posts: 1,969

    First quote means that program of applying grub control without a known grub problem on site is not a proper procedure. Criticizes selling of grub apps just to churn $$$.

    Second quote refers to curative applications. A preventative like Merit or Mach2 needs to be in place before grubs hatch for best efficacy.

    "White grubs" can be Jap beetle, masked chafer, or others; they're all white. You have verified Jap beetle by checking raster pattern on a few of them?

    You're working with nature, and the only rule of nature is that things will change. So gaurantees about plants and insects are useless.

    Removing 2" of soil for a grub problem is not a functional recourse. Yes, the grubs are there now, but they are not doing significant damage; damage from grubs occurs after Aug hatching.

    Lady once wanted me to gaurantee no Jap beetles on her roses. Told her for $1 million I could get a 95% chance of control; during July I would treat all Jap beetle adults found within 5 blocks of her roses, if property owners would allow treatment. She never bugged me again about beetles. LOL.

    For best info for you, check with your state extension turf specialists.
  7. tremor

    tremor LawnSite Bronze Member
    Posts: 1,476

    First: Grubex is not Merit anymore. It's Mach2. Which on was applied?
    Second: Are we sure that pic isn't sod webworms or army worms? Merit is lame on catepillars. Mach2 is better on cats.

  8. Kent Lawns

    Kent Lawns LawnSite Senior Member
    from Midwest
    Posts: 870

    Does not even look like grubs were the primary cause of turf loss on the picture posted.
  9. jeffyr

    jeffyr LawnSite Senior Member
    Posts: 876

    That was my thought too. I think it was 2 seasons ago that Grubex switched from Merit to Mach2.

  10. johnkub14

    johnkub14 LawnSite Member
    from 7
    Posts: 4

    I found through use, that a make called 7 works best for me. It bounds with the soil, and lasts the season.

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