1. Missed the live Ask the Expert event?
    Catch up on the conversation about fertilization strategies for success with the experts at Koch Turf & Ornamental in the Fertilizer Application forum.

    Dismiss Notice

annual white grubworms already

Discussion in 'Pesticide & Herbicide Application' started by americanlawn, Aug 17, 2011.

  1. americanlawn

    americanlawn LawnSite Fanatic
    from midwest
    Messages: 5,954

    Anybody else seeing these bastards yet? We sure have. About one inch long when stretched out. Been treating nearly full grown grubs all week (some involved severe damage that has been going on for a while -- central Iowa) I'm figuring they are probably June beetle larvae rather than northern mask chafer or jap beetle larvae.
    What is your favorate curitive insecticide? Any other reports? (gotta keep your land grant universities informed)

    rscp, thanks
  2. Ric

    Ric LawnSite Fanatic
    Messages: 11,969


    The definition of insanity is repeatedly doing the same thing and expecting a Different Results. Which is typical of TG/CL. Just a Years ago you posted this Thread about the same problem.


    Imidacloprid is still a generic and costs less than $ 18.00 an acre as a Grub Preventive. At $ 89 a gallon it will do 5 acres. Maybe next year you can raise your price so you can afford to not have a Grub Problem, I know you Northern guys have a hard time getting even 1/3 the price per thousand we in Florida can charge. The reason might be that here in Florida they don't give away Certifications.

  3. gregory

    gregory LawnSite Bronze Member
    Messages: 1,081

    i used arena this year b/c it was given to me. this stuff has worked great for both chinch bugs and grubs.
  4. Grandview

    Grandview LawnSite Gold Member
    from WI
    Messages: 3,251

    We could use some grubs. Less than 5% of my customers use a preventative and I rescue 1-2 lawns a year. More grubs would help my sales.
  5. Ric

    Ric LawnSite Fanatic
    Messages: 11,969


    Here in Florida I find communities with Man Made Canals have more grubs problems than other areas. There are reasons for this which I won't go into here. As Professionals with many years of experience, we should know where and when we have problems each year. BMP (Best Management Practices) and the Record keeping is a part of being a PRO ACTIVE PROFESSIONAL. If you repeatedly have the same problems year after year then Life is going to be Tougher for you.

  6. greendoctor

    greendoctor LawnSite Fanatic
    Messages: 10,003

    I do not have seasons in my area. I do have bill bugs, chinch bugs, grubs and webworm though. Never noticed problems in the old days because the common treatment for lawns was diazinon. Yes Ric, that was the go-to product in my area. But with that long gone and the residual from years of soaking lawns in diazinon faded, I have had more soil insect issues. Even brand name Merit 75 WSP is not a bank breaker for me. It is all figured into what is needed on a yearly basis to maintain fine turf. I usually combine Dylox or a "thrin" with the Merit because I am seeing insect activity at the time of treatment. Dylox is another product that takes on a different life if the tank mix contains LI 700. My water pH, is at least 7.5 and Dylox lasts all of 10 minutes if pH is over 7
  7. ohiolawnguy928

    ohiolawnguy928 LawnSite Member
    Messages: 3

    I would suggest using Imidachloprid at 0.3lb.ai/a. I know dylox is the go to, but research shows merit gets more control. The trade off is merit takes 10-14 days vs 4 or 5 days with dylox. That being said a higher kill precentage taking effect a few days later will equal less damage overall. And yes this is also considering putting it down now as a curative, not a preventative. Oh and straight merit is cheaper per acre than dylox.
  8. Ric

    Ric LawnSite Fanatic
    Messages: 11,969


    You don't have to tell me the advantages of Diazinon. Of everything that has come off the Market I miss Diazinon the most. Just today I ran into an old Structural/Termite Guy at Wally World. We were in fact talking about Bed Bugs and other problems. Chlordane, DDT, Lindane and Diazinon are all missed by older techs. Diazinon at one time even had a Nematode rate right on the bag.

    With a average pH 9.5 on my Calcareous Sand, Dyloxs doesn't work real great. While LI 700 is a great acidifier it can't change the soil pH. But the Point here is to be smart enough to learn from past experiences and not have Grub problems every year.


    All the more reason to treat Grubs Preventative. I sorry but at $ 18.00 an acre chemical cost, I can't see not using imidacloprid.

    Do a search about Grub control. There are certain area in a yard where Grubs are more likely to be. A good spray tech knows these area and will either spot treat or be sure to give a good treatment in those areas. Grub Eggs will absorb twice their weight in water over the incubation period. Therefore they need to be laid in very wet but not soaked area. This is generally just above the high water mark. I Blanket treat, but I make sure to pound those Grub favorable ares extra hard. It has been a long time since I had Grub Damage.

  9. americanlawn

    americanlawn LawnSite Fanatic
    from midwest
    Messages: 5,954

    I realize I posted a similar report regarding annual white grubworms about a year ago, but each year is different. Different types of grubworms can quickly wipe out areas of lawns here, so that's why ISU is very concerned. I spoke with ISU entomologists yesterday. They had reports about 3 weeks ago from Iowa goff courses regarding damage from Black Turfgrass Ataenius grubworms, but my report regarding "noticeable injury to turf" was the 1st they heard of.

    I'm figuring it is May/June beetle larvae, but the ISU folks want to know for sure which larvae it is. They need to know the raster pattern (found on the butt of larvae) to determine what rascal it is. To me, they're all the same --just kill 'em with Dylox.

    Raster patterns:

    Jap beetle larvae = V pattern
    May'June larvae = 2 lines
    Northern Masked Chafer = no distinct pattern
  10. DA Quality Lawn & YS

    DA Quality Lawn & YS LawnSite Fanatic
    Messages: 9,280

    Ah yes chlordane - one whiff of that would take the hairs outta your nose.
    Worked though....

Share This Page