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Brown patches - looked..ton of little worms??

Discussion in 'Pesticide & Herbicide Application' started by meets1, Sep 9, 2013.

  1. meets1

    meets1 LawnSite Gold Member
    Messages: 3,836

    Sorry to pictures. Had a call on a yard. Irrigated. 3 times a week. 20 minutes per zone. Nice lush green grass. Mow height 4 inches. Bagged weekly.

    Brown patches showing up - about 8-12 circles. I pulled back the sod and yes roots are gone and I see a ton of what looks like little worms (nightcrawlers) I pulled sod back further in places and did not see no sign of grub worms or white looking bugs but just a bunch of maybe up an inch long grayish looking worms.

    Ideas? What to control with? In NW Iowa. 97 today but getting cooler as the week goes on. I run PG machines. Thanks for input
  2. Think Green

    Think Green LawnSite Silver Member
    Messages: 2,746

    Armyworm --cutworm?
    Last edited: Sep 9, 2013
  3. meets1

    meets1 LawnSite Gold Member
    Messages: 3,836

    Just not sure. Looking though they seem to be active late afternoon - early evening when I stopped by. Either way what is best control? A granular product or liquid?
  4. jbturf

    jbturf LawnSite Bronze Member
    Messages: 1,470

    are they in the thatch layer or actually in the soil?
  5. Think Green

    Think Green LawnSite Silver Member
    Messages: 2,746

    If they are in the thatch layer, it may well be armyworm but around here they feed in the daytime on surface tissue. Small instars will feed at the soil and thatch line until they mature. Then things get ugly.
    Soft bodied worms isnt hard to control with granular or liquid.
    Posted via Mobile Device
  6. Think Green

    Think Green LawnSite Silver Member
    Messages: 2,746

    You will want to correctly identify these worms as here is different life cycles. One app doesnt get rid of the problem. There will be a second brood in 30 dAys or so.
    Posted via Mobile Device
  7. RigglePLC

    RigglePLC LawnSite Fanatic
    Messages: 13,061

    Could be worms. The spots could be dollarspot. Or red thread. Or necrotic ring spot.

    Compare spots with the disease pictures. Rule out disease, first.
    Doesn't sound like grubs; sod webworms, and armyworms are above ground pests.
  8. meets1

    meets1 LawnSite Gold Member
    Messages: 3,836

    The thing that puzzles me though is that I do not see them (worms) anywhere else in the turf...as I looked and pulled back random areas just to look. Wherever the brown areas are in the turf is the only place I see the worms. Also in regards to that why such random areas?
  9. Snyder's Lawn Inc

    Snyder's Lawn Inc LawnSite Platinum Member
    Messages: 4,530

    Sounds like cut worms Does the area the worms are in is the grass a thin blade and lighter color and round spots and later turns brown I had same thing in a sprinkler lawn was cutworms I found out they show when a lawn has been over water
  10. meets1

    meets1 LawnSite Gold Member
    Messages: 3,836

    Kentucky Blue grass. Areas are slightly green with embedded brown spikes or leaf blades which I assume over a little time causes a larger area and now what I am seeing here today. We did receive 2 inches of rain a few days ago and the irrigation runs like I explained all the summer that way but I would think we have had 90 + degree days for the last 2 weeks. But yes the soil is very moist where I pulled back the turf.

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