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Spraying in the Rain

Discussion in 'Pesticide & Herbicide Application' started by bob, Apr 6, 2001.

  1. bob

    bob LawnSite Platinum Member
    from DE
    Messages: 4,260

    Last week we had a rainy day that was pedicted to drop 1.5" to 2" of rain. To my surprise, Chemlawn was spraying in this down pour. Common sense would tell you to give it up when your in a hurricane, but I guess that mighty dollar overides their common sense.
  2. greens1

    greens1 LawnSite Senior Member
    Messages: 352

    Why even spray, just pour your chem down the storm sewer and have done with it.
    Jim L
  3. David Gretzmier

    David Gretzmier LawnSite Gold Member
    Messages: 3,645

    If you are spraying a clean lawn ( no weeds ), and putting out pre-emergent in your spray, I can see it happening. Dave g
  4. Skookum

    Skookum LawnSite Senior Member
    Messages: 675

    I watched a TruGreen ChemLawn applicator spray in a downpour a few years ago. I was finishing up mowing when it started to rain heavy enough for me to get in the truck and wait till it slowed just to be able to load the mower. He pulled up, got out in the downpour and began spraying. He was there at least 20 minutes spraying and the rain never let up. To top it off, the entire app was applied to a sloping tract around a pond!

    I wish I would have had a camera that day!
  5. greens1

    greens1 LawnSite Senior Member
    Messages: 352

    I'm afraid that I don't agree with you David. With that kind of rain the ground becomes supersaturated, it wont absorb any more water or chemical, so where is your chemical going? Right down the drain, that's where. The other possibility is that when the water pools on the lawn, along with your chemical, you will end up with a 5X rate in one spot and no chemical in anouther spot. If you have a schedual that is so tight that you need to spray in a downpour then hire more people or charge more. Irresponsable spraying can only result in tighter regulation and more laws regarding pesticide apps.
    Jim L
  6. powerreel

    powerreel Banned
    Messages: 481

    In Seattle you have to spray in the rain sometimes. Root aps do okay, and I'll drop foliar if we are in pop-corn rain showers, not herbicide but PGR's, this too seems to work well in the rain http://www.rootsinc.com/applications/T_Fe8.pdf
    I will add some dish soap into the mix also on rainy days.
  7. David Gretzmier

    David Gretzmier LawnSite Gold Member
    Messages: 3,645

    I wouldn't spray in a downpour. but look on your labels. Almost every product we use recommends water soon after app. maybe 24, 48 or 3 days, but that rain can be your friend. I would rather spray pre and fert in a sprinkle than msma and no rain for a week any day. dave

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