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Non-ionic surfactant at low and high rates

Discussion in 'Pesticide & Herbicide Application' started by RigglePLC, Jul 22, 2013.

  1. RigglePLC

    RigglePLC LawnSite Fanatic
    Messages: 13,721

    Non-ionic surfactant was tested with T-Zone herbicide at several rates. After only 3 hours oxalis leaves were mostly collapsed when surfactant was included at about 1.9 percent, (a very high rate). Spurge was also affected quickly.
    More results coming soon.
  2. RigglePLC

    RigglePLC LawnSite Fanatic
    Messages: 13,721

    T-zone was tested at 4 rates of surfactant. About .3, .6, 1.2 and 1.9 percent. I compared the results on violets, clover, oxalis and spurge.
    No product or surfactant had much affect on violets.
    For clover, oxalis and spurge results at 48 hours were that at .3 percent results were fair. At the higher rates of surfactant the results were all very similar, that is, good effectiveness. Clover had distinct curl and distortion. Oxalis and spurge showed rapid collapse of most of the leaves.
  3. buddee

    buddee LawnSite Member
    Messages: 26

    Not very surprising. Surf AC 820 will burn a plant itself in the summer, its like spraying a sticky oily substance on a plant, and then sitting out in the sun, causes sunburn on most anything. In the case of herbicides - its not a HUGE concern of a higher rate of surf, its mainly insecticides is when you have to keep the surf level down in the summer, with insecticides - i go no more than .25 oz per gal on surf, because as i said, surf itself will burn, and when you are spraying on shrubs - have to be careful then.
  4. foreplease

    foreplease LawnSite Silver Member
    Messages: 2,062

    I use 6 oz per 50 gallons with herbicides and get great results. Until today I never thought about what percent solution that is. Looks like 0.09%, quite a bit less than what Riggle tested and more than what buddee uses with insecticides. Interesting. I do not have any reason to change or experiment. Would consider revisiting that if I ever decided to spray above 85 degrees, which is not very likely.
  5. Skipster

    Skipster LawnSite Bronze Member
    Messages: 1,086

    A couple of questions:

    1) Why use adjuvants with T-Zone?
    The label doesn't recommend it, and it even cautions that adjuvant use could result in turf injury. None of the active ingredients in T-Zone require adjuvants to be effective. Research has shown that adjuvant use does not improve efficacy of the actives in the product.

    2) Why did you choose your particular adjuvant ratios?
    Most products requiring NIS recommend 0.25 to 0.5% v/v. Exceeding that doesn't usually improve efficacy and seems wasteful, aside from the potential for injury.
  6. DA Quality Lawn & YS

    DA Quality Lawn & YS LawnSite Fanatic
    Messages: 9,279

    I use apprx 4-6 oz per acre (one pg tank full) and have never had turf injury. Use Chameleon non ionic.
    I don't spray in temps over 85 or when the turf is showing signs of entering into dormancy.

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