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Use of Merit 75 WP

Discussion in 'Issues, Disease and Pests' started by chadders, Aug 24, 2021.

  1. Aug 24, 2021 #1
    chadders

    chadders Member

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    In the past I have alternated between Safari and Merit 75 WP to control pests. However, recently I lost my notes concerning the dosage of the product for use on orchids. The label is of no use when it comes to orchids. Has anyone used this product? How much do you use per gallon of water for spraying? I appreciate any thoughts. Thanks
     
  2. Aug 25, 2021 #2
    Ray

    Ray Orchid Iconoclast Supporting Member

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    If it has a recommended rate for roses, use that. If not, but there is one for ornamentals, that’s OK, too.

    I have never used the 75% stuff, but the premixed liquid stuff I have used was 1.5% imidacloprid, and I used that at 1 ounce/gallon, yielding a final concentration of about 0.012% in the final concentration.

    That roughly translates to about 0.6 grams of the 75% stuff per gallon.
     
    Last edited: Aug 25, 2021
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  3. Aug 25, 2021 #3
    chadders

    chadders Member

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    Thanks Ray. I knew you would know.
     
  4. Aug 25, 2021 #4
    Marni

    Marni Well-Known Member Staff Member Supporting Member

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    I use Safari at 1/2 to 1 tsp per gallon as per the label. From my notes Merit is 1/10 tsp per gallon. 1 level teaspoon = 1.4 grams Merit 75wp.
     
  5. Aug 26, 2021 #5
    chadders

    chadders Member

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    Thanks Marni, that is helpful.