Kyle from Rocky Top, Tn writes
I treated our knockout rose beds with Merit 0.5 G in mid-April, but the mid-June Japanese Beetle hatch in our area this year has been excessive and the beetles are doing quite a bit of damage to the rose plants (especially the blooms). Can Adonis 2F be foliar applied to treat the existing beetle infestation, or should a product with an active ingredient other than Imidacloprid be used since Merit has already been applied as a systemic treatment earlier in the season?
If beetles are an issue now it would be recommended to treat the foliage directly with something like Talstar P, taking care to avoid spraying the blooms. While Adonis 2F Insecticide/Termiticide could be applied to the foliage, Talstar will have a faster kill as it does not have to be absorbed by the roses. Insects just have to contact a treated area long enough to receive a lethal dose.
Answer last updated on: 06/22/2018
