I have taken in a lot of plants recently. Many of them came with some bugs, specifically scale. After several spot applications of Bayer’s 3-in-1, I decided to apply Merit, which is an insecticide that is applied as a drench, and the plants take through the roots, producing an environment that is not conducive to insects. Merit contains the systemic insecticide Imidacloprid (75%), which is known to work well for mealybugs and scale.
I normally have applied Merit at six month intervals (November, April), but decided to apply it early this year to catch the bugs before spring comes.