Sara from Colfax writes,
What ratio of water to product do I use to kill tea scale on camellias and what time of year is best to spray?
Per your local cooperative extension office, they would highly recommend treating the camellias with a combination of horticultural oil (for a foliar application treating the undersides of the leaves) and a systemic control product that contains the active ingredient, Imidacloprid as a soil drench at the base to treat tea scale. For timing and specific application times in the year, we recommend contacting the Master Gardener in your county. You can find their contact information by clicking the link below.
Answer last updated on: 10/15/2014