My petunias have gotten these white specks on them. I can't tell if they are bugs or if it's just debris. Can anyone tell me what this is and how I get rid of them?
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They appear to be aphids and their detritus - spray with neem oil, or use an insecticide that treats for aphids. If you choose a systemic insecticide, that should keep them away for up to a fortnight; if you use a contact insecticide, or something like neem oil spray, you will probably need to respray more often.