Can anyone help why my Tulsi (Holy Basil) plant has the white thing and how I can fix it?
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This plant has white fly. The definitive test between this and powdery mildew which is also white is that if you shake the plant some of the adults will fly off. I normally recommend 5 ml dish soap to 1 liter water sprayed or rubbed on the leaves. Apply three times every 5 to seven days.
If you are using this plant for cooking having soap residue on the leaves will give it a bad taste so I recommend: