Beginner Gardening: My Thai Basil has brown spots on all the leaves, 1 by tinamartis

tinamartis wrote:
Hi,
I am new to gardening and juyst started 6 months back. I live in South Floria. I planted a Thai basil plant sometime back and it was growing fine until a 3 months back when I noticed light brown spots on the plant. Also the leaves at the top of the branches are shrinking and I noticed this black tiny insects on it. I tried spraying some organic pesticide on it once every few days, but it does not go away. Please help me save my basil plant.