something is eating my hibiscus
i have 3 hibiscus. brought in to over winter. in Dec, plant was still flowering inside, but then notice flower gone. took pics to zoom in and determined had a bug. researched it and found them to be thrips. bought insecticide to kill as it started eating the leaves once no flower.
Treated a few times and saw no more evidence of physical larvae or adult winged ones.
Leaves continued to disappear and became naked branches, with new sprouts disappearing quickly. bought advanced rose and flower insect killer and insect and disease killer to treat soil and external plant. still no evidence of physical bug but 1 plant especially continues to be "chewed on" even going as deep as internal stem exposure. I have bought some neem oil to try next as I would like the hibiscus to make it for spring. see pics. I live in NE GA. I think plant zone 7