I am looking for a place that will conduct a soil sample. My Japanese Maple tree has lichen on some of its branches and I read it could be due to the soil.

Hello, I mistakenly applied systemic Bonide insecticide granules not for edible plants to a small citrus tree (calamondin) that I keep as a houseplant. I'm wondering if fruit from this tree is now poison forever, or if there's a time frame after which the systemic will no longer be dangerous to humans. The active ingredient is imidacloprid 0.22%

I applied approximately 3 tablespoons of granules to approximately 5 gallons of soil (less than the recommended 2.5 tablespoons per gallon). The tree's trunk is about 1 inch in diameter.

I applied the granules 5 weeks ago. According to the instructions, the systemic is supposed to be effective against pests for up to 8 weeks, but for how long does it make the plant toxic after that? Where does systemic insecticide become most concentrated? In the trunk, leaves, or fruit?

There were about a half dozen immature fruits on the tree when I applied the granules 5 weeks ago, and they are now starting to ripen. Is it possible those fruit would be safe to eat if they are ripe in another three weeks? What about fruit that grows in the future?

I'm hoping you can provide some info about whether I've effectively ruined our fruit tree forever, or if there is a chance it'll be safe to eat its fruit in the future.

Thanks very much for your time.
Best,

Susan