Can anyone ID this bottle of??? I found it in the back of a cabinet it looks like I can make out the word aphid but that's about it. Thank you!

It really doesn't matter what it is, it is very likely to be ineffective if used.
If it is a concentrated fertilizer, chemical insecticide or whatever, the label has really degraded from age.
The cap appears to have some corrosion.

Chances are due to the age of the bottle, the effectiveness of the liquid has diminished. So much so it is likely to be ineffective or even dangerous to use.

…and the fact that it is marked as poison leads one to believe it should be disposed of appropriately. In my former life I had a great deal of experience dealing with hazardous waste disposal. Of the 30 states for which I had responsibility California had some of the most stringent rules but the best infrastructure for homeowners. I suggest you check with the San Joaquin Household Hazardous Waste Facility and see if there is still a program for dropping off small quantities of hazmat. There is certainty no way you can safely use the product without knowing what it is or having its application instructions.

Thank you for the replies... BUT... I am curious what the contents was. That is all. The bottle is empty. I have a small decorative shelf on one side of the pumphouse where I have a few old bottles & cans.

Very small bottle for outdoor pesticide. But it refers to spraying and drift. . maybe someone can recognize the label. The brand might say .. black
Googling got me nowhere.

Again I will add, it really does not matter. Judging by the apparent age of the bottle, can we even assume it is even still available? I don't know.

I would just dispose of it ASAP. If it is done properly of course.

Looking at the dark glass - haven't bought any lately, but don't they sell Hydrogen peroxide in dark bottles?

Probably "Black Flag" brand of some sort of insecticide... it doesn't look to me like something worth displaying, but to each their own I guess

Not a perfect label match, but check out these images of Black Leaf 40 Nicotine sulfate solution.

https://www.ebay.com/itm/30427...

Good call on possible Black Flag ("Kills Bugs Dead!") product. Maybe one akin to the bottle at the bottom of this ad?

Nothing wrong with interest in collectibles — it's fun and preserves little pieces of cultural history. Too bad the label is so degraded.
https://www.ebay.com/itm/25417...

I too like a puzzle and like looking at some old things. And this probably isn't even as old as me, and I am not THAT old.. yet.. am I? and it is EMPTY but for maybe traces, and capped. So let's not disparage the NCRAS's interest in it.

does this label look close
https://www.worthpoint.com/wor...

not quite it..

That's the same Black Leaf 40 bottle that I posted, Sally.
I bet that NCRAS's bottle is the same product with a different version of the label.

I'm sorry, Danita, by the time I browsed various pictures, I had forgotten!

Oh, Sally, no need for an apology! I was just chatting, not scolding.

It looks like we have a winner in regard to the bottle ID. I am not sure if it was clear in the photo(s) but I was able to make out what I thought was the word "black" but I did not want provide information that "fresh eyes" bring to ID'ing these sorts of items.

To those of you who helped/attempted to help answer my question, I thank you for your efforts. To the others...

Looks like Black Flag insecticide to me. I used to have a bottle of it back in the old days.

I think the links that Danita and Sally posted for the "Black Leaf" product are quite likely a match