I grew up on that lake and when they sprayed for weeds in the mid 60’s & 70’s the fish used to float up to the shore dead bloated and slimy. I believe they didn’t know the later affects of the chemicals used back then. It is my belief whatever they used caused all different kinds of cancer in people and those chemicals are still in the mud. Instead of testing the foliage dig down deep in the mud and you will see it’s poison and will remain in that mud and lake for yrs.