Well, it shouldn't be daunting--it's stated as pet safe at even the recommended industrial dilution of 1 to 3 ounces/gallon. Here we're only working with a couple drops per gallon of extremely dilute solution. It's apparently not a very exact science with results all over the place as far as ploidy goes because scales don't develop all their bulblets at the same time and rate. Many bulblets could be undeveloped or over developed at time of exposure to Oryzalin resulting in a mix of ploid types. Identifying tetras from the resultant mix of ploids by existing methods used is not an exact science nor fool proof either. In any case, it would involve a large amount of scales from the same preselected cultivar and lots of pots, time, and ground space with an expected low yield of tetras.
I'm not surprised your orchid growing friend had Oryzalin. I just found out my orchid buddy has been experimenting with it too.
I also expect I'll have to buy another microscope because I do want to use stomata counts as one part of the identification process.
