Originally Posted by humble1
you can put the pyrethrins in your nute mix, but unless you're doing ebb'n'flow with the flow equal to the height of your soil/medium line the aphids will just crawl up to the unaffected area and hang out there. Dunking your whole root mass is the only way for the pyrethrins to be completely effective. IDK why it's more effective without food in the mix; just what I noticed from trial and error.
Ok so the only thing that my shop had in stock was Monterey "Take Down" spray, which is .01% Pyrethrins, 1.0% Canola Oil, 98.99% Inert Ingredients.
EDIT: MONTEREY TAKE DOWN IS NOT EFFECTIVE AND NOT RECOMMENDED.
This stuff was not intented for use as a drench, but I'm going to use it anyway... Do you know what kind of concentration I should use? Or more appropriately, do you know the concentration of the BugBusterO that you were using and how many ml/gallon you used? Thank you for your input by the way, it is much appreciated.