I've used Lady bugs myself. This was a method that I found to work very well.
Spray if you are going to spray the plants. Then wait 2 or 3 days and spray again. If you use a safer organic bug killer there might be some of the baddies left over because they aren't always as efficient as other products on the market. This is where the lady bugs come in. After I spray the second time, I usually wait another 24 to 48 hours... And then I release at least 15 to 20 lady bugs per plant.
Ideally you want these thing to survive as long as possible because the larvae eat more than the adults.
Good luck, happy growing! From here on out, hopefully no pests!
Thanks for your comments! The only thing I ever foliar spray with is compost teas & an occasional mild fresh aloe/essential oil solution if needed. No chemicals!!!!! & most everything is managed via predators I have in my dirt.
Yah back in 2002 I had a smallish crop of tobacco in my backyard in Renton. The flea beetles were pinholing the lower leaves until an army of tree frogs moved in and cleaned them out. then dragonflies went on patrol to catch caterpillar laying moths.
Circle of life makes for the happiest plants :)
That's the best way to go if you can. Currently I am growing indoors and stick mostly to Neem myself. Although it's definitely not the most efficient thing to use... It helps if used regularly.
I also am a huge fan of Mantids, but most of the problem pests for cannabis are too small for most mantids to be interested in. Still very cool pets. :)