Just wanted to share my experience with Ladybugs and aphids. I build an indoor grow room and finished it in early September. I had started some girls outside a little late, and they were soaking up that free sunlight, but their flowering cycle would take them into the cold, hard weather here in Montana. It was my intent to bring them inside, and that took place as soon as the room was finished. Unfortunately, and unbeknownst to me, my girls had been infested with aphids. I did not even notice them for several weeks, but I began to notice a 'shine' to the leaves, which is the sugary solution the aphids exude and it makes the leaves look shiny, and when I did finally recognize their presence, they had overcome three plants and started on the other.
I initially sprayed a solution of garlic and dish soap and this did help, but the plants were so covered, it was next to impossible to get everything sprayed completely. I did look at other chemical sprays, but after reading the comment about smoking bugs vs chemicals, I decided to say 'fuck that' and look for a more natural solution (the garlic was working, but...). Serendipitously, Ladybugs began showing up outside my back door. I read about using Ladybugs and decided to buy some and see how they worked. Added 1500 to my grow room (enclosed so they cant escape). I could tell the difference right away but there were soo many aphids, I decided to add 3000 more! So 4500 lady bugs working on an aphid population was awesome to watch. I had initially considered throwing out the whole crop because they were so infested, but those ladybugs made a believer out of me. They are simply awesome. They got the aphids under control and there are NO APHIDS left on my plants, only aphid skeletons!!
Today is harvest day for two of the plants, so I will take some pics and post them. The girls did great after the aphids were eliminated although when I post pics, you can still see the aphid skeletons on the leaves...Grow room uses the Advanced Platinum 900W led light, which also work Super!!!!!!
Just wanted to share this experience, for the feeling you get when your plants are COVERED in aphids is a very sinking feeling, but I am here to tell you that Ladybugs ARE THE SOLUTION!!