Quote:
Originally Posted by efisakov
It can be soil you purchased. Many times bags with soil sit under the rain (in stores) and aphids lay eggs in it. Once they infect the soil, they reproduce quite quickly (as fast as 6 days). You need to treat soil. Start with letting it dry so the larvae dies. The other things you used will kill adult aphids, but not larvae. Plant garlic in these pots. Peroxide diluted with water kills larvae, but it is to expensive to use on multiple pots.
Wish you luck with it.
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I buy Gnatrol granules and put just a pinch mixed into my potting mix. It's BT colony forming units so you don't need much because they multiply to form a colony once wet. BT kills the fungus gnat larvae, mosquitos too. Perfectly natural.I get it on eBay or Amazon, 8 oz lasts a whole season.