I live in Southern California and am looking for homemade and/or organic recipes for pests. I have several for blackspot, rust, powdery mildew but am coming up short in the pest area, particulary aphids. I don't want to send away for any products. I have heard of a mixture of 1/2 listerine and 1/2 water, has anyone tried it? Is there anything else someone else has tried and been successful? Thank you!