We should only use pest control when absolutely necessary. It's best to have a healthy mix of good and bad bugs in the garden. When you fight off all the bad bugs, the good bugs will leave your garden in search of food (lady bugs being one of them). So only use pest control when the good bugs and birds are losing the battle.
Wakeup World posted a great list of Organic Pest Control Remedies to help arm us.
I hope you find this information helpful.
~ Happy Gardening ~