Question
I have knockout roses I live in south Louisiana lots of rain and humidity, my roses have some black spots and the leaves are turning yellow and falling off.  Is there any hope?  I spray with Spectracide Immunox Plus Insect & Disease, it doesn't seem to be helping with the falling off of the yellow leaves.  Help!

Answer
Your spray should have helped keep the Black Spot fungal disease under control. If it hasn't, then it sounds like you are having ideal weather conditions for it and the odds are against you. If you can just clean up the dropped leaves and put up with the sad looking roses, they will perk up and come back much better when the weather cools down. Roses are able to produce three sets of leaves so your roses will not die when all the leaves have fallen off.