Leaves get black spots then turn yellow and fall off. You may also see black scabby areas on new stems

Leaves get black spots then turn yellow and fall off.

*Grow resistant varieties
*remove affected leaves and fallen leaves from base of plant and discard (do not compost)
*avoid wetting foliage when watering
*Ensure good air circulation
*Remove all diseased material and throw away – don’t compost this
*Mulch well around the plant
*Spray with Compost tea to encourage the growth of beneficial micororganisms
*sulfur spray
*neem oil
*milk spray
*spray with 3 tsp baking soda and 1 tsp canola oil in 1 gallon water

• scatter cornmeal around base to encourage the growth of beneficial competing fungi