Can you tank mix calcium chloride with a fungicide such as decree for powdery mildew control? I have a problem with powdery mildew found on a very few plants and I don't want it to get worse. Should I cut out Calcium chloride sprays completely to keep the foliage dry?

Try the link out below....Michael Pawelek
Calcium With Other Chemicals...

Thanks Michael, Is Decree and Heritage still the chemicals of choice at this stage for Powdery Mildew? Would Pipron also work?

CJR - You probably don't need to eliminate the calcium chloride sprays all together because there are some obvious benefits to the sprays. You just want to make sure you are making the applications as early in the day as possible so the foliage has a chance to dry before nightfall.

Environmental controls are very important when you are dealing with powdery mildew. The disease is favored by a large fluctuation in day and night temperatures - make sure you night temps aren't too cool. High relative humidity will also promote powdery mildew. You may think about heating the greenhouse after any type of irrigation or foliar spray. This will help the moisture evaporate up into the air. Follow the heating by venting with cool, dry air. You may need to repeat this cycle several times throughout the day to keep the humidity levels down. Make sure the plants are spaced to ensure adequate airflow around the plants, horizontal airflow with fans will also keep the foliage dry. Powdery mildew spores require at least 4 hours of free moisture to germinate so you can continue with your foliar sprays but just make sure you are taking steps to dry the foliage as quickly as possible.