We have had this jasmine for over 20 years. It is getting new growth but has flat cream colored splotches on the bark and is spreading. What is it and how can I treat it? Photo attached. We live in Redmond, WA in zone 8. Thank you! Pami Girsh

Powdery mildew on the jasmine's stems look as if they have been sprinkled with a thick coat of baby powder. The powdery substance is made up of spores and is a type of mycelium. As the weather gets a little dryer it should go away. However, it the conditions stay wet for a long periods of time the mycelium will bloom and spread.

I see no similarity to powdery mildew, except that it is white. There are many thousands of white fungi. Luke, what makes you think it is powdery mildew???

Thank you for your replies! I don't think it's powdery mildew - I have seen that on other plants over the years but this is not "powdery ". There is nothing on the leaves and it takes my fingernail to try to scrape it off. It's only on the bark. I'm stumped. I sure would appreciate any other suggestions. This plant has always been spectacular and we'd hate to lose it. It does have the black mold that I always have to wash off every year but that's all it's ever had. Thanks so much for your help!

Thank you for your replies! I don't think it's powdery mildew - I have seen that on other plants over the years but this is not "powdery ". There is nothing on the leaves and it takes my fingernail to try to scrape it off. It's only on the bark. I'm stumped. I sure would appreciate any other suggestions. This plant has always been spectacular and we'd hate to lose it. It does have the black mold that I always have to wash off every year but that's all it's ever had. Thanks so much for your help!