Last minute captan spray?

[mroot]

Captan breaks down in water that is basic. Normally city water is basic so pH adjustment is required. See this post for details of why pH adjustment is important and how to do it.

First Enterprise apple

Well bitter rot and scab can be controlled by captan. I have attached a link for a short article on apple scab control from Purdue University. It discusses using captan and other chemicals to control it. Since captan also works on bitter rot it would be a good choice for you. The main disadvantage of captan is it breaks down quickly when you add it to water that has a pH above 7. So in many cases you will need to lower your water’s pH before adding captan. Well water or city water is often…