What is this white stuff on my peach trees?

[Sara_in_philly]

@Drew51 Thank you for all the information! The retail label of lime sulfur is very useful, thank you!

I did some digging about lime sulfur as pet dip and got different conclusion. I think the pet dip has the similar strength as the one for plant . I know you don’t use pet dip, so this doesn’t impact you, but I will put it here anyway in case others may want to consider using it.

Lime sulfur pet dip label says sulfurated lime solution 97.8%, but it doesn’t say what’s the strength of the solution. Further digging found in one place that states the solution is calcium polysulfide 25g in 1000 ml. So pet dip is not stronger than the one for agriculture.

As I write this, I did another search and found another thread that confirm this:

@Vanna1978

I manufacture the lime sulfur solution. The information stated on the ingredients is only the solution as a whole and the inerts are the sediment or impurities. The calcium polysulfide (real part that works) in this concentration is the same as the 29% solution you purchase for plants. I hope this helps.

I think I will just go ahead and buy the 2.5 gallon lime sulfur from the place you mentioned. I have some large ornament trees that could use some anti fungal spray.

Thank you again for your help!

Merry Christmas and Happy New Year!