Copper as a Control

[tshanefreeman]

I am seeking information on copper compounds as a preventative chemical control for fireblight. I've heard of its benefits and want to know what copper compound/spray is used in such a procedure? Any further insight on this procedure or others much the same would be greatly appreciated.

 

[John Paul Sanborn]

Copper sulfate, lime and oil I cannot remember the phenology, but it is when it is cool and damp when the bacteria is most abel to infect the suculent new growth.

Do a search on copper there are several posts.

My understanding is that the timing is real tight to get effective treatment, and of course copper stains.

 

[jimmyq]

Locally the copper product has been changed from copper sulphate to copper oxychloride, not sure why, not sure if it makes a difference in efficacy or not yet. Also, along that vein we ( in British Columbia) have also had our last two systemic insecticides removed from retail sale, the last two were: Latox (aka Isotox (oxydemeton methyl, dicofol and something else)) and Cygon aka Lagon (ingredient 24% dimethoate).