What are you trying to accomplish?

The answer to your question will be on the label of your product. There are several different formulations of Kocide....I don't know if any are appropriate as a drench or not.

Copper sulfate as a drench is used to correct copper deficiencies in plants or the animals that feed on those plants. I don't think that copper hydroxide works that way.

Regardless, look to the label for all suggested uses. If, after reading carefully, you still have questions don't hesitate to call the toll free number on the label. Pesticide labels are legal documents

I'd be very careful with a compound that is known to kill roots.

I need a non-spray fungicide. Actually i just found this on google:

http://www.certisusa.com/pdf-labels/Kocide3000_label.pdf

if you scroll down to "tree crope" you'll see it's used as a drench for "collar rot, crown rot". I take it means the tree roots take up the kocide (this is kocide 3000) and route it up to the tree crown?

No. That is not the correct interpretation at all. Crown rot is also called collar rot.....when wet soil conditions cause rotting of a plant stem at ground level. It's primarily caused by phytophthora, a soil borne pathogen.

Kocide is not translocated.....it's a contact killer.

I know that you have Kocide on hand, but can't be used the way you want. It simply won't be carried from the roots all the way to the top of your tree.

It would be VERY helpful for anyone trying to help you if you would tell us:

1. What kind of plant you are trying to protect/cure
2. What disease you are trying to prevent/cure
3. Your general location
4. Limitations....why can't you spray, for example

rhizo - thanks! I really appreciate your taking the time to help me.

1. Five thuja orientalis trees in a hedge. Height about 7 feet.

2. Fungal - The colour of 3 of the trees has turned pale straw yellow. Two more are partially pale yellow. Tips of some branches have turned brownish and burnt-looking.

3. Israel, coastal plain. Hot and humid zone 9-zone 10 kind of place. Today we have a heat wave 102-103 F, but this is just occasional.

4. Can't spray. The hedge is too close to my neighbours.