Thanks, for the suggestions.
Does it comes with an expiration date?
So I assume it can be use on other trees? I have a pear tree that has started to get some branches affected by some black disease as well. I had to cut one of the branches way down to stop the spreading to the whole tree. And had to pug one of my mangoes from what it seems the same problem in the process to save the ice cream tree I lost my LZ graft. 
Pear and Apples are affected by fireblight that causes blackening and death of branches, even see liquid running down from top. Although they say there is no cure for it, Argifos should be sprayed be bud break stage in winter and before flowering to kill bacteria. I sprayed this year on apples and will let you know if it helped.
I could not find Argifos on amazon..... I did find Agri-Fos available on amazon...
Here is a easy to read pdf of Agri-Fos for various trees being usually mixed per 1 gallon.
Read application methods for various crops::: 1. Spray 2. Trunk spray 3. Injection 4. Pre-plant dip 5. In furrow-spray 6. Basal Bark Spray 7. Soil drench 8. Soil Incorporation 9. Bare rooted dipping of transports 10. Tree Injection.
This is a direct pdf with no adds as of this moment....
https://www.domyown.com/msds/agri_fos_systemic_fungicide_suppl01.pdfEx. COCONUTS
Use AGRI-FOSÆ Systemic Fungicide for effective control of bud rot and nut fall in
coconuts.
Injection 1/3 to 1 fl. oz.
per tree
Dilute AGRI-FOSÆ Systemic
Fungicide with water to give final
injection volume of 1 fl. oz. to 2 fl.
oz. of water and AGRI-FOSÆ. Inject
into the trunk or root system.
Many other Tree Landscape Applications usually at 1/2 tsp per tsp. water :::: Drill holes 3/16 inch (5 mm) in
diameter into live sapwood (depth
dependent upon age of tree) with
downward angle into trunk uniformly
around the tree circumference, using
a slow drill. Do not inject into areas
of obvious decay, canker or
mechanical injury that appear on the
tree trunk. Calculate the amount of
product required by measuring the
trees by one of the following 3
methods, and use the highest
calculated number of injections. 1)
1 Injection per square yard of canopy;
2) 1 injection per yard of diameter of
canopy measured at the dripline; 3)
1 injection per 6 inches of trunk
circumference measured 4 feet
above soil level. Make injections
with applicators that maintain
positive pressure differential such
as ChemJetÆ, SidewinderÆ, Agmurph
GunÆ, MarleyÆ Injector, or
hydraulic applicator type equipment
that forces solution into the sapwood
of the tree.
Avocado tree injections: Root rot (Phytophthora
cinnamomi): Skeletal trees
1st year: 1/4 fl. oz.
undiluted product
per yard of canopy
diameter.
Other situations:
1/8 fl. oz. diluted
with 1/2 fl. oz. of
water per yard of
canopy diameter
Inject trees at spring flush maturity.
Repeat treatment in February or
March. Drill holes 3/16 inch (5 mm)
in diameter and 1 inch (25 mm) to 2
inches (50 mm) deep with slight
downward angle in trunk. Place
syringes in the main trunk of the tree
and space evenly around the
circumference of the trunk. Suitable
for use with Chemject tree injectors,
Ag-murf gun, or hydralic tree
injection. Do not prune back trees
before injection process as burning
of new growth may occur. Do not
inject trees in winter months. Do not
cut the canopy of injected trees. Do
not add any material, other than
water, to AGRI-FOSÆ Systemic
Fungicide by trunk injection. Do not
inject more liquid in a lesser number
of syringes than directed.
A lot or experiments for all to possibly attempt if you have the time
Current lowest price on ABOUND fungicide 1 Gallon that I could find is ebay free ship no tax in my state $215 per gallon
https://www.ebay.com/itm/Abound-Flowable-Fungicide-1-Gallon-22-9-Azoxystrobin/122009682367?hash=item1c685801bf:g:9VgAAOSwgQ9VoAak
