Bactericides and Fungicides

[ATH]

What kind of soils are you dealing with? do you know what time of year there were doing those treatments?

I don't know that I have seen any publications about soil types but I can imagine sandy soils do not hold the Imidacloprid long enough For the tree to absorb it well.

should also note that trees that have started to decline are not going to do as well with soil only treatments. so that may have been a factor?

 

[Acerxharlowii]

We have pretty good soil in se wisco. More clay than Sand and silt but pretty decent. It may have been the trees being to far gone. You used imidacloprid?

 

[Acerxharlowii]

What rate?

 

[JD3000]

2F labeling is up to 0.2 oz per inch up to 15" and 0.3 to 0.4 oz per inch for over 15"

 

[ATH]

What rate?

2F labeling is up to 0.2 oz per inch up to 15" and 0.3 to 0.4 oz per inch for over 15"

What he said.

I've always thought 2F the easiest to proportion. At first it was only labeled at 0.2oz per inch. Pretty soon after EAB started hitting, researchers were finding that not effective, but 0.4 was for the bigger trees.

There was nothing labeled for that higher rate. As long as you didn't go over the labeled rate per acre per year, you could make 2 separate applications of 0.2 oz per inch and still be legal by the label. I asked an ODA regulator what a constituted a separate application. He wasn't entirely sure. There may have been a year when there were 2 consecutive, but separate applications made on some larger trees after the research was published but before the labels changed.

Then Zytect was the only one with the 0.4 oz label for a year or two. Now they all have it. I used Zytect for those couple of years, but have been using Quali-Pro (from Midwest Arborist Supplies) every other year and since.