EAB non restricted treatment

[ClimbingTN]

I’ve been reading up on EAB. I’ve found Ash trees near me that don’t seem to have been attacked “yet “. Yesterday, I looked at a white Ash. Too bad it has to come down because codominant split damaged the standing side. If I get the job, I’ll inspect it. A few weeks ago I mentioned in another thread about a small group of green Ash. What’s a good fall and spring spray or drench to recommend. I’m not going to do any work other than a small Ash tree I have in my fence row. The North IPM Center had some good documentation that I could follow. I guess I could just share the link too. If you have a good link, pass it along. Amazon even sells treatments.

 

[ATH]

So you are just treating your own trees - it for hire?

I'd use soil drench Imidacloprid (see below for qualifiers). I use 2F formulation. For trees under 15" DBH use .2 oz per inch of trunk diameter. Mix it with +/- gallon of water (maybe only half gallon for 6-8" diameter trees..). Dig a trench about 2" wide and 2" deep right around the base of the tree....like close enough you have to be careful to not scrape off bark. Slowly poor that mixture into the trench letting it soak in. Spring is slightly more effective than the fall, but fall works too. If EAB is known to be within 50 miles I'd start treating because it's probably there...at least based on how fast it moves through this area (Ohio and Michigan where it was first found.... obviously hasn't been moving as fast for whatever reasons). Repeat yearly. Spring and fall if it's really hammering the area...but that would only be for a couple of years.

Qualifiers for soil Imidacloprid:
Not right next to open water.
No restrictions in your area.
No pollinator pollinated flowers within a couple of feet of ash trunk (we don't want those plants taking in Imidacloprid).

 

[ClimbingTN]

I’ve read up on Imidacloprid. Not for hire, I only have 1 Ash. When asked, I at least would like to point them towards a good source. Then they can decide if they want to do something on their own or look for someone qualified to treat.

 

[ATH]

I do the same (pointing people to options)...and we do a lot of treatments. Some take the advise and treat on their own. More have said "why don't you do that for us."

If you want a good source, this is old (relatively speaking), but still very good:

Insecticide Options for Protecting Ash Trees from Emerald Ash Borer

 

[data farm 26]

I do the same (pointing people to options)...and we do a lot of treatments. Some take the advise and treat on their own. More have said "why don't you do that for us."

If you want a good source, this is old (relatively speaking), but still very good:

Insecticide Options for Protecting Ash Trees from Emerald Ash Borer

Without doing a deep discovery myself, I'm guessing you may know.... are any of these otc options effective?

 

[ATH]

Without doing a deep discovery myself, I'm guessing you may know.... are any of these otc options effective?

The chemical cost for treating with imidacloprid 2F for trees under 15" is under $0.16 per inch of DBH:
$100/gallon = $0.78125 per ounce times 0.2oz per inch = $0.15125

Double the rate for trees over 15" DBH.

It looks like there are some quart sized containers for 1/3 to 1/2 the cost of a gallon. So, roughly double that cost if buying in smaller quantities.

 

[data farm 26]

Cost effective, check.

But do they actually work well when compared to injection with em ben, etc?

 

[ATH]

Yes...the difference is that imidacloprid needs to be applied every year, emamectin benzoate will last 2, maybe 3 years. In really high pressure circumstances, emamectin benzoate is probably a better bet. But we have some pretty big trees where the homeowner didn't want to do injections, so we've been doing soil treatments for over 15 years and the trees are still in good shape. If you wait until you are seeing symptoms, it is going to be harder to expect ideal results.