"Klebba" wrote in message
...
I've got 12 hemlock trees infested with woolly adelgids. The local
garden store recommended Bayer Tree & Shrub insecticide and recommended
that I drench them. After measuring the circumference of the trees, also
as they suggested, it looks like mixing one ounce of the insecticide per
inch of circumference for all those trees in a 2-gallon watering can means
that I'll need 6 gallons of this stuff @ $90 per gallon!

My question: is drenching really necessary or can I just use the alternate
method of spraying them at a much lower concentration and expect decent
results? I thought I might drench the ones that are too tall to reach
with the sprayer and just spray the ones I can reach.

John,
Maryland

I have used Safer Soap with good results, and much cheaper.