Formula for dormant oil?

[BIOGRASS]

What is the formula you use for dormant oil?

If you do not use dormant oil what do you use instead?

Lemme know...

[phasthound]

What is the formula you use for dormant oil?

If you do not use dormant oil what do you use instead?

Lemme know...

I apply horticultural oil at 2-3% depending upon time of year. I stopped using the term dormant oil many years ago because it can be used throughout most of the growing season.

[upidstay]

Depends on the pest and the season. Had some hemlocks that were heavily infested with Wooly Adelgid, mites, and scale. Used a 5% solution spring and fall, plus fertilization and merit. (the trees were in BAD shape) They seem to be recovering nicely. Most of the time I go with a 2 or 3% solution. Other than that, I like M-Pede soap for just about everything.

[RAlmaroad]

I treat a lot of fruit trees and go through those 1/2gallons very quickly. Do you know the make up of the horticultural oil? It looks like mineral oil and a surfactant.
Upidstay- I like that insecticidal soap (M-Pede). I think it has some potassium salts in it also. In the old days, we used to spray a white-wash of pure lime and water to fruit trees. I think it was helpful on the bottom.

[phasthound]

Depends on the pest and the season. Had some hemlocks that were heavily infested with Wooly Adelgid, mites, and scale. Used a 5% solution spring and fall, plus fertilization and merit. (the trees were in BAD shape) They seem to be recovering nicely. Most of the time I go with a 2 or 3% solution. Other than that, I like M-Pede soap for just about everything.

I used to run an operation that treated thousands of hemlocks for the above mentioned pests I stopped using Merit on hemlocks because there was usually a mite outbreak in a year or so. I also stay away from high N ferts as many insects love the flush of new growth.

This site talks about uses & make up of horticultural oils. http://www.ext.colostate.edu/PUBS/INSECT/05569.html