I have been using copper the last couple years but I am thinking if going to sulfur this year. Dormant for stone and pome, and cover spray for pears. Which sulfur are you guys using and at what rate? Are you using just sulfur (ex. Hi-yield) or lime sulfur for both dormant and growing. Here is the lime sulfur I am thinking if getting, but I’m not sure of the shelf life.
These days I mainly do lime-sulfur/oil as my delayed dormant spray… and that’s about it for sulphur. I have a big bag of Kumulus DF dry flowable sulfur which I sprayed in the growing season for many years, but it is a pretty weak disease control and requires a great many sprays so I called it quits a few years ago and switched to synthetics. I still have half a bag of it gathering dust.
This thread is great! I have always used just dormant oils only. There was one last used that was called “summer oil.” Should I be planning to spay the new scion wood grafts in the garden before leaf this spring and then again in summer?
Here you go @PomGranny! The horticultural stuff is about quarter strength, so I imagine you could mix the pet stuff in a gallon jug of distilled water (with some water removed) and be in good shape. I went with the Keystone Pest Solutions route but might consider this concentrated version in the future. For anyone trying this, safety first. Gloves, eye protection, possibly breathing protection? Long sleeves and closed toe shoes too.
Hey Drew, do you spray lime sulfur on pome and stone fruit, both in dormant stage,? I bought a container of horticulture lime sulfur to try and control pear scab on my Bartlett/seckle pear tree but don’t really have a plan for it yet,.
Also the plum graft you sent me several years ago is all budded up, pretty sure it’s satsuma. Thanks again
I only grow stone fruit and yes I use it except on Apricot. Pluots seem OK with it. Dormant spray only but it can be used in a lower spray amount for prevention. I use other fungicides that are more directed at brown rot.
For stone fruit I think it’s best for keeping fungal spores off the tree, like brown rot early in the year using the full dormant amount. Also any insect eggs will be killed, like aphids and mites.
Lime-sulfur keeps my grapes fungus free. I would lose the whole crop of grapes without it. I spray when fruit first forms, and a couple weeks after that. Usually 2 sprays is enough.
Pet dip lime sulfur is the same concentration as the garden one! It’s not any stronger. I digger out the pet dip concentration(not easy) and someone who makes pet dip also stated that they are the same(cited by Scott above)
I just bought lime sulfur today as I’m low.
It cost 65 bucks including shipping for a gallon I think it was? You can get a 20% off if you sign up for points and mailing list. I have been a member for a bit
The Grow Organic site
The gallon should last about ten years😎
The bottles of lime sulfur I had wouldn’t keep more than a season once opened. They would precipitate, and setting them in a pan of hot water didn’t help any. Last year I had to go with pet dip, so we will see how it is come spring. (Still winter here in the North.)