Organic Treatment For Plumeria Rust

Plumeria Rust aka Frangipani RustSince we had such a mild winter here in Florida, some plumeria trees never went completely dormant and still have leaves with rust fungus. Normally, leaves will drop for several weeks in the winter and by the time new leaves emerge the rust is gone.  But that hasn’t been the case for some trees here in Florida, which have been putting out new leaves that keep getting infected. You want to get a handle on it before it gets out of hand.

First, pick off all of the leaves that are heavily infected. Throw them in the trash along with any that have dropped on the ground. Mix 1 heaping tablespoon of baking soda and 1 tablespoon of Neem oil(or other horticultural oil) in 1 gallon of water, along with a few drops of dish soap (soap helps it stick to the leaves). Using a tank sprayer, spray the entire plumeria plant or tree once a week, especially the new growth. Make sure to spray under the leaves. This should keep the rust under control.

Note: When it gets warmer, do not spray in the heat of the day – Neem can burn foliage. Neem oil is available at Ace Hardware, Home Depot, Lowe’s and other garden centers.

Act Now To Minimize Rust On Plumeria

It’s that time of year again here in Florida. Rust is beginning to make an appearance here in Tampa Bay. It may be hard or even impossible to erradicate entirely, but you can significantly reduce the unsightly damage.
First, remove infected leaves, placing them in a trash bag or sealed container. Don’t do this on a windy day, it will spread the spores. Then spray the trees with a systemic fungicide. Finally scatter a granular fungicide(for lawns) around the base of the trees. These products can be found at Ace Hardware or Lowes. Look for “Bayelton” as the active ingredient. One purchase will last several seasons.
Plumeria rust does not harm the plant, but it can degrade the appearance of your landscape, making your well cared for plumeria look sick. Taking a few easy measures can keep it at bay and keep your plants looking healthy.

Rust Treatment Results – Bayleton

Rust has been a problem for many plumeria growers in recent years. I had none until last summer. I suspect I got it from a cutting or plant I got in the mail. For a long time it was confined to the front yard, which is surprising since the yard is only 80 x 100. Finally it hopped the fence and the plumies in the back yard became infected as well. After reading some message boards suggestions, I tried Bayer Advanced fungus control (which is made for lawns) as well as a systemic fungicide. They both have the active ingredient Bayleton, and I got them from Ace Hardware in Largo, Florida.
First I cut all the leaves off, to prevent reinfestation, it was March so there weren’t many to cut. I sprayed the branches with the fungicide spray. Then I sprinkled it around the base of each plant. I’m a bit paranoid, so I treated again in May. When I get new plants I sprinkle them as well. It is now July, and I am happy to say I am still rust free.