I don't believe the rot is actually a fungus - more of a bacteria possibly. If you lost a lot of them this winter I would say they were too wet and /or too cold during winter. Sometimes they get too dehydrated, but in zone 10 I'm thinking your winters are not that long for them to be affected by that. Just my 2 cents and sorry you lost so many plumies :(

This post was edited by elucas101 on Fri, Mar 29, 13 at 13:25

I think it can be used to combat leaf based fungus related to wet, high humidity, and hot temps. I do not think it will be effective against rot.

I supposed you could introduce it into your routine late in the summer season so there is a supply of anti fungal in the plant that is being prepared for winter storage and see what happens. Much like many people introduce silicone supplements for winter.

I used Fungaway spray and crystals, basically to prevent Black Tip on my Singapore White. The spray worked better then the crystals but I know the spray is banned because it had Bayleton in it, not sure about the crystals. As long as I sprayed it helped keep the BT away but if I stopped within a week Id get BT. The thing about some Systemic Fungicides are they smell potent and caustic, so maybe the Fungaway killed the mites that were causing the damage on my Sing White (supposedly mites are to blame for Black tip according to several experts).
So if your trying to prevent winter rot you may want to make sure its not bacterial, also remember most systemic fungicides smell worse then some pesticides like Malathion so you will have to store you plants somewhere ventilated and away from people and pets..

Good Luck

People use systemic fungicides to prevent rust on the leafs, especially in the fall. It does not work on black tip or on rot.

George

Thanks for the replies. I believe I lost so many this winter due to a combination of many reasons.

They were uprooted from the ground in October where they were very happy. They were moved 350 miles north which is a different zone.
With disturbed roots, they got a lot of rain in October and one night it got cool while they were wet. I then moved them all into the garage to dry out for the winter. I'm not used to babying them in the winter. In the Keys, they are fine all winter long in the ground.

I think some of the tips were resting against the cold garage walls. The garage never got below around 57 degrees and a fan circulates the air.

Most of the ones I lost were youngsters, 1 or 2 year old rooted cuttings. Many of them were Thai cultivars and some of them are known to be prone to black tip and hard to grow. THOSE, I do not intend to replace.

In fact, I probably will only replace maybe 3 that I lost and instead get larger, more hardy trees since I now have to move them in each winter.

My list of losses grew when I moved them outside yesterday and noticed 2 more missing, ones that must have rotted and I forgot to catalog them.

However, I did find some I didn't know that I had. Duplicates, but still 3 surprises. One is a beautiful compact tree, a bright rainbow that was given to me by it's owner from a tree in the Keys. It roots almost overnight, is very hardy, blooms constantly, such a nice tree.

The other was a Japanese Lantern that Emerson Willis brought me. Also a gorgeous extremely fragrant coral pink that I collected from a tree in the Keys.

My updated winter of 2012 loss list:

BALI WHIRL
BLACK PURPLE
BLACK TIGER
CHOKKA DELIGHT
COMPACTA PEACH
COOKTOWN SUNSET
ESSIEâÂÂS FANTASY
GARDENIA
GLADYS âÂÂKâ BRANDT
GOLD COAST PEACHY
KANEOHE SUNBURST
KAUKA WILDER- 2 OF THEM
LILAC CLOUDS
MARY MORAGNE
MELE PA BAUMAN
MIRACLE PINK
MUANG BEDJAPAN
MUANG ONCAREK
ORANGE SHERBERT
PLASTIC PINK
TEXAS AGGIE
THAI ORANGE SPLENDOUR

Oh I should have prefaced that Systemic Fungicides like Fungaway Liquid was recommended for Black Tip back in the early 2000's, Plumeria 101, Extoic Plumeria and many other reliable sources back in the day were using them as a preventative measure and remedy. The more recent school of though from 2007 is that BT is caused by mites. Citizen_Insane stated that systemic fungicides do not work on Rot or Black Tip, but again back in the day systemic fungicides like Bayleton and Fung Away were recommend and in my case it did help control the BT for what ever the reason in my White Singapore but if I stopped using the Fung Away the BT would would reappear right away. So go figure.....

I'm no expert here, but it seems that black tip seems to be caused by stress, so perhaps the stress could come from fungus, mites, shock of cold weather, etc? That could explain why different remedies work for different black tip conditions.