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sooty mold

andyf

By andyf
in DISCUSSING PALM TREES WORLDWIDE

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andyf Enthusiast

andyf

Posted
Posted

I have sprayed every chemical and even pressure washed ,last year I even cut all fronds off but as time goes by cant get rid of it ! I have 3 of these in a group and this is the only 1 with this 5 years in the ground any ideas?

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John Case Grand Master

John Case

Posted
Posted

Is the plant continually in shade? What else can you tell us about it?

Thanks!

John Case

Brentwood CA

Owner and curator of Hana Keu Garden

USDA Zone 9b more or less, Sunset Zone 14 in winter 9 in summer

"Its always exciting the first time you save the world. Its a real thrill!"

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TikiRick Veteran

TikiRick

Posted
Posted

Sooty mold is caused by something overhead of your Hurricane palms. I would bet that another palm or tree overhead is infested with whitefly. The whitefly suck sap from the fronds/leaves of the overhead tree, and then drips sap onto your Hurricane palm. This stickiness then collects dirt and mold, giving your Hurricane palm sooty mold. Solve the overhead problem, and your sooty mold will most likely be solved.

Rick Leitner

Fort Lauderdale, Florida

26.07N/80.15W

Zone 10B

Average Annual Low 67 F

Average Annual High 84 F

Average Annual Rainfall 62"

 

Riverfront exposure, 1 mile from Atlantic Ocean

Part time in the western mountains of North Carolina

Gratefully, the best of both worlds!

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richnorm Grand Master

richnorm

Posted
Posted

I get that every summer where I use tree ferns as temporary canopy. Citrus sometimes get affected as welI. I also attribute the problem to whitefly but don't think it does too much harm to the blackened plant but is clearly unsightly and impossible to remove completely. In our climate it forms a gel in wet weather.

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JD in the OC Veteran

JD in the OC

Posted
Posted

Dawn dishwashing detergent and water will remove it (with a little elbow grease). (I had always thought it was the insects' urine that causes the mold/dirt to develop.)

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andyf Enthusiast

andyf

Posted
  • Author
Posted

these palms are in full sun, nothing overhead at all no whitefly on the property or the new spiral wf either fully sprayed and systemic treated on every palm, ficus, croton, thanks for the ideas

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BS Man about Palms Grand Master

BS Man about Palms

Posted
Posted

Ummm does that mean nothing overhead or not? Generally, the sweet byproduct of plant insects will form mold on it, just as Rick said

Zone 10a at best after 2007 AND 2013, on SW facing hill, 1 1/2 miles from coast in Oceanside, CA. 30-98 degrees, and 45-80deg. about 95% of the time.

"The great workman of nature is time."   ,  "Genius is nothing but a great aptitude for patience."

-George-Louis Leclerc de Buffon-

I do some experiments and learning in my garden with palms so you don't have to experience the pain! Look at my old threads to find various observations and tips!

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realarch Grand Master

realarch

Posted
Posted

Jerry and Cindy Anderson turned me on to this product called 'PureSpray' Green by Petro Canada. I have palms planted under a bottle brush tree

and the fronds were literally black from the residue. I sprayed a couple of times and honestly the black film just dried up and shattered like glass and fell

off. That was back in April and I've not had to reapply. Great stuff and a general pesticide for a number of different things. I bought a 2 gal. container

which seemed pricey, but it's concentrated and actually turns out to be rather economical.

Tim

Hilo, Hawaii

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Gonzer Grand Master

Gonzer

Posted
Posted

No two ways about it, you've got sucking insects somewhere in the vicinity. Laws of physics > no bugs = no SM. Try Neem Oil.

 

 

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Walter John Grand Master

Walter John

Posted
Posted

Ants are you problem. Get rid of the ants and the problem will be solved.

Happy Gardening

Cheers,

Wal

Queensland, Australia.

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Mike in Nelson Rising Star

Mike in Nelson

Posted
Posted

It could be scale.

Oceanic Climate

Annual Rainfall:1000mm

Temp Range:2c-30c

Aotearoa

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Gonzer Grand Master

Gonzer

Posted
Posted

Ants are you problem. Get rid of the ants and the problem will be solved.

The ants are only attracted by the honeydew secreted by the bugs. You need to eradicate the source that attracts the ants.

 

 

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Walter John Grand Master

Walter John

Posted
Posted

Ants are you problem. Get rid of the ants and the problem will be solved.

The ants are only attracted by the honeydew secreted by the bugs. You need to eradicate the source that attracts the ants.

Eradicate the ants and nature will provide the rest. This I have proven at my old garden. I used ant rid powder on the surrounding ants and away they went, I cleaned the existing soot off and all came good. What happens is predators move in thanks to the non existence of ants, it's the old one, two , trick, and it works.

  • Wipe away the soot
  • Get rid of the ants
  • All is good

The End

Happy Gardening

Cheers,

Wal

Queensland, Australia.

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  • 9 years later...
LeeLee6970 Rookie

LeeLee6970

Posted
Posted
On 8/27/2012 at 6:37 PM, realarch said:

Jerry and Cindy Anderson turned me on to this product called 'PureSpray' Green by Petro Canada. I have palms planted under a bottle brush tree

and the fronds were literally black from the residue. I sprayed a couple of times and honestly the black film just dried up and shattered like glass and fell

off. That was back in April and I've not had to reapply. Great stuff and a general pesticide for a number of different things. I bought a 2 gal. container

which seemed pricey, but it's concentrated and actually turns out to be rather economical.

I know this post is old (2012). I was just reading up on the PureSpray & wondered how you applied it to your palm trees.  Did you use a pump sprayer?

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