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Mould on Ripening Avos  RSS feed

 
                                
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Hi all!

I'm currently in Durban staying at the home of an unfortunate Avocado tree.  It is a quite mature tree of 10+ years, and just this year the ripening avos on the tree have all developed a spotty white mould.  Is there anything that anyone know which can treat or prevent such a disastrous thing!

Cheers ya'll!
Ty Ty
 
gary gregory
Posts: 395
Location: northern california, 50 miles inland from Mendocino, zone 7
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Can you wipe it off?    Or is it through the skin?      When you cut one open, what do you see?    Is the tree dense with foliage?  Lots of rain this summer?   
 
                                
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The white mould can be wiped off, but there is raised brown bumps underneath the white.  These brown bumps are somewhat like legions and penetrate very shallowly under the avo's skin.  The flesh is green as an avo should be, though there is some redness in the flesh on seemingly random spots.  We suspect there are worms laying their eggs under the skin, but the worms only come after the avo has fallen and has been on the ground for some time.

Some of the leaves of the avo tree have some yellow spottage on them, almost like bleach has fallen onto them.  Also, there are two large staghorn ferns growing on the tree near the base.  Early in the tree's life, a few branches were pruned near the base.

There hasn't been any dramatic changes in rainfall this year and the weather is quite usual.

Let me know if you have any ideas.  Sorry I can't get a picture to you!

Best,
Ty
 
gary gregory
Posts: 395
Location: northern california, 50 miles inland from Mendocino, zone 7
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Major diseases of avocado are anthracnose, downy mildew and powdery mildew. In some specific areas soil-born fungal diseases can be serious. The occurrence of Phytophthora cinnamomi has been recorded, but it does not appear to be a serious problem.



I like the suggestion of milk or even diluted urine as on organic control discussed in the following website.
Good luck!   Avocados are my absolute favorite food.

http://www.simplegiftsfarm.com/powdery-mildew.html

Edit:  One more possibility,

http://www.ipm.ucdavis.edu/PMG/r8101411.html




 
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