Author Topic: Urgent HELP requested for fruit trees disease identification please!  (Read 2336 times)

Lory

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Hello evereybody!
I live on the island of Cebu - Philippines, just 10°N from the equator and I've several little fruit trees in my garden ( 1-3 years old).
I'm experiencing a terrible attack which is threatening practically all of them.
This year is really hard for plants here.
Because of El-Nino the climate is really crazy. January was raining all the time and since then, until now, we're experiencing several   months of strong drought with unnormally  hot temperatures and sometimes strong wind. Just the end of june and July have been quite normal.
The problem  started with sugarapples and the soursops whose leaves started to crumple and turn irregularly yellow showing dark brown "stains" in the lower side
.




Then same destiny for avocado
The upper side of the leaves shows irregular, asymmetric chlorotic areas with a blotchy mosaic appearance.
The lower side loooks "rusty" with tiny brown dots wich merge in bigger, dark brown areas.
The leaves become at first dull green, then bronze-green then yellowish, they look leathery, tend to curl and sometimes fall down.
Growth is stunted and there are no more fresh buds sprouting.







Same destiny for mango.





And finally lemon started to fall sick  :'(






I immediately suspected a mites attack (I know they thrive with hot dry weather) and I even sprayed the small trees with a special miticide but with no effect.
Actually I've never been able to see any of those small scritters examining several leaves with magnifying lens.
All the trees are planted in "holes" properly dug in the local limestone and filled with good soil.
I water them regularly, I remove all weeds which grow around and I fertilize once in a 3 months with a 12-12-12 NPK product and twice a year with a chelated microelement product.
I'm asking anybody who has any idea to help me please for  identifying and fixing my problem.
I thank you very much in advance for any advice or suggestion!






Lorenzo

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Re: Urgent HELP requested for fruit trees disease identification please!
« Reply #1 on: November 22, 2015, 04:24:46 PM »
Send mo sa akin email mo.

I will email you the description of diseases

Lory

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Re: Urgent HELP requested for fruit trees disease identification please!
« Reply #2 on: November 23, 2015, 05:56:05 AM »
OK thank you!
Lorenzo

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Re: Urgent HELP requested for fruit trees disease identification please!
« Reply #3 on: November 23, 2015, 09:32:43 AM »
What is your source for water?

Have you checked the quality of the water?


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Lory

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Re: Urgent HELP requested for fruit trees disease identification please!
« Reply #4 on: November 24, 2015, 06:31:44 AM »
I always use only rainwater that i collect just for purpose of watering the garden.
i even suspected a boron toxicity but where would it come from? No industries, no chemical plants here....
Anyway, here i've no mean to asses the boron level in water....ironically i'm a doctor chemist but no laboratory here  :-\
Lorenzo

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Re: Urgent HELP requested for fruit trees disease identification please!
« Reply #5 on: November 24, 2015, 08:34:58 AM »
I always use only rainwater that i collect just for purpose of watering the garden.
i even suspected a boron toxicity but where would it come from? No industries, no chemical plants here....
Anyway, here i've no mean to asses the boron level in water....ironically i'm a doctor chemist but no laboratory here  :-\


How close to the ocean are you?
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Lory

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Re: Urgent HELP requested for fruit trees disease identification please!
« Reply #6 on: November 25, 2015, 06:02:43 AM »
I am about 500 meters from the sea in a slightly surelevated (about 20 meters position.
 It's not really ocean it's just an internal sea similar to a lake.
Are you thinking about marine sea spray? Chloride toxicity?
Lorenzo

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Re: Urgent HELP requested for fruit trees disease identification please!
« Reply #7 on: November 25, 2015, 09:20:43 AM »
I am about 500 meters from the sea in a slightly surelevated (about 20 meters position.
 It's not really ocean it's just an internal sea similar to a lake.
Are you thinking about marine sea spray? Chloride toxicity?

Yes I'm trying to rule it out, because the problem your experiencing is not confined to one host plant...seems like everything is being affected
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Lory

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Re: Urgent HELP requested for fruit trees disease identification please!
« Reply #8 on: November 26, 2015, 06:13:43 AM »
Yes, your approach is correct.
There are some plants nevertheless which are still healthy and unaffected, i've for example some quite big Annona muricata seedlings  looking just gorgeous.
I was suspecting some fungal infection or some algal disease but i've no precise  idea..... it's really knocking me down since i love these plants and only God kwows how much time, energy and care i put on them.....
Lorenzo

 

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