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Author Topic: Help with my meyer lemon  (Read 461 times)

Mtlgirl

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Help with my meyer lemon
« on: September 02, 2017, 09:45:14 AM »
Hi everyone,
some leaves on my meyer lemon have develop some yellow patches on the. What do you think could be the reason?
Here are some background:
- I live in montreal canada where we had a very wet and cold summer this year.
- I only water my tree when the top is drying and give some fertilizer once a week (dynagro foliage 9-3-6).
- It had been outdoor all summer and Have been indoor this week because the temperature is going down to 40F.
Where are some pictures



I have inspected the tree and didn t see any bugs. By precaution, I spray my tree with a insecticide soap.
Thank you for your hep

Susanne42

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Re: Help with my meyer lemon
« Reply #1 on: September 02, 2017, 12:53:43 PM »
looks like a fungus? With all the rain I think very possible

matt_citrus

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Re: Help with my meyer lemon
« Reply #2 on: September 02, 2017, 09:15:31 PM »
People have seemed to think this is a form of greasy spot fungus.

Millet

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Re: Help with my meyer lemon
« Reply #3 on: September 02, 2017, 09:45:01 PM »
It certainly does not look like greasy spot

matt_citrus

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Re: Help with my meyer lemon
« Reply #4 on: September 02, 2017, 10:06:30 PM »
I didn't say I agreed ;). But would love a better diagnosis!

Millet

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Re: Help with my meyer lemon
« Reply #5 on: September 03, 2017, 12:16:47 PM »
The symptoms of Mtlgirl's tree look simular to Matt-citrus' tree.

Mtlgirl

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Re: Help with my meyer lemon
« Reply #6 on: September 03, 2017, 01:25:57 PM »
Hi,
I already tried to spray my tree with a fungicide a few weeks ago. Should I spray it another time?
Thank you for all your help

Millet

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Re: Help with my meyer lemon
« Reply #7 on: October 29, 2017, 05:44:33 PM »
Mat, MtGirl said she sprayed her tree with EndAll  which is a Pyrethtrum/soap compound, and it stopped her tree's problem.  See her post, her leaves look almost exactly like yours.

matt_citrus

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Re: Help with my meyer lemon
« Reply #8 on: October 30, 2017, 02:23:57 AM »
Millet, thanks. I did catch that in the other thread. Looks like it has Neem extract too. Heavy duty combo with the pyreth. and soaps - probably takes out the beneficials too. I wonder what it's defeating for the improvement?

Mtlgirl

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Re: Help with my meyer lemon
« Reply #9 on: October 30, 2017, 08:47:30 PM »
Hi Matt, what are the symptoms on your tree? Do you have old leaves falling?

Mark in Texas

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Re: Help with my meyer lemon
« Reply #10 on: October 31, 2017, 08:21:56 AM »
I have inspected the tree and didn t see any bugs. By precaution, I spray my tree with a insecticide soap.
Thank you for your hep


Just some wild guesses here.  I'm afraid of those soaps which are fatty acids of a salt.  I've burned foliage with them and that may be what's going on with yours.  Could be a fungus too, hard to tell.   My go to broad spectrum systemic fungicide is copper sulfate pentahydrate.  MagnaBon CS2005 or the more expensive one Phyton35.

I drenched my citrus with Bonide All Seasons Horticultural Soap yesterday and you would know it - temps in the greenhouse got up to 95F!  Hope there's no damage.  Here's a recent thread on it.  http://tropicalfruitforum.com/index.php?topic=25819.0

matt_citrus

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Re: Help with my meyer lemon
« Reply #11 on: November 01, 2017, 01:09:50 AM »
Hi Matt, what are the symptoms on your tree? Do you have old leaves falling?

Mtlgirl, see images here with similar symptoms:
 http://tropicalfruitforum.com/index.php?topic=25226.0

Mtlgirl

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Re: Help with my meyer lemon
« Reply #12 on: November 02, 2017, 07:43:44 PM »
Hi Matt, did you see any improvement with liquid cop or horticulture oil?
Thanks

 

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