Return to the Citrus Forum | Post a Follow-Up

 o
Mandarin yellow leaves?

Posted by david_44 10a (My Page) on
Fri, Jul 18, 14 at 16:00

Hi,

We have a semi-dwarf Dancy mandarin in our home garden, San Diego, bought late last year, with a few fruits on it already. Seems it did not growth, leaves turned yellow, see the photo. We water it every week, also regularly use fertilizer like Vigoro's citrus food.

Please help

thanks

David


Follow-Up Postings:

 o
RE: Mandarin yellow leaves?

Classic sign of too much water causing a proliferation of phytophthora, a soil pathogen we have issues with in our neck of the woods. Apply AgriFos (you can buy it on amazon.com, and possibly at Andersen Nursery), 2 Tbsp. per 5 gals. Do a soil drench. Repeat in 4 weeks. Repeat in another 4 weeks. Treat every 6 months, timing the application to be in late winter/early spring when our temps are just right for this fungal-like organism to bloom. If you're seeing mildew, rust or black spot on your roses - perfect temps for phytophtora. Only water if the soil is drying out 18" down. Mulch under your tree to conserve water, keeping the mulch away from the trunk. Make sure your tree is not in grass and is not getting hit by lawn sprinklers.

Patty S.


 o
RE: Mandarin yellow leaves?

Hi Patty, i am curious what characteristic(s) led you to the phytopthora diagnosis. Is it the yellow ribs? The upward cupping of the leaves, or the combination of both? other?
-George

This post was edited by Becauseican on Fri, Jul 18, 14 at 18:07


 o
RE: Mandarin yellow leaves?

Hi, Patty

Thanks for your diagnosis and suggested procedures to fix
the problem.

>Mulch under your tree to conserve water, keeping the
>mulch away from the trunk. Make sure your tree is not in
> grass and is not getting hit by lawn sprinklers.

I noticed there is a small sprinkler under the tree, also the tree is close by our lawn sprinklers. Should we remove the
small sprinkler altogether?

We will try the AgriFos you suggested, hopefully to fix the yellow leaves.

David


 o Post a Follow-Up

Please Note: Only registered members are able to post messages to this forum.

    If you are a member, please log in.

    If you aren't yet a member, join now!


Return to the Citrus Forum

Information about Posting

  • You must be logged in to post a message. Once you are logged in, a posting window will appear at the bottom of the messages. If you are not a member, please register for an account.
  • Please review our Rules of Play before posting.
  • Posting is a two-step process. Once you have composed your message, you will be taken to the preview page. You will then have a chance to review your post, make changes and upload photos.
  • After posting your message, you may need to refresh the forum page in order to see it.
  • Before posting copyrighted material, please read about Copyright and Fair Use.
  • We have a strict no-advertising policy!
  • If you would like to practice posting or uploading photos, please visit our Test forum.
  • If you need assistance, please Contact Us and we will be happy to help.


Learn more about in-text links on this page here