My lychee (a kind of fruit) seedling that I planted last spring has been fine, except that in the past few weeks, there are patches of brown and orange developing on the leaves. What's wrong? Please check the picture by clicking the link below.

Lychee Seedling

Thanks for any help!

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~Lily

Hi Lily,

Looks like some type of leaf spot. Take a look at these sites to see if you can id what is going on.

http://www.hort.purdue.edu/newcrop/morton/lychee.html#Diseases
http://www.crfg.org/pubs/ff/lychee.html

Green scurf, or algal leaf spot - Cephaleuros virescens
http://www.aces.edu/pubs/docs/A/ANR-0943/
http://chapmanlab.lsu.edu/lab_mainpage/algae.html

Leaf blight - Gleosporium
Look here under 'Synonyms'. Be sure to scroll down to the descriptions of manifestation.
http://www.cfl.scf.rncan.gc.ca/collections-cfl/diseases/indexdisease.asp?ind=G
http://www.cfl.scf.rncan.gc.ca/collections-cfl/diseases/indexdisease.asp?ind=G

Leaf spot caused by either Pestalotia pauciseta, Botryodiplodia theobromae (now known as Lasiodiplodia theobromae) or Colletotrichum gloeosporioides(a form of anthracnose). I suspect it might be one of the last two as the spotting starts at the tip of the leaf and that seems what is going on with yours. Scroll down here to 'Anthracnose' for a description of the manifestation.
http://www.aces.edu/pubs/docs/A/ANR-1212/

From this site:
http://www.hort.purdue.edu/newcrop/proceedings1990/V1-337.html#Longan

quote:

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Anthracnose (Colletotrictium gloeosporioides Penz.) is a problem on 'Mauritius' lychee fruit.

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Hope this was helpful.
Newt

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When weeding, the best way to make sure you are removing a weed and not a valuable plant is to pull on it. If it comes out of the ground easily, it is a valuable plant.