Asked November 22, 2015, 10:06 AM EST

Hello Again, im having some problems with my poinsettias stock, now appears a weird signs in the leaf. I dont know what really is? Seems to be heat or humidity problem.

Help please. is it a Disease? Insect? Weather condition? mecanic damage?

Outside United States

1 Response

I wonder if this might be the beginning stages of poinsettia scab? Colorado State has some nice images of full-blown disease here: http://www.colostate.edu/Depts/CoopExt/Adams/gh/p_scab.htm.
Are you using a growth regulator? Chlormequat chloride can cause phytotoxicity and leaf deformation. So can foliar application of some fertilizers , especially those high in phosphorus.