0
points
What is the cause of the discoloration of the leaves and what should I do?

Hazelnut (filbert)    None Given

Since the trees were planted 6 months ago (in the Southern Hemisphere) the leaves have had brown edges. The trees have definitely been receiving enough water. In fact I'm more concerned that the roots may have had too much water because the soil was unusually moist throughout our southern hemisphere summer. I'm watering less now. Otherwise the trees look ok with catkins appearing and new green leaves appearing as well. Though the overall growth of all three planted trees seems slow. I can post some photos if you like. Thank you, Jack.


Posted by: Jack (2 points) Jack
Posted: April 30, 2016


deactivated commented,
Hi Jack - can you clarify what exactly your question is? Also, yes, some photos will be very helpful. Many thanks
over 2 years ago.



Answers

0
points
It looks like potassium deficiency. The symptoms include leaves show characteristic marginal scorching (bronzing) and may show necrotic (chlorotic brown) spots in between the veins.

You can apply recommended quantity of muriate of potash or wood ash.


Posted by: Dr. Ravishankar Narayana (6 points) Dr. Ravishankar Narayana
Posted: May 2, 2016


Jack commented,
Thank you Ravi. I'll go and get some. If these identical features appear on other plants does that also suggest a potassium deficiency? For example on rose bushes? Jack
over 2 years ago.

Dr. Ravishankar Narayana commented,
Yes most of the potassium deficient plants will have similar pattern of symptoms i.e., marginal scorching (bronzing). Please see the attached plant nutrient deficiency guide for more information. http://www.mgofmc.org/docs/nutrientde...
over 2 years ago.

Jack commented,
Dear Ravi, Thank you for that helpful information and those very useful looking charts! I've bought some potassium sulphate powder, dissolved it and watered the prescribed amount around the hazel nut trees. It rained last night so that should get it into the soil. We'll see what happens! I've also added an image here for something quite different. Perhaps I ought to give it a separate post? We've grown some butternut pumpkins. I'm puzzled by the brown and rather curious looking mottling on one or two of the pumpkins. Here is the picture - a mottled pumpkins next to a normal one. What do you think it is? Jack
over 2 years ago.



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