For the last few days, the leaves on my potted citrus trees are looking like scorched. I have these trees for over 10 years and never have any issues with them. All of them have the same issue. Pictures are attached for identifying the problem. Any help will be appreciated. Need to save them ASAP. Thanks.
Welcome to the Forums. The damage may be from mesophyll collapse: Citrus: Identifying Diseases and Disorders of Leaves and Twigs—UC IPM.
Thanks. I guess I will just have to remove the damaged leaves and not to worry. We did have few days of over 100F last week. Maybe just a sunburn. Thanks again - feeling much better after your reply.
It's probably better for the tree to keep the damaged leaves if they're not severely affected; a partially functioning leaf is better than none at all.
Thanks for posting the photos. The sunken and dried areas certainly look like the result of mesophyll collapse.
This is not contagious. Although damaged leaves lost some of their productivity, they are still functioning as a power plant for your tree. So it's rather cosmetic issue, not serious problem. The actual problem is, that your micro climate could be extra hot during heat waves. So better move your containers into partly shaded area in case another heat wave is expected. Local micro climate can easily add another dozen degrees to already hot air temperature. Pavings and nearby walls are reflecting heat and generate hot spots.
