Today, now that the sun is out again, I'm moving my large pots from the greenhouse and back onto the patio. The plants that were in the greenhouse are looking a bit sorry for themselves after a week of damp air and poor aeration.
Some of the lower, older leaves will need to be removed as they are infected.
To remove leaf branches (petioles), hold the branch about two inches from the main stem and pull upwards ... the branch should snap off cleanly. It is better to remove branches and side shoots by pulling them off without contact with the open wound because a knife or scissors can spread infection from one plant to another.
I'll dispose of old infected leaves and wash hands before touching any of my other plants because I may spread fungal infection etc. to my other plants.
Removing lower leaves (at the right time) helps keep plants healthy and helps air circulation which is also beneficial.