Fan leaves are far more efficient for gas exchange than sugar leaves in cannabis plants. Fan leaves are larger and more exposed to the environment, providing a greater surface area for gas exchange. Sugar leaves, on the other hand, are smaller and more tightly clustered around the buds, which limits their exposure and therefore their ability to exchange gases.
What comes first, chicken or the egg, well when it comes to growing cannabis you might be surprised to find that stomtal conductance comes before photosynthesis.
Doesn't matter how much dli you give her if she can't perform gas exchange efficiently then doesn't matter how much light you give she will just sit and create ROS.
Not saying there is not a purpose to defoliation, there absolutely are times when it can be beneficial to help canopy penetration. Trigger defence mechanisms, etc.
Anything done en mass during flower is detriment if you remove large swathes of leaf.
Lollipop should be done prior to flip giving at least a week to recover. Making sure there is still adequate stomata and big fan leaves otherwise your leaving it all to sugar leaves. Some do all throughout flower little by little.
Whenever a leaf no longer harvests enough photons than it uses the plant will notice and begin programmed cell death, yellowing leaf and remobilozing nutrients before detachment.
At some point later in flower the plant will look for nitrogen, which in a perfect world want to run out in the medium somewhere around week 5-6, this triggers senesceance. This is when the plant really begins to get ruthless with its defoliation.
It's always nice to pretend your doing something important, I recall fondly feeling like Edward scissor hands going wild feeling like a expert defoliator.One thing has remained true from all my attempts at various defoliation techniques and it is this:
The cola that I can't reach to defoliate always, always 100% have been bigger than ones
I defoliate, grow after grow, no exceptions.
You don't strip 30% of athletes lung capacity then still expect record breaking yield.
Maybe I just suck balls at defoliation but that's been my experience with it, hubris of man to think we know better than the plant.