You both talk science who posted some study's one of them said defoliation increased grape size and flavor I posted some as well that proved it did work timing is the most important factor.
You talk of science yet know nothing of it because science is studying and experimenting to determine results the concept escapes you.
Science should be evolving we would learn nothing if it was static like your closed minds screaming the world is flat when you have been shown it's not.
To be fair, the science in the manuscript you're talking about referred to an increase in fruit production when 1/3 of the leaf matter was defoliated. More stringent defoliation correlated with reduced fruit weight. Taking off 1/3 of the leaf matter is not the defoliation that is being encouraged in this thread.
a.