Not in any scientific studies that I can find, I have been researching this for a long time and put the info in a thread that unfortunately is controversial I guess but all the info is here
https://www.rollitup.org/t/if-your-a-new-grower-youre-gonna-wanna-see-this.828754/
Please read the whole thread, I really had hoped to start a conversation about it and well you'll see
The first, and perhaps most important, aspect of harvesting cannabis is knowing exactly when to start chopping down the ladies. A precision harvest is essential for potent cultivation. Growers must be very careful not to cut down plants that are not yet at the pinnacle of resin production, but they must also be wary of cutting plants too late—at a time when THC production has curtailed and resin glands begin to degrade.
There are various methods by which even the most amateur grower can tell when buds are truly ripe for the picking. The simplest and quickest way to know is by examining the pistils, or long hairs, that cover the plant’s buds. At the onset of flowering, these pistils are white and stringy. But as the flowering period comes to an end, they begin to turn color, first from white to orange and then again to a dark red or brown. These color changes signify the maturation of the buds; however, the color and time frame may vary significantly across different varieties of cannabis.
Therefore, a better, yet slightly more complicated, method for determining ripeness is through trichome examination. Trichomes are the actual resin glands that contain THC and other psychoactive cannabinoids, and they are very delicate and easily ruptured. These trichomes are visible on the outside of buds and small leaves and look like little white sugar crystals to the naked eye. However, with the power of a magnifying glass or simple microscope, you can see that trichomes are comprised of a stalk and resin head and are clear or white in color.
As with pistils, trichomes also begin to change color as the buds mature. But in this scenario, a grower wants to harvest buds before they get too dark in color. Even a subtle amber hue in these glands could mean that cannabinoids have begun breaking down and decomposing, which means less potent pot. Using a magnifier between 50x-100x, advanced growers look for a creamy or milky white color in trichomes that tells them it’s time to harvest.
From high times also if u look up scientific research about marijuana trichome development there is many many articals on the subject https://
www.google.com.au/url?sa=t&source=web&rct=j&ei=OZR-U8GbG8nxkQWI8oHgAg&url=http://www.420science.com/files/420-Scope-Field-Guide.pdf&cd=9&ved=0CE4QFjAI&usg=AFQjCNF8zpPzlFg3eeVBybSxhv5-IpA_sA&sig2=TTVvecgyq10xcQsU5QTkog
Hog u seem to have different views then the rest of the world about harvesting marijuana and trichomes all u do is confuse ppl there is solid evidence about trichome colour and functions iam sure u grow great weed man but as a standard way to harvest marijuana trichomes r the way according to 99% of the pro grower and weed journlists and the scientific weed community