base of branch turning white, soft breaks of easy?

long time no post. but i'm having issues. cant seem to pin it down or just cant word it right for google. i'm in my 8th week of a diesel strain, and have noticed some buds wilting on some plants. first thought was mold but on a closer inspection there was none.
however when i pulled on the branch it just came off where it meets the stalk of the plant. the branch felt soft and had turned a pale or whitish color and seemed like it was traveling up the branch. first time to have encountered such a thing.
i have been running h&g nutes and going off there recommended feed schedule plus protek and super thrive as directed. i water every 10 days and have been using bountea as a tea regimen. humidity flux between 45 and 65 depending on outside teps. 100g water each time i water.
some of the things that have come up are fungus nat larva, stem rot, or fungus rot, but most on the info on those start at the base of the stalk, where as i"ve pulled 5 branches of various parts of the lower to mid section of different plants. i'll have some pics tomorrow as it is late and need to find a plant with the evidence still intact. i can stand to lose a branch here and there, but i cant stand to not know what the problem is. any help is useful......

Sounds like the very same issues I had with an indoor Northern Lite I had to cut down a month ago,,,dip your hands in the soild then stir up the soill a bit,,smell your hand and the soil,,if it smells bad then you may have root rot,,maybe from overwatering,,I tried to get an answer here but no one replied to my question, so I was left thinking it may be that reason,,,the soil was smelling awful and the plant looked stringy, weak, turned color and the leaves were very small and thin,,,I may be wrong with the answer but till someone tells you different,,check it out,,

so this is the best pics i could get so far

over all doing good, think i have a little iron def since starting shooting powder. the pics above show where a bud was or where the issue started, but for the most part this happens at the base of the branch.

Wow.... another great post i should read more often.....

Damping in soil.....
all in your roots,
advise changing of feeding method.
maybe in dna i found that many things attach itself from bacteria growth from cloning.
for instance colo based strain cloned received pm and damping characteristics.
all through life of mother and its baby's.
TRASHED........ BACTERIA growers spread disease......

not banging your source but many methods of watering can promote damping.....

could expand but would take paragraphs and allot of work. will post soon.....

i considered damping off, but the the characteristics are not the same as what i'm experiencing. my soil smells earthy. i also thought maybe i underwater, due to the fact that my plants in the back rows tend to stay wetter longer. everything in the front is semi dry by day 7, and have yet to have a droopy plant from waiting those three days to water everything at the same time. also i've done this successfully for three runs.
now some bacteria that drys a portion of the plant branch and leaves the base where it infects soft and spongey. hmm. some kind of dry rot or some kind of bug maybe burrowing into the branch that causes it. hard to say doesn't seem like this is very common. wouldn't damping effect the whole plant, or a least the wetter ones in the back. most of this where found up front. and if under watering was an issue i would expect this far more prevalent in entire plants in the front rows. maybe my plants are just self purning (not really but wouldnt it be nice) to give more juice to bigger buds. anywho thta as much thinking about this as i want to do, so read you on the up side......