Help please, pistols browning and shriveling at day 17 flower

Hey I'm a long time reader first time poster. I'm just coming up on week 3 of 1212 and some of the pistols are shriveling up and turning brown.
I am running 7 brothers Grimm killer queen, 2 humbolt 707 headband and a Jordan of the islands blueberry cough under 480 watts of clu 048 1212 cobs with green planet medi one, massive, and terpinator phed to 6.4. Lights on temps are 25c and have gotten as high as 28c and 20-24c and 45-50% rh. Pro mix hp in 4.5 gallon tubs with dolomite lime. No chance of pollination. Have noticed something nibbling on a few fan leaves. From what I've read, possible russet mites? any help would be greatly appreciated

cannapotimus said:

pollination.

Click to expand...

That's what comes to my mind.

I thought so too but I checked everything over and no sign of bananas. I did have one lady pop a few out last round so it's possible I missed a little pollen while cleaning but I thought I did a good wipe down on everything. If it is I guess time will tell. Is there any other possibilities?

it's the only thing that I can think of with my very limited experience.
It's very easy to miss pollen, it could be in the ventilation system.

the only other possibility i could think of is russet mites. check with a 60-120x scope

Ya I think I'm going to have to pick up a new microscope. I was mite hunting baked the other night and left the light on and burned it out. If it's between the two, I'm hoping it's pollen. Thanks for the help though guys, I appreciate it.

I'm Canadian too legalcanada,maple pride