Why is my calyx browning?

Kgunge · Dec 16, 2021

Hello

been a while. Hope everyone’s well.
i came across something funky in the garden. I’m not sure what this is as I haven’t seen it before. The calyx or “pre flowers” almost seem to have a brown colour to them. This is the only plant in the room like this.
week 2 : day 14 of flower
Coco perlite 70/30
DE hps
Daytime :temps 78-81f RH 60-65
Nighttime : temps 65-69 rh 60-70
PAR 650-800 ppfd

growsince79 · Dec 16, 2021

Looks like you are cooking them. How close is the light?

Observationist · Dec 16, 2021

Temps/light to close possibly > nute burn

tobh · Dec 16, 2021

growsince79 said:
Looks like you are cooking them. How close is the light?

literally said this to myself before seeing your post.

those plants are being cooked alive either by light intensity or heat or both. raise that light and get some air circulation around them.

GreenMtnGuru · Dec 16, 2021

Not looking good. What it the white debris on the leaf surfaces when I zoom in?

Upping your humidity and lowering light intensity would be good first steps towards recovery.

Kgunge · Dec 16, 2021

Hey! Woah thanks for all the responses.
the lights are 3ft from canopy. de hps running at 80%. 700ppfd give or take. I didn’t think of it being light burn because the environment checks out to me, or so I thought. Room temp of 78 would give me about a 80f leaf temp in the hps. PPM7 1300 right now getting fed until runoff everyday.
@GreenMtnGuru @tobh @growsince79

tobh · Dec 16, 2021

in that case, start looking for pests. @GreenMtnGuru might've caught this one. possibly something like root aphids, those nasty fuckers will straight destroy crops and require nuclear protocol for treatment.

Kgunge · Dec 16, 2021

my only guess would’ve probably been something in the root zone. Even though I’m feeding twice a day , it still seems that they dry out too soon. This is the first time I’m using a smaller medium. I went from 20 gal fabric pots to 7 gal hand fed twice a day 6 hours apart.
@tobh

tobh · Dec 16, 2021

ah.... my bad i completely bypassed the details on the grow. can you post full plant pics? are all the plants in the grow affected or just this one?

tobh · Dec 16, 2021

even two times a day seems low to me, which could indicated toxicity, or a serious pest infestation. both will present symptoms like this. i would also be curious what your runoff EC is. that will be the tell of toxicity. otherwise, pest issues are very likely. i've not seen such serious nutrient burn in years and am hesitant to believe an obviously competent grower would roast plants that way.

BurnzYzBudZz · Dec 17, 2021

Mites. Scope for mites now. That’s classic russet mite damage. It may be too late.

MeechDGAF · Dec 17, 2021

Looks like russet mites to me.

Kgunge · Dec 17, 2021

Thanks for your responses. I’ll check under the microscope for any pests @MeechDGAF @BurnzYzBudZz and update the post. I just got to work I’ll be doing that soon

@tobh , yeah man I didn’t think that my coco would dry out this quickly in the 7 gal pots. I’m limited to feeding twice a day manually by hand until we get our drip system built. (2 months from now). I wish I could feed more but I have to balance my life with the garden :/ here are some whole plant shots. There was 3 plants out of 50 effected , all 3 were in different parts of the room not near each other. Here are some more photos. It’s so odd that I have some colas on other plants that are 1-2 feet from the hps and they’re doing fine but these couple plants that happen to be shorter in height and further distant from the lights are having this weird yellowing / browning of the calyx and this clawing and crusting of the leaves NEVER seen something like this before. Besides the leaves , where else should I be check with the microscope ? Thanks tobh

Kgunge · Dec 17, 2021

Dang fellas now that I look into mites …. Very similar symptoms. Wow…. I’ll be going under the microscope soon and posting microscopic photos soon.

tobh · Dec 17, 2021

fuck man, i'd also quarantine the affected plants ASAP. get em out of that room if you can. three plants aren't worth losing your entire room to mites.

you'll need to dig into the coco and check the roots as well, again with a microscope as root aphids aren't visible to the naked eye iirc. lots of older growers here have war stories about dealing with em, they're the last pest you want in your room for sure.

Kgunge · Dec 21, 2021

Hey everyone , here’s an update.
@Aqua Man @tobh @MeechDGAF @GreenMtnGuru
Currently in week 2 flower day 14, any recommendations on what to do from here ? Thanks for everyone’s Input

MeechDGAF · Dec 21, 2021

Ive never personally had them just read stuff. It seems that sulfur, oils (to suffocate), and certain pesticides like azadirachtin and pyrethrin. I believe insecticidal soaps are made to be applied but not sure the ingredients or proper ratios at the moment.

Pike · Dec 21, 2021

Fuckin russets are rampant, holy shit.

kill the whole shooting match, I mean plants, Bomb the whole show. Anything else your wasting time and money

there already everywhere, look closer to the other plants, and look at the bottom of the buds, as the hairs die and they eat your trics. Your tops will outgrow um for a bit but once the stretch is over and there budding, they just destroy the plant from the bottoms up.

ravinous mofos, you can spray shit to knock um back, there just to small and are in spots that don’t get hit.

you can go primal on um and use avid, or any other nasty pesticide and that will kill um dead, but you really don’t wanna do it in flower really. And imo at this point the damage is done.

good luck, sorry to see it happen to anyone.

Pike · Dec 21, 2021

One more little surprise with russets, they continue to eat on your buds even when dried. Eat all the resin right off. And they can continue to survive eating dry material, as in trim and such.

Kgunge · Dec 21, 2021

Pike said:
Fuckin russets are rampant, holy shit.

kill the whole shooting match, I mean plants, Bomb the whole show. Anything else your wasting time and money

there already everywhere, look closer to the other plants, and look at the bottom of the buds, as the hairs die and they eat your trics. Your tops will outgrow um for a bit but once the stretch is over and there budding, they just destroy the plant from the bottoms up.

ravinous mofos, you can spray shit to knock um back, there just to small and are in spots that don’t get hit.

you can go primal on um and use avid, or any other nasty pesticide and that will kill um dead, but you really don’t wanna do it in flower really. And imo at this point the damage is done.

good luck, sorry to see it happen to anyone.

Thank you so much for taking the time to write that up. Unknowingly, you’ve just connected some puzzle pieces for us that has been going on for 6 months now, especially with the drying. I’m going to have to do some more research because yes in week 3 in flower to me it seems like fighting a losing battle…. Especially since we don’t have the kind of walking space to spray consistently without getting caught up in trellis netting and breaking down branches

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Why is my calyx browning?

Why is my calyx browning?

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