Bud rot! Need advice on next steps

ltecato

Well-Known Member
I've been keeping an eye on relative humidity in the weather report for my part of LA County. As a general rule, the readings online have been on the dryish side, 35-40% most days. Then I had a minor accident that I'm not going to describe because the details are too complicated and it's none of your business anyway, but it put me in the hospital for a couple of nights. I got someone to water my plants while I was gone, but I didn't even think about that effing botrytis attacking because of the dry weather. Well, imagine my chagrin when I went out to check my plants this morning and found two of them with bud rot. I just now checked the weather page and it says RH is at 50%.

Anyway, I cut off the infected buds and gave all the plants a quick spray of neem oil. Maybe I shouldn't have sprayed without checking first but I got all in a lather over my shitty luck, because it seems like I can't turn my back on the fuckers for five minutes without something like this happening.

So, I was going to go out and buy some mancozeb but no store near me seems to have it in stock and besides I think it's more of a preventive spray than a treatment for plants that are already sick and especially those that are as far along in flowering as mine are.

So I decided no mancozeb for now, maybe none ever since I prefer to avoid those chemicals, and I got rid of the infected branches and sprayed my scissors with Windex vinegar cleaner and left them to bake in direct sunlight for a few hours so hopefully the UV will kill any spores that the Windex missed.

Now, I've got to decide what to do with my two most mature plants. Both are Purple Godfather Kush. They are both really far along in flowering. In fact, I cut a few buds from both of them just to get an idea of how potent they might be, and both samples kicked my butt, despite not being 100% mature if you go by trichome colors and calyx swelling.

I am really really leaning toward butchering both plants and drying them out now, rather than risking more bud rot. So two questions:

How long should I wait for the neem oil to break down so I can harvest the plants? And, once I harvest the plants, what precautions should I take while drying the flowers, since they might have botrytis spores lurking inside them? Would it be a good idea to nuke them in a microwave at some point? I realize microwaving is a sub-optimal method for drying but I'm willing to sacrifice some bud quality to make sure I kill all the nasty fungus.

Also, I think I recall that Jorge Cervantes recommended dunking flowers in hydrogen peroxide-water mix if they came from a mold-infected plant. Any reason I shouldn't do that?
 

redeyedfrog

Well-Known Member
I would isolate that plant first off' straight away. You need to cut out the buds directly above and below the infected bud site' keep it real dry (I actually put a fan on it) I'd recommend putting isopropyl on a cotton bud and clean the infected area of the stem (be careful with the iso it melts trichs) itll turn black where the living spores were instantly, and just keep a open eye' if you see a sugar leaf that looks like wilted lettuce you either have a little chewing critter in there or botrytis, just pay close attention and if you can keep them dry as possible. So no I wouldn't chop at this point but if it keeps going that's another story.
 

ltecato

Well-Known Member
I know, bad idea. I'll see what the buds look like tomorrow and decide if I want to cut them now or give them time to recover. I didn't spray very heavy so maybe I'll be lucky this time. At least I have clones of the plants so I can grow more of it. Live and learn.
 

too larry

Well-Known Member
I've been fighting rot for a while now. H2O2 is your best tool. Spray down the rotten bud before clipping it. Remove all rotten buds from the area. Also clip a bud or two above and below the rotten spot.

Neem is going to mess with your smell and taste. But I've done it too. I was having rain everyday, so mine didn't taste as bad as it could have. If you are not afraid to, washing your plants will help removing the neem smell. But. . . . . . .

I do a H2O2 wash for mine with rot issues. Just make sure you shake out as much water as possible. Also keep a fan nearby for the first few hours they are hanging.

Good luck.
 

Rivendell

Well-Known Member
Peroxide is my go to as well, works against pm really well and helps with rot. With rot you still need to cut it out, but I spray the rot section first with straight peroxide, let it foam for a few and then cut it out. My theory is that killing as many spores as I can before I stir them up has to be a good thing. For pm and a after spray of the surrounding area after cutting out some rot, I dilute it with water, around a 1/2 cup to a 1/2 gallon of water.
 

TacoMac

Well-Known Member
I had a white widow this year getting bad powdery mildew before it even flowerred!
I grow white widow exclusively. I've gone to the habit of hitting them with fungicide twice during veg just on general principle and haven't had a problem since. I grow in my basement and even though I keep the humidity around 45% to 50%, I had powder mold once during mid veg (about week 3).

I don't take any chances anymore. I hit them week 3, then again right when I flip them to flower at week 5 and I've never had a problem since.

Better safe than sorry.
 

OzCocoLoco

Well-Known Member
I grow white widow exclusively. I've gone to the habit of hitting them with fungicide twice during veg just on general principle and haven't had a problem since. I grow in my basement and even though I keep the humidity around 45% to 50%, I had powder mold once during mid veg (about week 3).

I don't take any chances anymore. I hit them week 3, then again right when I flip them to flower at week 5 and I've never had a problem since.

Better safe than sorry.
What fungicide are you spraying at week 5 ?
 

ltecato

Well-Known Member
Thanks to all who have posted advice and feedback. For what it's worth, I've been checking the weather sites for the past couple nights and it appears that the humidity has been spiking way up overnight here the past couple of days. In fact, right now it's about 8 a.m. and the RH is 82%, temperature 66F/19C.

I found one bud on top of a Paris OG plant that appeared to be infected, so I poured 3% hydrogen peroxide on it and will go out in a couple minutes to cut it off the plant.

So far, all the buds that have been attacked have been the ones at the very top, on the terminal ends, where I would expect to find still-growing meristem tissue. Seems counter-intuitive that the "newest" tissue is most vulnerable, but that appears to be the case here with my plants.
 

Budley Doright

Well-Known Member
Thanks to all who have posted advice and feedback. For what it's worth, I've been checking the weather sites for the past couple nights and it appears that the humidity has been spiking way up overnight here the past couple of days. In fact, right now it's about 8 a.m. and the RH is 82%, temperature 66F/19C.

I found one bud on top of a Paris OG plant that appeared to be infected, so I poured 3% hydrogen peroxide on it and will go out in a couple minutes to cut it off the plant.

So far, all the buds that have been attacked have been the ones at the very top, on the terminal ends, where I would expect to find still-growing meristem tissue. Seems counter-intuitive that the "newest" tissue is most vulnerable, but that appears to be the case here with my plants.
The RH will rise as temp goes down but it’s still the same amount of moisture in the air. My issue is then the plant is above the dew point so it condenses. I try to give each plant a shake in the morning but it’s tough to do on a daily basis.
 

ltecato

Well-Known Member
The RH will rise as temp goes down but it’s still the same amount of moisture in the air. My issue is then the plant is above the dew point so it condenses. I try to give each plant a shake in the morning but it’s tough to do on a daily basis.
To paraphrase Ice T, farmin' ain't easy but somebody gotta do it. Now I gotta do my homework and learn about relative humidity and dew points and all that grown-up stuff, dammit.
 
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