After my grow room flooded i found PM on my plants. i did a heavy application of 100% neem oil 30 minutes before lights on. Now, two weeks later i still am spot treating PM on some fan leaves and today i found a tiny bit on a sugar leaf. Its day 38 and I'm wondering what some others might think about my presenting problem. I think this is controllable as long as my grow environment continues to stay stable and i spot treat any visible PM. What say you? Cheers OGB
Powdery Mildew Late in Flowering
- Thread starter OGB
- Start date
Serenade works for me.
Or, greencure never used it, but ppl here love it.
May be able to get in a sulfur burn, but that is a close call that late.
Exhaust, circulation, removal of infected tissue and spot treat is my call.
Just be careful when removing leaves that you don't spread it more, so maybe spot treat before removing infected tissue?
Hate the PM.
Or, greencure never used it, but ppl here love it.
May be able to get in a sulfur burn, but that is a close call that late.
Exhaust, circulation, removal of infected tissue and spot treat is my call.
Just be careful when removing leaves that you don't spread it more, so maybe spot treat before removing infected tissue?
Hate the PM.
2
2cents
sometimes at day 38 on a 55 day strain I personally start removing some of the fan leaves and even sugar leaves if they are covered with a few spots of pm, its best to remove the whole leave instead of just the blade the spot is on, I keep the whole stem attached to the plant, even if it also has a spot or 2 on it.. sometimes i will use my saliva and rub that on the stem or spot and that seems to help.. many people have many different strategys, but at this point my personal preference is to avoid any type of chemical or spray type shit at this stage.
by this point on some strains if the nugs are already nice and big.. removing these pm covered leaves may not hurt the yeild too much due to the fact that more light is able to penetrate previously shaded spots
if the pm is runaway style if you don't do something shit will be covered on the nugs themselves..
another thing is to use a dehumidifier to bring your rh down, but then you could face other problems...
and shit 100% neem? wow
by this point on some strains if the nugs are already nice and big.. removing these pm covered leaves may not hurt the yeild too much due to the fact that more light is able to penetrate previously shaded spots
if the pm is runaway style if you don't do something shit will be covered on the nugs themselves..
another thing is to use a dehumidifier to bring your rh down, but then you could face other problems...
and shit 100% neem? wow
Sounds like you might be close to 30 days to harvest. You can use whatever you want. It won't hurt the flowers, the plant or the taste.
You can use some of the products mentioned above, or you can use a real fungicide 30 days out from harvest.
Your choice. No problems
You can use some of the products mentioned above, or you can use a real fungicide 30 days out from harvest.
Your choice. No problems
-Thank you Rednick for the idea with the Serenade, i researched it and like that its 100% organic.
-2cents, I have caught the PM early enough that i feel comfortable with just spot treating instead of removing the leaf, possibly risk spreading spores. If leaves are yellowing later in flowering i think pruning can help the plant. Also i dilute the neem oil with water and a little liquid soap to act as an emulsifier.
-grapeman, exactly 30. Thank you. After today's spot treatment i think i will have it taken care of.
-2cents, I have caught the PM early enough that i feel comfortable with just spot treating instead of removing the leaf, possibly risk spreading spores. If leaves are yellowing later in flowering i think pruning can help the plant. Also i dilute the neem oil with water and a little liquid soap to act as an emulsifier.
-grapeman, exactly 30. Thank you. After today's spot treatment i think i will have it taken care of.
Green Cure is pretty good as well, also " omri organic."
If you can find it, straight " Sulphur Dust " or " Sulphur Powder " is extremely cheap and works very well to mix with Green Cure even late in flower. It makes a milky type mix that will leave a little residue on your leaves and it works awesome. I know at least 5-6 people who have eliminated pm with this combo, and the sulphur powder says you can spray it on strawberrys and eat the same day. ( I wouldn't do that , but you could def use it 10 days before harvest with a water spray down at the end. )
Besides temp and humidity, there is one big factor a lot of people don't consider when fighting pm..... ROOM CLEANLINESS. Most people are amazed what a difference cleaning your floor and walls with every watering/ nute change will make. Also if your in soil make sure you don't over water and pick up some hygrozyme if you want to go even further....
If you can find it, straight " Sulphur Dust " or " Sulphur Powder " is extremely cheap and works very well to mix with Green Cure even late in flower. It makes a milky type mix that will leave a little residue on your leaves and it works awesome. I know at least 5-6 people who have eliminated pm with this combo, and the sulphur powder says you can spray it on strawberrys and eat the same day. ( I wouldn't do that , but you could def use it 10 days before harvest with a water spray down at the end. )
Besides temp and humidity, there is one big factor a lot of people don't consider when fighting pm..... ROOM CLEANLINESS. Most people are amazed what a difference cleaning your floor and walls with every watering/ nute change will make. Also if your in soil make sure you don't over water and pick up some hygrozyme if you want to go even further....
Wow, thats great 303hydro. What ratio of sulpher powder to Green Cure? I am sure this would help a lot of people knowing that PM can be contained later in flowering, and doesnt have to be a deal breaker! I agree, keeping the grow room clean is very important and is definitely not overlooked with me! Cheers OGB
All great advice above, especially about general room environment which is the most important aspect of fighting PM. I rarely talk about products, but there are some new ones that are using Potassium Silicate that show promise as systemic fungicides. The cannabis market has some, but they're being marketed as a source of P instead of a systemic fungicide which is what they're recognized for in the 'straight' agriculture circles. Dynagrow (originally 'straight', but crossing over into the cannabis market now) makes Pro-Tekt; http://dyna-gro.com/003.htm
shop vac or use a damp sponge soaked in water thats been treated 1tsp baking soda 1/4 tsp epsom salts
elgwedoloco
Member
Can you please go into more detail because this makes no sense to me.
