LukeS Posted June 20, 2019 Author Share Posted June 20, 2019 Spray on plants every one to two weeks. Potassium bicarbonate– Similar to baking soda, this has the unique advantage of actually eliminating powdery mildew once it's there. Potassium bicarbonate is a contact fungicide which kills the powdery mildew spores quickly. In addition, it's approved for use in organic growing. Quote Link to comment Share on other sites More sharing options...
Kgrows Posted June 20, 2019 Share Posted June 20, 2019 @LukeS correct, same thing, it works by raising the ph of the leaf to a point where the fungus cannot survive. but its not a good idea for flower, i've used H2O2 many times with amazing results, its good for the plants. you need to start with a 35-50% H2O2 solution & dilute it to 3% -theres a formula for this, let me know if you want to go this route & i'll post it. just make sure you spray early morning before lights or just before they switch off Quote Link to comment Share on other sites More sharing options...
LukeS Posted June 20, 2019 Author Share Posted June 20, 2019 (edited) @kgrows I am willing to do what will work, Up until about 30 minutes ago i was not aware of the severity of the issue. Thanks. Edited June 20, 2019 by LukeS spastic moment Quote Link to comment Share on other sites More sharing options...
Kgrows Posted June 20, 2019 Share Posted June 20, 2019 h2o2 actually oxidises the proteins in the fungus effectively burning it off, when it oxidises its releases oxygen the rest of whats left degrades into O2 & H2O Quote Link to comment Share on other sites More sharing options...
Kgrows Posted June 20, 2019 Share Posted June 20, 2019 (edited) @LukeS the reason i dont like bicarb at a late flower stage is that it can get absorbed into the trichomes which will leave you with a harsh smoke & taste. foliar spraying with lemon juice will attract WPM so its not a good idea, ideally you should be at about 6.2ph for foliar feeding. the only real downside to H2O2 will be that you may loose some terpenes - this is debatable, but you will finish with good smokeable bud - i would still advise a bud wash after harvest. apply every 2-3 days. spray early morning before lights or just before they switch off & have a fan running. if you do this mid light cycle your plants will burn. you can use the formula for diluting anything thats a bit tricky: Using C1V1 = C2V2 To make a fixed amount of a dilute solution from a stock solution, you can use the formula: C1V1 = C2V2 where: V1 = Volume of stock solution needed to make the new solution C1 = Concentration of stock solution V2 = Final volume of new solution C2 = Final concentration of new solution So lets say you want 3%(C2) final concentration & 1000ml (V2)of the final solution You have 35% H2O2 (C1) So: 35 x V1 = 3 x 1000 35 x V1 = 3000 V1 = 3000/35 V1 = 85.7ml IMPORTANT STEP: V2-V1 = water volume 1000 - 85.7 = 914.3mlSo to get 1L of 3% H202 solution you need to add 85.7ml of 35% H2O2 to 914.3ml water Edited June 20, 2019 by Kgrows 1 1 Quote Link to comment Share on other sites More sharing options...
LukeS Posted June 20, 2019 Author Share Posted June 20, 2019 Okay cool, will get tonight and spray tomorrow morning. Thanks for the info. 1 Quote Link to comment Share on other sites More sharing options...
Kgrows Posted June 20, 2019 Share Posted June 20, 2019 @LukeS just make sure its food grade, stuff from the pharmacy is generally not "consumable". check out greenthumb.co.za or hydroponics.co.za Quote Link to comment Share on other sites More sharing options...
LukeS Posted June 20, 2019 Author Share Posted June 20, 2019 Shot, about 20 minutes too late. Just got back from the pharmacy, anyway, will go past GThydro tomorrow thanks. Quote Link to comment Share on other sites More sharing options...
Kgrows Posted June 20, 2019 Share Posted June 20, 2019 sorry bro, use it to sterilise your tools etc, did the same thing Quote Link to comment Share on other sites More sharing options...
LukeS Posted June 20, 2019 Author Share Posted June 20, 2019 (edited) lol, thanks anyway. Appreciate it. Edit: My wife brings up a good point, atleast you told me before i sprayed it on the plant. Thanks for that. Edited June 20, 2019 by LukeS edit 1 Quote Link to comment Share on other sites More sharing options...
Kgrows Posted June 20, 2019 Share Posted June 20, 2019 no worries, when you spray it on you will see some fizzing, means its working Quote Link to comment Share on other sites More sharing options...
Master_G Posted June 21, 2019 Share Posted June 21, 2019 16 hours ago, Kgrows said: @LukeS the reason i dont like bicarb at a late flower stage is that it can get absorbed into the trichomes which will leave you with a harsh smoke & taste. foliar spraying with lemon juice will attract WPM so its not a good idea, ideally you should be at about 6.2ph for foliar feeding. the only real downside to H2O2 will be that you may loose some terpenes - this is debatable, but you will finish with good smokeable bud - i would still advise a bud wash after harvest. apply every 2-3 days. spray early morning before lights or just before they switch off & have a fan running. if you do this mid light cycle your plants will burn. you can use the formula for diluting anything thats a bit tricky: Using C1V1 = C2V2 To make a fixed amount of a dilute solution from a stock solution, you can use the formula: C1V1 = C2V2 where: V1 = Volume of stock solution needed to make the new solution C1 = Concentration of stock solution V2 = Final volume of new solution C2 = Final concentration of new solution So lets say you want 3%(C2) final concentration & 1000ml (V2)of the final solution You have 35% H2O2 (C1) So: 35 x V1 = 3 x 1000 35 x V1 = 3000 V1 = 3000/35 V1 = 85.7ml IMPORTANT STEP: V2-V1 = water volume 1000 - 85.7 = 914.3mlSo to get 1L of 3% H202 solution you need to add 85.7ml of 35% H2O2 to 914.3ml water This needs to be a sticky. This is Vital information and look you dont even need to know what V's from the C's. Thanks so much. Now I just have to make some PM happen... Wrong time of the year in Joies for mildew 1 Quote Link to comment Share on other sites More sharing options...
AcidAlice Posted June 21, 2019 Share Posted June 21, 2019 16 hours ago, Kgrows said: @LukeS the reason i dont like bicarb at a late flower stage is that it can get absorbed into the trichomes which will leave you with a harsh smoke & taste. foliar spraying with lemon juice will attract WPM so its not a good idea, ideally you should be at about 6.2ph for foliar feeding. the only real downside to H2O2 will be that you may loose some terpenes - this is debatable, but you will finish with good smokeable bud - i would still advise a bud wash after harvest. apply every 2-3 days. spray early morning before lights or just before they switch off & have a fan running. if you do this mid light cycle your plants will burn. you can use the formula for diluting anything thats a bit tricky: Using C1V1 = C2V2 To make a fixed amount of a dilute solution from a stock solution, you can use the formula: C1V1 = C2V2 where: V1 = Volume of stock solution needed to make the new solution C1 = Concentration of stock solution V2 = Final volume of new solution C2 = Final concentration of new solution So lets say you want 3%(C2) final concentration & 1000ml (V2)of the final solution You have 35% H2O2 (C1) So: 35 x V1 = 3 x 1000 35 x V1 = 3000 V1 = 3000/35 V1 = 85.7ml IMPORTANT STEP: V2-V1 = water volume 1000 - 85.7 = 914.3mlSo to get 1L of 3% H202 solution you need to add 85.7ml of 35% H2O2 to 914.3ml water I didn't know if I was looking at math, biology, or I'm just stoned. Quote Link to comment Share on other sites More sharing options...
KushNewbie Posted July 27, 2019 Share Posted July 27, 2019 @LukeS Just read the entire thread. You mentioned being a bit disappointing from your grow but from where you were to how your plant bounced back is truly remarkable so well done. What was the actual reason for the plant not doing well once you moved it into the grow tent at the beginning? Quote Link to comment Share on other sites More sharing options...
LukeS Posted July 28, 2019 Author Share Posted July 28, 2019 On 7/27/2019 at 2:25 PM, KushNewbie said: @LukeS Just read the entire thread. You mentioned being a bit disappointing from your grow but from where you were to how your plant bounced back is truly remarkable so well done. What was the actual reason for the plant not doing well once you moved it into the grow tent at the beginning? Thank you very much, In the end, I harvested around 100g from the plant, smoke is unbelievably smooth and tasty, but the potency is a bit weak. Nonetheless it is a great smoke. I think, there were multiple reasons, the main being the plant was a bit root locked, and when i put it in the tent with increased light exposure, air circulation, increased temp it experienced a growth spurt and got unhappy with the lack of space. It was only upwards in growth and happiness after the pot transplant. 1 Quote Link to comment Share on other sites More sharing options...
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