I have two plants that appear to have contracted early blight. One is much worse off than the other. I’m looking for some advice on how to move forward.
They are both around 3-4 weeks flower. The one smaller plant has had one lower side completely ravaged I plan on removing all severely affected limbs and any leaves form that side of the plant to try and protect the rest. Then plan on following up with some kind of fungicide treatment possibly potassium bicarbonate, I’d like to try bacillus subtilis as I’d like to stay as organic as possible but I’m having trouble sourcing some where I am.
As for the second and larger plant the damage/infection isn’t nearly as severe it is like to get on top of it as quickly as possible. I’m going to clean up the inside of the bush, spread some branches to promote airflow, remove affected leaves and treat with the same treatment as the other.
A few questions and comments I have for the forum are:
Is this alternaria? I’ve never seen anything like it on cannabis and until now wasn’t even aware it could be affected.
What are my foliage treatment options? I’m in flower so I’d like to stay away from sulphur or copper based fungicides, I’ve heard potassium bicarbonate works on blight for tomatoes but have also read about its potential to burn pistils. I’ve also heard of milk water mixtures working for wpm but not sure it would for this fungal infection.
What are the chances this spreads to the buds and how potentially harmful is it if it does? I always bud wash my outdoor do deal with dust bugs and any mildew spores but everything I’ve read about alternaria basically says to scrap and burn the plant. Would the bud wash kill any harmful spores prior to smoking?
Thanks in advance for any advice I’m pretty gutted about this whole situation, my big plant was probably the best I’ve grown so far until now.