Help! Powdery Mildew?

[Doug58]

I sprayed my plants with a pump sprayer today with 1 gallon of well water with a tablespoon of potassium bicarbonate.

Mix 4 teaspoons (about 1 rounded tablespoon) of potassium bicarbonate into one gallon of water. Spray lightly on foliage of plants afflicted with black spot, powdery mildew, brown patch and other fungal diseases.

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.

1 pound for $8.99 at Amazon.

You can try H2O2 mixed with water in a pump sprayer but I would go with potassium bicarbonate. Growtogrow mentions it in his outdoor grow thread.

 

[cubfaninmo]

I sprayed my plants with a pump sprayer today with 1 gallon of well water with a tablespoon of potassium bicarbonate.

Mix 4 teaspoons (about 1 rounded tablespoon) of potassium bicarbonate into one gallon of water. Spray lightly on foliage of plants afflicted with black spot, powdery mildew, brown patch and other fungal diseases.

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.

1 pound for $8.99 at Amazon.

Nice. Is it ok to use close to harvest?

 

[Doug58]

Nice. Is it ok to use close to harvest?

You can use pure potassium bicarbonate the day before harvest from what I have read.

Controlling or Eliminating Powdery Mildew - Growing A Greener World®

Judging from the number of questions I get every summer about the plant fungus known as powdery mildew, I’ve learned three things over the years; it’s everywhere, you don’t like […]

www.growingagreenerworld.com

 

[Doug58]

Organic Ways to Kill and Prevent White Powdery Mildew

Powdery mildew, while not usually a fatal plant disease, will severely affect a garden plant's vitality. There are organic ways to kill powdery mildew that are safe and effective.

dengarden.com

If you are located near a Family Dollar store you can get H2O2 for a dollar a quart last time I was in one. If you can't wait to get potassium bicarbonate you could try baking soda also as it is really inexpensive. Recipe in the links I posted. I'd get some potassium bicarbonate though.

 

[Doug58]

Growtogrow's thread where he mentioned potassium bicarbonate.

https://www.autoflower.org/threads/...somango-dragon-blood-hp-fire-og.76263/page-35

 

[Doug58]

I did my first grow last year and put away a couple pounds of around ten strains.

This year I had five photo plants growing. I cut three down as I was running out of room outside. Still have two female photos growing. Trying to keep them under six feet tall but they may have to go, also.

I have one White Widow from Fastbuds I pollinated with Afterthought Autos Northern Lights auto strain, called Solar Wind.
Three Afterthought Autos Blueberry autos pollinated with Northern Lights.
Several Afterthought Autos Northern Lights strain crossed with male Northern Lights strain.
I also have one Afterthought Autos Azure Rocket strain crossed with the Solar Wind strain.

I'm just growing for seeds this year.

Blueberry auto about five feet tall. Just started budding.

Another Blueberry that even though buried in ground is about to top the six foot fence. I didn't do enough early topping. These are autos.

 

[cubfaninmo]

I did my first grow last year and put away a couple pounds of around ten strains.

This year I had five photo plants growing. I cut three down as I was running out of room outside. Still have two female photos growing. Trying to keep them under six feet tall but they may have to go, also.

View attachment 1217633


I have one White Widow from Fastbuds I pollinated with Afterthought Autos Northern Lights auto strain, called Solar Wind.
Three Afterthought Autos Blueberry autos pollinated with Northern Lights.
Several Afterthought Autos Northern Lights strain crossed with male Northern Lights strain.
I also have one Afterthought Autos Azure Rocket strain crossed with the Solar Wind strain.

I'm just growing for seeds this year.
View attachment 1217635

Blueberry auto about five feet tall. Just started budding.
View attachment 1217636

Nice!

 

[cubfaninmo]

I sprayed my plants with a pump sprayer today with 1 gallon of well water with a tablespoon of potassium bicarbonate.

Mix 4 teaspoons (about 1 rounded tablespoon) of potassium bicarbonate into one gallon of water. Spray lightly on foliage of plants afflicted with black spot, powdery mildew, brown patch and other fungal diseases.

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.

1 pound for $8.99 at Amazon.

You can try H2O2 mixed with water in a pump sprayer but I would go with potassium bicarbonate. Growtogrow mentions it in his outdoor grow thread.

Ordered. Arrives Tuesday! I really appreciate your help. Kinda freaking out being so close and trying to get my first plant to the finish line.

 

[Doug58]

Ordered. Arrives Tuesday! I really appreciate your help. Kinda freaking out being so close and trying to get my first plant to the finish line.

I tried posting a link to the Amazon product I bought but the link wouldn't show up.

 

[cubfaninmo]

I tried posting a link to the Amazon product I bought but the link wouldn't show up.

Hit them with potassium bicarbonate last night but may have went a bit light. Was afraid of getting the buds too much. That coupled with rain makes me think it didn’t work fully. Do you know how often plants can be treated?