One more question I'm hoping to get a reply about. I am running 2 6kwatt rooms next to each other. Keep getting pm, and the question is would the excessive iron and manganese cause that pm or old genetics that had pm even though no pm was showing, I know these cuts were prone to it. My dehumidifier stopped in middle of last flower cycle ( humidity spike).or I'm in a sealed room. Or combo of all these?
So I killed off all old genetic, gonna miss that royal dutch cheese.
Cleaned room over and over.
Burned sulfur
And started trying to be more proactive with IPM using neem, photosynthesis plus or triathalon
I have no pm now so I'm hoping for some other tips or hints.
Thanks from Maine
a podcast i listened to recently talked about plants that are given too much N are more prone to PM and insect infestations. the key to creating a tough environment for PM is having
minimal temp swings between night and day. less than 10deg. is ideal. preventing rapid cool down between day and night temps is also critical. one of the reasons why i have my exhaust on a photosensor temp controller. soon as the lights go off, so does my exhaust fan. you must have environmental control during night still though, so circulating fans on, dehumidifier on, etc. another help with PM is trying to prevent leaves from laying on top of one another where humidity is trapped, and a microclimate is created for a PM spore to land, stick, and germinate. another thing noted by some growers is, if you grow in a room with an exposed cement floor, having some of buffer (like barn stall mats) over the floor will also help room temp gradually decrease when lights go out.
you did the right thing though, sulfur burn the environment and whatever plants are still around in it. i've had PM a couple times throughout my journey with this plant. the first time i got it, it took me a year to figure out how to break the lifecycle.
something else you can do is buy a box fan, and then buy a contractor merv 12 filter. tape the filter to the back of the box fan and leave no gaps between fan and filter untaped. seal it good. then turn the fan on full power. this will filter spores out of your environment (same as a hepa air unit but waaaaaaaaaaaay cheaper and filters more air much faster)
could old genetics make a plant more vulnerable? maybe so, hard to quantify that if your environment is not in check.
