Help sick Homer!

[rr14]

Hi guys. I have 3 homer kush strains. I bought them as a rooted clone and installed them into my dwc/aeroponic setup.

One one or two leafs on each plant, there is a powdery white substance. It's pretty light and only covers a small amount of the leaf. I would compare the size to 1/4 or 1/2 the size of a dime.

One two of the plants, the leaves are withered and dry looking. The texture isn't as soft as the other leaves.

In addition, the leaves on this plant are more downward curling then the other plants in my hydro setup.

Growth is a little slower as well. There are some awesome roots on these guys however. Some of the roots are 5-6" long and have a pretty nice white color.

Environmnt is temps 76-81 during lights on, 45% humidity. Temps as low as 66 during lights off. Res temp is about 72-74*. Aeroponic sprayers every 80 minutes.

The other plants are taking off and these haven't put on much size or vegitative growth yet. I sprayed them with a little bug killer just in case the other day and it didn't do squat so I'm guessing is mold or fungus. Any input or suggestions? thanks!

 

[lynz420]

I don't know anything about aeroponics or dwc growing so I can't help with the growth problems, but can confirm from seeing the white leaf spots in the 3rd picture that your plants have powdery mildew.
There are lots of remedys for it, search around the site and decide which is best for your circumstances. It shouldn't be hard to get rid of it now while the plants are small and don't have many leafs. Whatever you do, don't wait for the plants to get bigger and let it spread.

It would also be a good idea to wipe down your whole grow area with bleach or some other disinfectant to kill off any spores and prevent them from infecting the plants again. It is difficult to get rid of them all though, fungus spores are everywhere. The best you can do to prevent pm after you have cleaned the plants up is control the enviroment. Keep the humidity down, have good air intake/ ventilation/circulation and make sure your plants are strong and healthy enough to fight it off.

Good luck

 

[bassmechanic27]

Yeah, lynz420 is right. It looks like powder mold. I have had that. I mixed a anti-bacterial soap and warm water and gently wiped the plant clean, it worked great. I haven't seen it since. Use the search button on here and search for powder mold. Hope this helps. Good luck and happy grows!!

 

[rr14]

I did the soap thing in the morning and after work I sprayed it with immunox from the local lowes. I got off work to late to make it to the hydro shop. Supposedly this stuff works for bugs and powder mold although it's true intent is for roses.

 

[scegy]

hey man
welcome to the hydro world!

first remove the powdery mildew
then tell us ur pH and EC at first

my lucky guess would be that those plants aren't ready to take up much nutrients yet, try moving the light a little higher because it hurts sick plants

another thing that "bothers" me is that you turn on ur sprayers every 80mins, i think that that peroiod is too long, the roots can get dry in between, try searching the threads for TAG(true aeroponic growing), you'll get the needed info for aero there, because i run DWC and don't have much info on that, but do check those 80 mins

ventilation is very important for the powdery mildew to be gone, so have a fan blowing on the tops working 24/7 or at least to turn on every hour for a few mins to mix the air

 

[rr14]

here's some more details. I'm currently running the pumps every 50-60 minutes or so. The oscillating fan is on 24/7 and does hit the plants sightly.

Last time I did tag style growing I turned them on more frequently. I'm gradually getting it down to 30 minutes. At first I was worried about saturating the grow media, but it doesn't seem like it's as much of an issue now that the root structure is developing better.

Right now I'm running t8 floros at 6500k. They are about 5-6" above the top of the sick plants. My ppm is about 900 using r/o water. I'm not sure about the ph.

 

[scegy]

well if you'r not sure about the pH then there's not much to discuss, but your ppms are a little high, i would also bring the lights closer to the plants since fluoros don't produce much heat and are pretty unefficient if they are too far from the plants

you MUST test your ph somehow, buy a simple pH tester with color scale in aquarium shops or something, ph is fairly important here, specialy in the young stages of the plant, won't even grow if ph is wrong

as far as TAG goes, as long as the roots stay wet throughout the OFF cycle you should be fine.... i also don't like to have my grow media saturated, i guess that's why they mostly use mediumless(just foam holding the stems) in aero, at least the systems i've seen so far.....wet media causes root and stem rot in my book

btw, what are your water temps (in the bucket), and state ur air temps too?

get some more pics of the roots if u can and the whole thing

 

[rr14]

hey guys. Here are some updates. Over the last few days I've been dropping the repeat timer down. I didn't want to flood the plants with nutrients and soad the grow plugs. So far so good. I'm down to 30-40 mintues off and 30 seconds on. The roots get nice and wet in 30 seconds.

Air temp today is 76 with most of the last week being about 80 during lights on. Night temp is 68-74. RH is in the mid 40's usually. Res temp is 73.5 today and is usually 72-75. I'm using dutch masters zone in the res. Res ppm was 867 today.

As you can tell through the pics, most of the plants are in the 6 to 11" range except for my 3 sick homers. I spraid them the other day and got rid of the fungus on the leafs but I'm not out of trouble yet. They have some funky leaves. Keep in mind that all the other plants look awesome. Root structure on the better looking of the 3 is really taking off and the plant is visibly growing. The other two are still developing and haven't got the good root structure yet.

Is that just burn from the nutes being too high on the homers? I'm guessing that the other ones since they're move developed can take it.

 

[rr14]

The canopy....



a pure purple kush



check out that nasty leaf texture


here's more



and more





by the way, these guys are starting to suck up the nutes!!!!