Help: White Stuff On Leaves (with pics)

[PazVerdeRadical]

hello fellow growers,

i found these white spots on the leaves of my plants. i don't know what it is or what is causing it.
these plants are outdoors, in pots, 100% organic ferts and a mixture of local soils with composted soils.
the plants are about 5 months old. all from seed, seeds gathered from colombian pressed bud grown in
colombia. i´m at 8.6 latitude. the plants are not very tall, they seem to be some kind of short sativa hybrid. they're about 4 feet tall.
but this could be due to being grown in smallish pots. they´re getting 5 hours and half of direct sun light and the clarity of the whole day which is a total of 12 hours.

here's a couple of pictures:





i have tried curing them by cleaning the affected leaves with a mixture of kitchen vinegar and water. about 1 part vinegar and 4 parts water. although i can clean some of the stuff, more keeps appearing, usually in the mid and lower sections of the plant.
it is not a lot, just on few and random leaves.

thank you all in advance for any help/information you can provide me with.

peace and light.

 

[irie-i]

hard to tell from your photos, maybe damage from insects. do any other plants around have it the same symptoms?

 

[Babbabud]

Looks like powdery mildew from what i can see. Remove all affected leaves and then spray with a product such as serenade. Best way to go is a sulphur burner but a vigilante use of serenade can knock it back to next to nothing in no time. Serenade can be gotten at most garden type stores .

 

[PazVerdeRadical]

hard to tell from your photos, maybe damage from insects. do any other plants around have it the same symptoms?

i´ve seen some bugs on the plants, kinda big, vertical looking, black or green or gray, and when you squish them they´re red inside.
yes, other plants around it show the same symptoms.

what causes mildew?

thanks.

peace.

 

[Babbabud]

The powdery mildew is a spore that is present in the environment all the time.The humidity, the temperature and the surface of the leaf all have to do with creating an environment that can allow that spore to grow. A sulphur burner puts a film on things that dont allow the spore to grow. Serenade is an organic product and will really help slow down the PM. They say you can use Serenade right up to the last few days of flower although ive never needed it so late. It does have a fairly strong smell to it so im not sure how late into flower i would be willing to use it but i would say at least up till the last two weeks would seem to be ok. Hope this helps as i am just a laymen and cant really get into the science of why this all happens but think i did get the general idea across to you. Once the mold is pretty much gone another good thing to keep it away is to spritz with a water that has a ph of 8 as it will leave a slight film and the mold cannot grow on a surface with a ph of 8.

 

[Blackmelo]

That is a bug infestation. Little bugs are eating away at your leaves.

Most likely bugs are spider mites and fungus gnats. Spider mites are smaller than a mm so very very small but they can be spotted by the bare eye. Look for any little things crawling around in the soil.
Fungus gnats will lay their eggs on leaves and their larvae will cause that damage. Fungus gnat larvae are ever so slightly bigger than spider mites and look like yellow cater pillars.

 

[PazVerdeRadical]

thank you BabbaBud

Blackmelo, thank you, how do i get rid of them? organically if possible?

peace.

 

[BagseedSamurai]

Looks like either youve got deposit of some sort, or bugs have been spinning webs on your stuff. Is it kind of stringy?

I had the same type of thing, turns out a spider was trying to make an egg-nest in my plant. And succeeded. Ever seen what they call house spiders in the south? Big friggin neon colored monstrosities? Yeah. Thats what I had.

Anyway, these blokes'll help ya. Thats just my .02.

 

[PazVerdeRadical]

hello BagseedSamurai,

it is not stringy, it is like a white stain comparable to the stains you can get on your clothes after having been against certain types of white painted walls. you know?

i checked under the leaves and found some kind of oganism in a few, also some of the leaves where the bugs were on had very little black deposits of what seemed to be some kind of sticky material.

meanwhile, i read the sick plants guide that's on the sticky of these forums, and regarding fungus ngat, i peeled some potatos and placed them in the pot's soil, hoping to lure them towards the potato peels. later today i will be going to a store and see what kind of products can they offer me to solve this issue.

thanks again everyone, you have been very helpful.

peace.

 

[PazVerdeRadical]

Well, back from the main three agricultural stores of the area, all i could find was
Trichoderma Harzianum, a biological fungicide. recommended for a variety soil fungus. i bought a bottle, comes in poweder form, costed me the equivalent of 5 dollars.

anyone heard of this? would it be useful? i didn't find anything else that didn't have a big warning that went: SLIGHTY TOXIC DON'T STORE AT HOME.
what a fucking joke.

remember i'm in the 3rd world, not a lot of product availability.

thanks.

Peace.

 

[BagseedSamurai]

If it says TOXIC, i wouldnt spray it on your plants. Cannabis is NOTORIOUS for absorbing everything around it. There werre some actually planted at chernobyl to soak up some of the radiation.

..especially if you plan on smoking the yield.

 

[PazVerdeRadical]

worry not BagseedSamurai, i won't spray any of those wicked products.

cool info on chernobyl btw, where did u find out of that?

for now what i have done is place potato peels hoping to lure the bugs towards them.
i cleaned the outside of the pots and the inner upper rim of the pots with Creoline, and i have been spraying peroxide 3% mixed with water.
been reading articles on the net about its use on farming, seems to be a pretty nice thing to have around no doubt. the extra molecule of oxygen just seems to burn bugs off... kills spider mites on contact and it is just oxygenated water, can't beat that.

hope it helps.

thanks again.

peace!

 

[Blackmelo]

Paz, I've never had to get myself anything against pests yet, knock on wood so I can't recommend anything I have tried but Nirvana sell some pythyium I think...
http://www.nirvana-shop.com/solutions-pest-mold-controllers-c-25_32.html

Here is a link about weed able to clean soil of toxic material.
http://www.norml.org.nz/Hemp/Hemp_cleans_chernobyl_waste.htm

 

[PazVerdeRadical]

ty Blackmelo, interesting products and even more interesting read!

it makes wonder, how the russian goverment gave an ultimatum to make a non psycho-active cannabis plant. this means industrial hemp is no different from our new marijuana breeds, they are both manipulated by man. although i can´t help but ask how good would a very psychodelic cannabis plant would act as a soil cleaner against industrial hemp. that would be awesome to know.

 

[Neptune]

brother, you have multiple problems and i suggest a "Hot-Shot NO-PEST! strip"

found at walmart, home depot.. they are toxic, but they kill everything... use for 1 week and discard, you wont have problems again.

 

[PazVerdeRadical]

hello neptune, wow i never saw your post here... thanks for the advice, although there is no home depot where i live... the plants in the pics above were already harvested with no problems, thanks to Jah although yes, all of it was caused by a few insects, but in small populations that didn´t do much harm afterall. i bet the strip would have helped. thanks. peace.