Leaves have bulges

Hi

Something unknown to me happens mostly with young leaves near the top of the plant. They have small bulges that after some time became brown and turn into necrosis causing holes in leaves. Leaves then are punctured (see uploaded pictures). I have switched to flowering 3 weeks ago and all looked ok (new growths at most of the nodes, flower hairs present).I am using special fertilizer for flowering period but in prescribed amounts. Plants are kept indoor so it could not be caused by insects/bugs but it looks hell like something is eating leaves.



Please help!!!

Yes, it does look like something is eating the leaves. Are there slime trails in the vicinity of your plants that would indicate slugs? Unexplained moisture on the leaves? Could be aphids.

It's time to bring in some pesticides, for sure, before things get worse. I'm not talking RAID or Black Flag here, but a safer non-poisonous compound like neem oil or an insecticide soap.

it looks like bugs to me,you need to spray with something non toxic because your in flower

Hey,
their are two things that come to my mind-not saying this is what they are!

First, I have noticed that leaves not only buldge when heat stress but also can cause sharp blade look. ( never mind the stains characteristics) Now if you are getting a browning around the edges, than, combining with heat stress you can develop deterioration around the leaves. this happens by over/under of phosphorus and the plant has trouble mantaining its own thermal temp. This can become an agreavated factor if you under water and under water Only once! Now I only bring this up because I have had a few plants with similaritys to your leaf structure and they were under my overlap of light... I eventualy was developing major deterication around the 5 week of flowering!!!
The second thing I noticed:
Your leaves look like they have more than a wax coat on them and maybe it's from some sort of spary.. You prob know if you spray in the lights you can burn your foilage. And belive me!! When u deal with numbers of plants you get tempted to become lazy! First you will notice your leaves with spots of pail looking spots and in days they turn into holes... This happens simly by allowing a hotspot to collect and weeken the leaf structure at the spluge of water.

For bugs, well I have no idea!!! I have never had a bug eat big holes in my leaves indoor or Out but that is I am not saything they wont. What gets me, is that if you look under the leafs, you will notice dark blotching, to me that is a sign of a point of deteriation-rather than bug damage, and perhahps those spots with the sign of dark blotching will end up as another hole.
I know mites and shit eat greenery k, and I know thirps etc all love distroying leaves, I just dont see that being the case, but perhaps somthing bigger!!

Something interesting: I have seen a garden picked apart by ants.. Than again, I have seen outdoor crops, planted in 5gallon grow bags, over large ant infested cutt blocks and the plants showed no sign of damage.. If you are growing in a basement, it might be ants or bettles. Mot indoor bettles detererat everything it can, perhaps it finds your plant rather tastly lol..

Now that I look at it again, I noticed your frist pic to be bug damage.. Not to do with any nuteriant or heat. but your second one does! Good luck.. Maybe place a sticky trap near the plant and see what comes around- I would do this before spraying.. and if you spray maybe try using a soya extrac, it will be safe since your in flower! And works great for powerder mildew and mites... (its an insecticide)
Good luck

Hi

Thanks for reply. There is no slime trails in the vicinity. My plants are kept in empty room with windows opened during light period and there is mosquito net mounted to window so no bugs should squeeze in. I am only using natural light and shortening day by light-sealing room. The wax coat that JLStiffy mentioned is probably from spray that I used hoping that it could scare of potential bugs. Spray is made from water and garlic extract. I read somewhere that it is good natural stuff against insects. It is spicy so could it be harmful for flowers??? It is certainly not the case of leaves problems since I used it aftermath. I am inclined toward JLStiffy's suggestion that it would be rather this spots with dark blotching turning into holes not bugs. I will also place sticky traps and see if something catches. I have notice another problem with lives. The bottom leaves small or big (see pictures) are shedding and in substantial amount. As you can see they are light green/yellow sometimes with brown patches. But most of leaves that shed are just light green/yellow. Is this natural during flowering period? If not could that be connected with bulges/holes? This is my first experience with growing cannabis and I only rely on others experience (books, forums, photos).

Hi,
With out all your details it is a little harder to pin point out the truth behind the set. BUt I would like to say it is a case of N deficiency. This can happen from several ways, such as, not feeding or using hard well water and feeding creating an imbalance. In most cases these imbalances would show up in trace elements, were epsom salts would help and VitaMAx would be a quick fix.. If these plants are droping leaves just with a simple shack, u most likely need to start doesing quickly with micro nuts as a safty and start from their!! I dont know if it is a lock up of ONE element caused by a imbalance OR a Nutt lock up because of mineralization on the root hairs..
If I were u, I would simply give them some VitaMax and half strenght 25ML per 5Gallon or 5ML per gallon. VitaMAx is 1-1-2. Or Epsom salts at your local drug strore. If u use Nuts than I would flush with origanl dish soap such as sunlight. I would flush light and do it oftan-two times in a row) Than I would use my feed with VitaMAx and Carbload. Feed light and feed often.
If I knew a bit more I could make a few more sugestions but the overal yellowing of your leaves- and the yellowing being balanced I would have to say thats a lack of N getting into your plants systems-and that problem is starting at its roots (either it is getting feed but not enought, to much, or an imbalnce) This would also explain for the die back on your leaves as wel..
Keep in touch and update with whats going on!

Hi

Apart from using special fertilizers for flowering ( P2O5 i K2O dissolved) I also use typical for vegetative period but in very small amounts. I read somewhere that too much N during flowering is not a good idea. I guess too little is bed as well. It must be something with nutrients holes in leaves have a brown edges. If holes were caused by bugs there should not be any colour changing. Until now I was using two type of fertilizers together mixed with water. Was it a good idea? Or maybe I should use one day fertilizer for flowering and the other day vegetative fertilizer? I now increased amount of vegetative fertilizer and see what will happen.

Thanks for help!!!

HI,
well it depends on your application of NPK does your nuts that you use a all in one mix or is it a 2 or 3 part mix?? This means that your Micro is in one bottle and Grow is in another and bloom in another. What you do is depending on Veg or Flower u will mix your feed according to veg or flower. U will have different strenght according to your week or Veg or Flower and your mix will be in differnt ratios of feed during Veg and Flower. And Example.
Veg.
Micro=3ML per L (15ML/5gallon) Grow=3ML per L (15ML/5gallon) Bloom=3ML per L (15ML/5gallon) -use this for your frist few feeds. Than u can increase strenght such as;

Micro=10ML per L (50ML/5gallon) Grow=75ML per 5 gallon, Bloom 15ML per 5gallon (this is the max I use in Veg.) I also have intermediate stages between these feeds. I use a 3:2:1 and than a 1:2:3 program for my outline... I can explain this if you are interest in Private msg etc... Or if you are interested in feed program i can let u know about mine and u can see what works for u..

And example of Flower would be: Micro-50ML/5gallon, Grow 15ML/5gallon, Bloom-75ML/5gallon. I would use this for the first few weeks and then cut the grow right out.. Now it may look lke Mirco-50ML or 60ML (depending) and bloom would increase to 90ML.. I use carbload and other stuff, but I dont want to get to tehcnical.. Most poeople do that to often and think they are having success and they are not lol.. Esspecially those that use stuff like h202 with out accualy nowing how to use it properly.. What marketers do is try and have some product for everything and people buy into the bullshit. lol.

About your (N) I know what they say about having low N levels in flower.. That is why my program goes from raito of 3:2:1(veg) to a 1:2:3 (flower-1 being the lower level of (N) in flower) These are the Raitios that I would mix the 3 part feed program togeather.. I wanted to just bring up an artical I read about accually increasing your levels of N during flower with leafy plants such as pot.. I did use a product called Okanogan Blend, made in the Okanogan in British Columbia, Canada (were I live) and the local univerisity came up with a hypothisis that increasing N by 10ML /5gallon per week in flower helps bud development; as long as, your (K)-potassam has been increased by the right raitio... And than recently another artical I read stated the same thing.. Both were researching Cannabis. It was a food for thought..
So here is something quick. If u are having yellowing and brown spots-deteriation around the leaves, u most likely are lacking K in your plants diet. and U probably need to make sure u are giving it them apporperitly..
Do u use a pH pen and TDS pen? And when it comes to mixing two differnt brands of fret, it is usually not a good idea, since they all have higher and lower qualities of ingredients as well as some tend to be cheaper and therefor you will not get a balanced diet for your plants..
Anyways, keep in touch.

Hi again

I am struggling with this problem but in vain. I added CaCO3 to rise ph. I also sprayed plants with MgSO4. Cause all symptoms look like S and Ca deficiency. I enclosed new pictures showing leaves. Now my plans are in advanced flowering stage, tops are quite nice but I would probably have lower harvest due to this problem. I have another idea. That it could be some insects fault. And rather small like saprophyte. Is it a good idea to use insecticide at flowering stage???

Looks like heat burn to me.

maybe foliar feeding with the lights on and they got burnt

Well it's personal oninion if its a good idea. How long are u in flower? Once the hairs start I do not like to spray them. U can spray them if you want, I just dont like to damage them. U have about 1month before the end of your harvest u should not spray. U can get away if you use Soy'ra nora. It's organic and I use it on my plants.. It's a soy extract. U can wash your fruits with it.. Now it' works better than ny inscectitced I have tried-besides the stuff I can get my hands on now good comerical stuff Anyways, get soy'ranora!!! Its safe to use on clones and in flower!

Cannot be. I am not using artificial light. Plants are kept inside room next to window. I would rather expect light deficiency If that is what You mean by heat burn.

I am in flowering for one month. In my country I cannot get this stuff with soy. We have other old/traditional methods for bugs. One is extract from garlic sprayed on plants. Other is extract from nettle. Both as You can imagine are spicy and may repel insects. But they may or may not damage flowers. What exactly is this soy stuff? Can I make it on my own. Is it kind of oil. I google Soy'ra nora but no matches.

Hum. I google it too and I had no luck-best I could find is some description on how soy bean helps but its the same idea with the product. Neem oil work's for your garlic, but smells like the worlds grosses croch! I have heard of both that u want to use I have not used them.. I once tried a mixof ISOpro alcohol + H202+ Dish soap. Strong as mix =hard on the hands, but it's fine on the plants.. It was suppose to kill eggs too. Well It did but VERY few lol. Most survived. The buggs died about 80%.. I think we also added neem oil, not sure.. This was a mix we got from Jeorge. Anyways, Sorry i cannot help anymore- except go get your hands on the Marijuwana grow bible and look up the stuff in their-he gives recipes from item u can get around the kitchen and stores..

May I ask what you keep your pH at? I've found that during times of heat stress, the plants prefer a slightly higher pH. In my case, I've found my plants' sweet spot as far as that goes. It's 6.2-.3, and I use rockwool. Most threads will suggest a pH of 5.5 to 6.3, and while at times I've had the pH lower, I've noticed different types of growth with varying pH's. IMO, when under heat stress, the plant will tend to yellow a bit (new growth) and won't have the chlorophyll to "protect" it as well at lower pH levels. 5.5 is far too low in the case of my plants during hot periods. During cooler periods, a lower pH is fine, and more optimal for the uptake of phosphorous. My advice is to add some nitrogen (ammonium), raise your pH, and perhaps just a little fulvic acid. That should green your plants up.

That is a problem. I don't use any pH meter. This is my first growing endeavor I only have 6 plants that's why did not invest in buying it. Another thought. Could all this damage be caused by lack of fresh air and to high temperature? I keep my window opened during light period. But when I darken my room I have to close window so there is no ventilation overnight. Usually when I come in the morning room is a bit stifling. During light period room is ventilated very well.