Brown/yellow marks on leaves

[Marijoohan]

Hi everyone. 

 

Can anyone one shed some light on what these brown/yellow marks are and a way to get rid of them?

I’ve read that they could be nutrient burn or the incorrect ph of the soil. But ph is between 6 and 6,5. Measured with a ph probe. And I’m giving them the minimum dose of 2ml per liter of nutrients. Giving nutrients one watering and the ph balanced the next. So alternating between the two.

 

TIA.

[greenkush]

Nutrient burns from the looks of it, the last pic looks like you dropped some water that rolled down the leaf.

Edited October 29, 2018 by greenkush

[420SA]

First and 3rd pic looks like damage from some type of worm. Probably a small caterpillar. Can we see a pic of your whole plant

[Marijoohan]

On 10/29/2018 at 11:17 PM, 420SA said:

First and 3rd pic looks like damage from some type of worm. Probably a small caterpillar. Can we see a pic of your whole plant

Sorry it’s taken so long but here you go. It seems to be getting worse too.

[CG420za]

I'm thinking its nute burn of sorts, I could be wrong. I've had those lines on one or two of my leaves in previous grows, I've never had a caterpillar in my cab.

[420SA]

What medium are you growing in and what are you feeding?

[Green Leaf Organics]

The lines are leaf miners and the other marks look like wind burn . That plant also is either hungry or has a ph issue as well.

Cheers

Reaf

[Marijoohan]

2 hours ago, 420SA said:

What medium are you growing in and what are you feeding?

Freedoms soil and feeding bio-grow

[Marijoohan]

9 minutes ago, Green Leaf Organics said:

The lines are leaf miners and the other marks look like wind burn . That plant also is either hungry or has a ph issue as well.

Cheers

Reaf

I feed them every two days and tested thre ph again this morning. It’s between 6 and 7. I’ll look into leaf miners.

[Marijoohan]

Also started using neem oil recently. Could that have something to do with it?

[Green Leaf Organics]

The burn could definately be from neem . What biobizz are u feeding and how much per l . What are u checking / correcting ph with?

[Marijoohan]

28 minutes ago, Green Leaf Organics said:

The burn could definately be from neem . What biobizz are u feeding and how much per l . What are u checking / correcting ph with?

I’m using bio bizz bio grow and checking ph with a soil probe. I haven’t had to correct the ph because it’s always been between 6 and 7

[Green Leaf Organics]

Those soil probes are useless , never seen one that does't read between 6-7 lol. If you using biobizz your ph should be around 6 which is fine . I think she just may be hungry. How much biogrow are u putting per L

[Marijoohan]

7 minutes ago, Green Leaf Organics said:

Those soil probes are useless , never seen one that does't read between 6-7 lol. If you using biobizz your ph should be around 6 which is fine . I think she just may be hungry. How much biogrow are u putting per L

1ml per L. They are 20L pots so I feed 2L at a time so 2ml per 2L

[Green Leaf Organics]

Theres your issue bud. You need to up the feed to at least 2ml per L and when you water water enough until you see run off out the bottom , wait for the pot to dry out and repeat . At 2l every few days you are not letting the medium cycles wet and dry and getting salt build up from the biobizz. You need to get runoff to keep the salts in the medium under control otherwise it builds up which is what is happening to you. 

[Marijoohan]

17 minutes ago, Green Leaf Organics said:

Theres your issue bud. You need to up the feed to at least 2ml per L and when you water water enough until you see run off out the bottom , wait for the pot to dry out and repeat . At 2l every few days you are not letting the medium cycles wet and dry and getting salt build up from the biobizz. You need to get runoff to keep the salts in the medium under control otherwise it builds up which is what is happening to you. 

I guess I was so worried about overwatering and nutrient burn that I induced it myself. Facepalm. How often do you think I should repeat this process? Should I keep watering every 2 days? And should I stick to alternating between nutrients and ph balanced water or no?

thanks for you help btw.

[greenkush]

55 minutes ago, Marijoohan said:

I guess I was so worried about overwatering and nutrient burn that I induced it myself. Facepalm. How often do you think I should repeat this process? Should I keep watering every 2 days? And should I stick to alternating between nutrients and ph balanced water or no?

thanks for you help btw.

You water when your pot feels lighter and the few top cm's of the soil is dry, always ph balance your water. Do not alernate nutrients, biobizz fishmix is enough for veg, you can include some fulvates if you want.

[Green Leaf Organics]

You dont need to ph balance your water in organic . After adding biobizz your water will be on the acidic side but the medium will buffer it up to the correct ph

[Marijoohan]

I think I’ve got it. Thanks for all the help

[420SA]

This pic below is of a plant infected with leaf miners. Tiny green worms, almost transparent. There may have been one on your plant that's now gone. edit: I see GLO did point this out

 

That other burn could very well be from the neem. I've seen very similar after spraying neem, there's a burn and there's sometimes deforming.  I just use half the recommended dosage now.

[Bainman]

This pic below is of a plant infected with leaf miners. Tiny green worms, almost transparent. There may have been one on your plant that's now gone. edit: I see GLO did point this out

 
That other burn could very well be from the neem. I've seen very similar after spraying neem, there's a burn and there's sometimes deforming.  I just use half the recommended dosage now.

Hi there. I would get out my Spinosad and give your suffering plant a fine spray, top and bottom.


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[Chong]

Dud you have leaf miner's they mine in the middle of the elave causeing those lines, they are quite hard to get rid of because they are inside the leaf, take it off before they move to the stem.

 

Do some searching on google how to get rid of leaf miners from your cannabis plants

[Marijoohan]

48 minutes ago, Chong said:

Dud you have leaf miner's they mine in the middle of the elave causeing those lines, they are quite hard to get rid of because they are inside the leaf, take it off before they move to the stem.

 

Do some searching on google how to get rid of leaf miners from your cannabis plants

Yeah. It looks like a little bit of neem oil has sorted them right out.

[Green Leaf Organics]

That plant is looking much happier bud.

[Chong]

9 minutes ago, Marijoohan said:

Yeah. It looks like a little bit of neem oil has sorted them right out.

Nice ! When did you plant those babies? They enjoying the African climate i see

[Marijoohan]

39 minutes ago, Chong said:

Nice ! When did you plant those babies? They enjoying the African climate i see

Thanks. It’s a auto that I planted at the end of November.