chlorosis veins

[ramse]

chlorosis began a few days ago... the plant is entering bloom

yellowing starts from the veins, leaving the green lamina... the opposite with respect to a typical deficiency of nitrogen or magnesium

I tried to apply nitrogen through the leaves and to increase irrigation, but it does not seem to improve

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photos of the plant: https://www.icmag.com/ic/showthread.php?t=362746&page=5

 

[Lost in a SOG]

Are these all yellowing from the bottom?

What is the top growth doing?

Whats in the ground?

Possibly too high a soil pH. Micro lockout leading to a larger issue possibly..

 

[ramse]

yes from bottom
or the old leaves that are halfway up the branches

the growth at the top is healthy

 

[Lost in a SOG]

That leaf makes me think potassium deficiency rather tha N, its uneven, patchy and some browning at the edge. Shes a big girl with a lot of bud sites and will want a lot of potassium. Might just be scavaging from leaves that now arent getting as much sunlight.

Hopefully some other people chime in but the rest of her looks great.

 

[ramse]

Whats in the ground?

the soil is an organic mixture, with neem, organic pellets and chicken manure.

On August 1, to avoid deficiencies in the pre-flowering and flowering phase, I fertilized with 100 grams of organic pellets Aptus N-P-K-Ca-Mg-S 6-3-14-8-1-4

 

[ramse]

That leaf makes me think potassium deficiency rather tha N, its uneven, patchy and some browning at the edge. Shes a big girl with a lot of bud sites and will want a lot of potassium. Might just be scavaging from leaves that now arent getting as much sunlight.

that leaf is not very representative of the problem ... it is the only one that in addition to chlorosis also shows necrosis

 

[Mr. J]

Just feed it more. Seriously, that's it.

 

[ramse]

Just feed it more. Seriously, that's it.

I too have thought of a lack of nitrogen... but I've never seen it develop in this way, usually chlorosis is between veins while veins stay green

 

[Mr. J]

Either way the best approach would be to try the simplest fix first, which I think would be to hit them with a good dose of an all around fertilizer (NPK, micro) and wait a few days to see if the yellowing stops progressing.

 

[ramse]

we hope it's just a simple deficiency... I have the paranoia that yellowing is due to root aphids

I have examined numerous threads, Internet sites, books etc ... and I have not found an image of nitrogen or magnesium deficiency with chlorosis of the veins in the initial stage

while I saw some threads with root aphid problems showing similar symptoms, vein yellowing etc...

what do you think?

 

[Mr. J]

we hope it's just a simple deficiency... I have the paranoia that yellowing is due to root aphids

I have examined numerous threads, Internet sites, books etc ... and I have not found an image of nitrogen or magnesium deficiency with chlorosis of the veins in the initial stage

while I saw some threads with root aphid problems showing similar symptoms, vein yellowing etc...

what do you think?

I couldn't tell ya, never had to deal with root aphids myself. About the particular chlorosis you're experiencing, it could be suffering from one deficiency or another or a combination of two or more. That's why I thought a decent all around feed might clear things up. If it's root aphids then I don't know, can't help ya.

 

[therevverend]

I too am thinking N deficiency. It looks like the plants are flipping over into flowering, stealing the N out of the older leaves to push flowering.

 

[slownickel]

The plants are hungry. N, S, K and even P deficiencies are visually present. I would throw in Ca cause it is almost always deficient.

 

[Mr. J]

Three votes for hungry. Feed them ladies.

 

[Flying Monkey]

Hey Ramse- saw this in the outdoor thread and weighed in there but since a few more heads are together here- I wondered about Fe. More likely to be showing top of the plant than lower down though. A few of your other photos looked a bit light in the new growth.

Theyre largish girls- theyl be through the raised bed by now well and truely so your native soils important to have a think about.

Are they limestone boulders behind them.

Theyre looking pretty good on the whole so i wouldnt be worrying too much yet. Bugs are possible but its just as likely to be a bit of a virus or nutes.A foliar feed with something balanced couldnt hurt in the short term. Id be hitting the lucerne/kelp teas first.

 

[ohimaria]

I have the same problem, every day I see the plant cannibalize at least 5-6 leaves and they fall on the ground, i use local ground and bland nutriment of fish mix, the ph of water and ground is high.

in a plant of the same strain but more smallest (less hours of sunshine), I don't have the problem.

 

[Mr. J]

in a plant of the same strain but more smallest (less hours of sunshine), I don't have the problem.

That's because the nutritional demands of the smaller plant receiving less light are less than the needs of the big plant. The big plant is growing and it wants more food. If you don't give it, she'll just eat herself from the bottom up.

 

[ramse]

Thank you all for your help

today I removed all the mulch and I checked the ground in search of aphids, larvae etc.., fortunately I didn't notice anything

I applied a handful of organic fertilizer in pellets and irrigated with biobizz bio bloom

we will see how the situation evolves...

then I spent a couple of hours sniping at the brown marmorated stink bug (Halyomorpha halys)
this bug has been present in Italy for only a few years and is becoming a real scourge for farmers. It has no natural predators and the allowed pesticides don't do much...

these damn bugs and grasshoppers are nibbling at me a lot of leaves

Halyomorpha halys:

 

[ramse]

Theyre largish girls- theyl be through the raised bed by now well and truely so your native soils important to have a think about.
Are they limestone boulders behind them.

under the mound there are 20-30 cm of calcareous-dolomitic soil. From this land high-class wines are born, we will see what the ganja will look like... It is the first time that I cultivate on this side I usually used more calcareous-clayey slopes

 

[Flying Monkey]

Well thats interesting... Probably rich soil but tending to basic in the soil profile where theres less humic acids. She'll have her roots down in the lime gravel by now. If things dont bounce back with the general feed you gave her id consider an iron chelate too. First pic looks a like the new growths a bit pale too unless thats bug impacts.