Unknown leaf damage

PolioLegs
PolioLegsstarted grow question 21d ago
Any ideas on what could be causing this leaf damage? I'm growing outside so I suspected it's some kind of pest. However, it's only occurring on two of my six plants. The two it's occurring on are the same strain, so maybe its a genetic/environment thing instead? Thanks! 😎
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Leaves. Other
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Nocone_Purple
Nocone_Purpleanswered grow question 19d ago
That patchy yellowing and physical leaf tearing looks like typical outdoor pest damage from sucking insects like leafhoppers, thrips, or plant bugs. Certain strains have softer leaf tissue or specific terpene profiles that attract bugs much more than others, which explains why only that specific strain is affected. Check the undersides of the leaves and the stems early in the morning or at dusk to catch the culprits active. Apply an organic treatment like Neem oil or insecticidal soap thoroughly during the late evening to avoid sun-burning the foliage. Keep a close eye on the new growth to ensure the damage has stopped spreading after your treatment.
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Organoman
Organomananswered grow question 22d ago
Bugs...........damage from some sort of "sap sucking" insect. Definitely not a fungal/bacterial disease or caused by a nutrient deficiency or any sort of weird root problem.
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PhiGrownacci
PhiGrownaccianswered grow question 22d ago
Hi Polio, fungal/bacterial leaf spot disease, possibly from too much moisture for too long (stagnation) above 77°F, happens incredibly easily if water doesn't move within a timeframe. Also, possibly a pest, although they are normally easy to spot, don't think it's manganese, although it could explain 2 of the 6, as some strains can have slightly different nutrient profiles, although manganese will always appear in new growth first, and it is difficult to tell from the limited photos the symptoms' mobility across the plant. Tropical conditions, tropical bacterial proliferation. Root suffocation or oxygen deprivation is medically referred to as root hypoxia. While it causes wilting, yellowing, and leaf drop, it does not directly cause physical holes in leaves. Instead, airless roots trigger a cascade of events that indirectly lead to leaf perforation. The lack of oxygen causes root cell death, allowing harmful fungi and bacteria to thrive in the soggy environment. This leads to root rot, which brings about leaf damage. Anthracnose, Shot Hole Disease, waterlogged soil, and stressed plants are perfect breeding grounds for fungi. These pathogens create, water-soaked spots on the leaves. As the diseased tissue dies and collapses, the centers of these spots fall out, leaving a "shot-hole" appearance. Suffocating roots lose their ability to absorb nutrients like potassium and calcium. Deficiencies cause leaf tissues to become weak, develop dry, dead spots, and eventually tear or fall out.
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