Need some help identifying what’s causing spots on leaves
2 of my smaller plants have these brown and yellow spots on the leaves. I'm thinking it's Alternaria Canker after looking at the linked resources for the sub, but im not entirely sure. Appreciate any insight.
by L_aW
2 Comments
Sad-Shoulder-8107
My best guess would be septoria leaf spot.
tomatocrazzie
This looks more like nutrient deficiency more than a disease, although nutrient deficiency weakens the plant and can lead to that.
And it looks like multiple deficiencies. If you haven’t done so recently, you can fertilize with a tomato fertilizer with micronutrients.
But does not necessarily mean your soil is deficient, just that the plant can’t absorb the particular nutrients. This can be due to soil pH or the presence of some positive ions in high concentrations, creating a nutrient lockout.
This is also pretty common in old plants that are shutting down at tje end of the season. While tomatoes technically can hold over for multiple seasons if they are not killed by disease or frost, fruit production can stress them to they point they basically shut down. If you are at tje end of your season, that is what I suspect is happening. If you are mid to early season, you need to fertilize ASAP.
2 Comments
My best guess would be septoria leaf spot.
This looks more like nutrient deficiency more than a disease, although nutrient deficiency weakens the plant and can lead to that.
And it looks like multiple deficiencies. If you haven’t done so recently, you can fertilize with a tomato fertilizer with micronutrients.
But does not necessarily mean your soil is deficient, just that the plant can’t absorb the particular nutrients. This can be due to soil pH or the presence of some positive ions in high concentrations, creating a nutrient lockout.
This is also pretty common in old plants that are shutting down at tje end of the season. While tomatoes technically can hold over for multiple seasons if they are not killed by disease or frost, fruit production can stress them to they point they basically shut down. If you are at tje end of your season, that is what I suspect is happening. If you are mid to early season, you need to fertilize ASAP.