Brown spots on tomato plants

Tomato    None Given

I have noticed these sort of triangular shapes on several of my larger plants and was wondering what they are. My cherry tomatoes and sweet 100's are fine. Any help would be appreciated as this is my first attempt at a garden.

Posted by: Tracy Gregorc (1 point) Tracy Gregorc
Posted: July 24, 2016


I think it may be a physiological disorder called catface, where the fruits become deformed due to some damage that take place at flowering stage. Though it is very difficult to tell the exact reasons, some research indicates it may occur due to following reasons.
1. Exposure of plant to cool/cold temperature three weeks before bloom may cause this deformity.
2. In some varieties particularly indeterminate type, this deformity happens due to heavy pruning of growing points which results in lesser auxin in plants.
3. It may happen due to pesticide damage especially 2, 4- D (a herbicide).
4. The sucking insect like thrips may also cause this type of deformities.
5. Also excess watering coupled with poor drainage may causes catface symptom.

Posted by: Dr. Ravishankar Narayana (11 points) Dr. Ravishankar Narayana
Posted: July 25, 2016

It seemes boron deficiency to me. You need to provide some microelements within your nutrition solutions

Posted by: Lucia Anna Carbone (2 points) Lucia Anna Carbone
Posted: July 25, 2016

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