help with tomato plants

NicolasGarcia · May 5, 2018

Good morning from Spain and thanks in advance, some of my tomato plants are put the lower yellow leaves and spots, someone knows what is due? Maybe it's that it has rained on tomato plants? Thank you.
Nico

bower · May 5, 2018

Hi Nicolas.
The white spots underneath the leaves certainly look like insect activity to me, so the brown spots could be feeding damage.
In the first picture, this plant is pale green but I notice the new leaves are darker. So this suggests to me a nitrogen deficiency, possibly brought about by transplant stress, and/or too much water, and needing to adjust to conditions in the field, ie the root growth has to catch up with the shoots after being moved out of a small container.
Some N-rich liquid fertilizer such as a fish emulsion may help, for plants that are pale.

Also as the plants begin to grow strongly, they are less vulnerable to pests or disease. IMO. So anything that strengthens the plants will help. Some pests are more attracted to a high-N growth but in this case it appears the trouble is worst on older leaves. That suggests to me that a feeding will help.

Nan_PA_6b · May 5, 2018

Nicholas, I don't know what it is. But if they were my plants I would cut off all the parts with spots. Then, wash your hands and the scissors, in case it is disease.

Nan

ginger2778 · May 5, 2018

Septoria leaf spot due to the rain is the brown spots, the yellowing is overwatering and not enough nitrogen.After removing leaves with brown spots, use a fungicide like liquid copper for the Septoria, at 1/2 of the weakest recommended strength. Use 1 Tablespoon Epsom salt per gallon of water for greening up the leaves, but wait for it to dry out first.

NicolasGarcia · May 6, 2018

Good morning, thank you very much for your help, a friend in Spain has recommended me 3% hydrogen peroxide and reduced with water .20% peroxide and the rest of rainwater to fight the fungus, I did not know the salt of epsom to try ..... thank you very much again and have a good day.
Nico

NicolasGarcia · May 6, 2018

Epsom salt is used sprayed on the leaves? or directly on the land where the tomato is? Thank you

ginger2778 · May 6, 2018

Quote:

Originally Posted by NicolasGarcia

Epsom salt is used sprayed on the leaves? or directly on the land where the tomato is? Thank you

Epsom salt us magnesium sulfate. Not sprayed, soaked directly into the land is the way. 1 Tablespoon dissolved into 1 gallon water.

NicolasGarcia · May 6, 2018

OK thank you very much

zipcode · May 6, 2018

I think the root system is not established yet. All sort of deficiencies appear after transplanting, especially in cold soil (I assume your soil is not cold though?), and it's just the incapacity of the plant to uptake well. You just need to wait.

NicolasGarcia · May 7, 2018

Thank you very much
Nico

May 5, 2018	#2
bower Tomatovillian™ Join Date: Feb 2012 Location: Newfoundland, Canada Posts: 6,794	Hi Nicolas. The white spots underneath the leaves certainly look like insect activity to me, so the brown spots could be feeding damage. In the first picture, this plant is pale green but I notice the new leaves are darker. So this suggests to me a nitrogen deficiency, possibly brought about by transplant stress, and/or too much water, and needing to adjust to conditions in the field, ie the root growth has to catch up with the shoots after being moved out of a small container. Some N-rich liquid fertilizer such as a fish emulsion may help, for plants that are pale. Also as the plants begin to grow strongly, they are less vulnerable to pests or disease. IMO. So anything that strengthens the plants will help. Some pests are more attracted to a high-N growth but in this case it appears the trouble is worst on older leaves. That suggests to me that a feeding will help.

May 5, 2018	#3
Nan_PA_6b Tomatovillian™ Join Date: Dec 2016 Location: Pittsburgh, PA Posts: 3,194	Nicholas, I don't know what it is. But if they were my plants I would cut off all the parts with spots. Then, wash your hands and the scissors, in case it is disease. Nan

May 5, 2018	#4
ginger2778 Tomatovillian™ Join Date: Aug 2011 Location: Plantation, Florida zone 10 Posts: 9,283	Septoria leaf spot due to the rain is the brown spots, the yellowing is overwatering and not enough nitrogen.After removing leaves with brown spots, use a fungicide like liquid copper for the Septoria, at 1/2 of the weakest recommended strength. Use 1 Tablespoon Epsom salt per gallon of water for greening up the leaves, but wait for it to dry out first.

May 6, 2018	#5
NicolasGarcia Tomatovillian™ Join Date: Jan 2018 Location: España Posts: 453	Good morning, thank you very much for your help, a friend in Spain has recommended me 3% hydrogen peroxide and reduced with water .20% peroxide and the rest of rainwater to fight the fungus, I did not know the salt of epsom to try ..... thank you very much again and have a good day. Nico

May 6, 2018	#9
zipcode Tomatovillian™ Join Date: Jun 2010 Location: Romania/Germany , z 4-6 Posts: 1,582	I think the root system is not established yet. All sort of deficiencies appear after transplanting, especially in cold soil (I assume your soil is not cold though?), and it's just the incapacity of the plant to uptake well. You just need to wait.

May 7, 2018	#10
NicolasGarcia Tomatovillian™ Join Date: Jan 2018 Location: España Posts: 453	Thank you very much Nico