Dear colleagues,
Two days ago the large sites of dead tissue at the tomato leafs were appeared. We have observed the leafs, there are no any parasites/pests. May be, it is problem with deficiency in calium?
Please help me.
Sincerely,
Mehdi Ali.
to know if the cause of these symptoms is physiological or biotic there is only one solution,isolate the pathogen, to purify and identify it and reproduce the same symptoms by reinoculating it with tomato leaf.if there is no pathogen , the cause is physiological, if you suspect the lack of a mineral for example calcium you give it to the young tomato plants grown in this soil
if the symptoms go away it means calcium is missing.
I suspect a viral infection !
Ofcourse not, definitely not a viral infection !
Not a insect infestation either and not bacterial or fungal infection. This is most probably the tomato leaf burn/tomato leaf scorch/sunburn.
I dont think , it is calcium deficiency or any other form of mineral deficiency. Most likely , the symptoms are the result of exposure to abiotic stress , could sun burn or water stress....
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