Tomato split stem and bumps symptoms are usually linked to environmental stresses. Some reported about correlation with Fusarium, Verticillium wilt or Rhizoctonia root infection. Is there any experimentally proved link between those symptoms and pathogens? Symptoms are observed on greenhouse plants, so, there is no pesticides effect.
In the last decades the climatic changes, acid rains are some of the negative effects since the viruses are in the air these viruses fall to the plants producing infections to the plants in the case of the tomato the moment that the plant approximates this virus the plant an infection arises to the stem of the plant being able to fungus not only the stem but also all the parts of the plant until it dies.
Dear Dr. Alex Ignatov,
Such symptoms can also be caused by growth regulator herbicides (i.e. phenoxy herbicides) throughout the growing season.
Nicolò M. Villa Sorry, I made an addition to my question: Symptoms are observed on greenhouse plants, so, there is no pesticides effect.
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