The chlorosis is a yellowing of leaves because of a lack of chlorophyll, the plant with this disease has little to no ability to make carbohydrates through photosynthesis, dying if not treated or acquiring the rust disease as a consequence. The planting with the diseased plants can then end uo perishing, because their will not be able to acquire its nutrients and this can generate a chain effect if left untreated, Mr. M probably will lost of the tomatos, bacause they will not be well developed.