Stem abnormalities and lesions

Several parasitic and non-parasitic diseases may cause various symptoms on tobacco stem. They are occasionally accompanied by other characteristic symptoms occurring in other organs of tobacco. It is often easier to make your diagnosis by observing these organs, and that is why we recommend to refer to the relevant fact sheets.

In this fact sheet we present the disease symptoms which may occur only on the stem, without other lesions in other organs.
 

Some of the non-parasitic diseases may be responsible for the physiological split,  fasciation of the stem, "scabby stalk", collapse of the internal tissues ("lightning") and other symptoms caused by different chemical injuries.