The extent to which vascular discolouration extends up the pseudostem of the tallest sucker should be determined by making cross-section cuts, from the base of the pseudostem upwards, and examining the internal tissues following each cut. The point at which discolouration is no longer visible should be noted and the distance from this point to the pseudostem base recorded. Extent of internal discolouration in corm of tallest sucker caused by Fusarium wilt - estimation entity variable_of scale_of acronym method_of attribute