P&PDL Picture of the Week for
July 14, 2008

"Warty" Tomatoes

Rosie Lerner, Extension Consumer Horticulturist, Department of Horticulture and Landscape Architecture, Purdue University

This is "normal" for tomatoes, especially along the lower stem and they do have potential for developing into adventitious roots. Though there does seem to be an overabundance of the root initials in some of these pics, some tomato varieties are "wartier" than others and weather/stress can also play a role. Waterlogged soils can induce adventitious root development, 2,4-D and other growth regulators can be a factor, and also seems to be related to ethylene produced within the plant, etc. Often the stems will just remain very "warty" without actually developing "roots".

Photos courtesy of Tom Springstun, Floyd County Extension Educator

Click image to enlarge

Purdue Plant & Pest Diagnostic Lab Purdue Cooperative Extension Service