J. Cartledge

Notes From Harvard Forest

Yellowing Palm Disease: Checking Xylem Pressure

2017

hand-colored collograph, linocut, photolitho and drypoint & roulette on paper

20" x 15"

A study done in the 1970s, at a satellite site in Florida, describing the pathology of yellowing palm disease, and a method of early diagnosis. The xylem pressure in diseased trees does not fluctuate, which stops nutrient circulation in the tree.