Summer Branch Drop    (View PDF)

Richard W. Harris

Abstract: Apparently sound limbs occasionally break out of mature trees during calm summer weather. Species of at least 19 genera are susceptible. This is particularly puzzling since normally limbs would be lighter in weight during times of high transpiration. High xylem pressure and/or weakening of the cell wall bonding in the xylem accompanied by increased limb weight may be responsible.

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https://doi.org/10.48044/jauf.1983.028