RT Journal Article
SR Electronic
T1 Phosphite Injections and Bark Application of Phosphite + Pentrabark™ Control Sudden Oak Death in Coast Live Oak
JF Arboriculture & Urban Forestry (AUF)
FD International Society of Arboriculture
SP 309
OP 317
DO 10.48044/jauf.2007.035
VO 33
IS 5
A1 Garbelotto, M.
A1 Schmidt, D.J.
A1 Harnik, T.Y.
YR 2007
UL http://auf.isa-arbor.com/content/33/5/309.abstract
AB In each of seven fully controlled experiments, potted California, U.S. coast live oak trees were artificially inoculated with Phytophthora ramorum, the agent of a tree disease commonly referred to as sudden oak death. Phosphites were applied to trees using a range of application approaches either as preventive or therapeutic treatments. Soil drenches and bark application of phosphites were ineffective; foliar application of phosphites amended with surfactants were effective only at times and always caused phytotoxicity. On the other hand, injections of phosphites and bark applications of phosphites + the organosilicate surfactant Pentrabark™ (Agrichem, Medina, OH, U.S.) were consistently effective in suppressing bark colonization by this pathogen without causing phytotoxicity. This is the first study describing the use of a chemical treatment amended with an organosilicate surfactant for topical bark applications.