@article {Jackson94, author = {Marcus B. Jackson and Robert W. Stack}, title = {Effects of Dicamba Herbicide on Tubercularia Ulmea Canker Development}, volume = {28}, number = {2}, pages = {94--98}, year = {2002}, doi = {10.48044/joa.2002.28.2.94}, publisher = {Arboriculture \& Urban Forestry (AUF)}, abstract = {Dicamba (3,6-dichloro-o-anisic acid) herbicide was applied to the roots of potted Siberian elm (Ulmus pumila) and Russian-olive (Elaeagnus angustifolia) trees in a greenhouse. Five herbicide concentrations were used: equivalent to rates of 0 (0), 93 (1/12), 140 (1/8), 280 (1/4), and 1,121 (1) g/ha (lb/ac) active ingredient. Two weeks after herbicide application, each tree was inoculated with a single isolate of the canker-causing fungus Tubercularia ulmea. The experiment was repeated using two different T. ulmea isolates. Leaf cupping, a symptom of dicamba exposure, was evident two to three weeks after herbicide application. Symptoms occurred at rates of 140 g/ha (1/ 8 lb/ac) and above in the Siberian elms and the 1,121 g/ha (1 lb/ac) rate in the Russian-olives. All four T. ulmea isolates caused cankers, with canker size differences between fungal isolates and between tree species. None of the herbicide treatments increased or decreased T. ulmea canker size.}, issn = {1935-5297}, URL = {https://auf.isa-arbor.com/content/28/2/94}, eprint = {https://auf.isa-arbor.com/content/28/2/94.full.pdf}, journal = {Arboriculture \& Urban Forestry (AUF)} }