Trees selected for artificial inoculation were chosen for their proximity to trees with active, naturally occurring oak wilt
is caused by a fungus, which is spread by both root grafts and insects.
For example, elms and oaks are best pruned during December, January or February to reduce the chance of Dutch elm disease and oak wilt
In addition, the WDNR and Wisconsin Council on Forestry (WCOF; 2016) recommend that stands with at least 15 ft2 acr[e.sup.-1] of oak (Quercus spp.) basal area not be harvested between early to mid-April and July 15 to avoid spread of oak wilt
(Ceratocystis fagacearum Bretz), a fungal disease affecting oak species.
Although research scientists are working on this problem, I am not aware of any way to cure or stop the spread of oak wilt
, which is spread by root grafts and insects.
Oaks, especially, when pruned during active growth, run the risk of sap escaping from the cutting site and the scent of fresh cut wood attracting oak borers, which are carriers of oak wilt
disease that can be fatal to any of the nearly two dozen species of oak native to Illinois.
Log exports from the United States have typically relied on methyl bromide fumigation as a phytosanitary treatment for the oak wilt
fungus and other pests of concern to foreign export markets (MacDonald et al.
Dormant or summer pruning is best; avoid pruning in mid-spring to early summer in areas where oak wilt
Most notable of these insect-spread maladies: oak wilt
. This devastating fungus disease is carried by sapsucking beetles to open wounds in oak trees.