Texas Arboretum: Oak Wilt All oaks (Quercus spp.) are
susceptible to oak wilt to some degree, but some species are
affected more than others. Red oaks, particularly Spanish oak
(Q. buckleyi), Texas red oak (Q. texana), Shumard oak (Q.
shumardii), and blackjack oak (Q. marilandica), are extremely
susceptible and may play a unique role in the establishment of
new oak wilt infections. White oaks, including post oak (Q.
stellata), bur oak (Q. macrocarpa), Mexican white oak (Q.
polymorpha), white shin oak (Q. sinuata var. breviloba), Durand
oak (Q. sinuata), Lacey oak (Q. laceyi), and chinkapin oak (Q.
muehlenbergii), are resistant to the fungus and rarely die from
oak wilt. Live oaks (Q. virginiana and Q. fusiformis) are
intermediate in susceptibility to oak wilt, but are most
seriously affected due to their tendency to grow from root
sprouts and form vast interconnected root systems that allow
movement (or spread) of the fungus between adjacent trees.
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