Iowa Department of Natural Resources forest health technician Mark Runkel (right) and GIS specialist John Mullen (left) look for trees last Monday exhibiting signs of the oak wilt fungus at Hickory ...
Oak wilt is a potentially deadly disease caused by the fungus Bretziella (formerly Ceratocystis) fagacearum. First discovered in the 1940s in the Mississippi River Valley area, the disease is found ...
Some results have been hidden because they may be inaccessible to you
Show inaccessible results