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Oak wilt threat to trees in Iowa
Iowa State University extension plant pathologist A H Epstein warns oak wilt is spreading in the north central USS region. The fungus blocks water vessels and forms pressure pads that release spores via insects. Root grafts between nearby oaks enable rapid spread, risking death of dense stands. Diagnosis requires lab culture. collect branch specimens and consult the county extension office for oak wilt details. Implement pruning limits and wound care to slow spread. remove and destroy diseased trees before spring.
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Iowa
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A. H. Epstein
Iowa State University
Rs. Development Us
Epstein
Oak Wilt