National Plant Diagnostic Network National Newsletter Pest/Pathogen Newsletters Posted On October 29, 2015 Resource National Plant Diagnostic Network Monthly National Newsletter Links: Visit Here MORE RESOURCES: Opportunities to Learn Bartlett: Root Collar Disorders Wednesday July 8, 2020 The root collar is part of the tree’s trunk and requires the movement of oxygen and carbon dioxide in and... READ MORE Opportunities to Learn Bartlett: Ticks Wednesday June 10, 2020 There are about seventy-five species of ticks in the United States, present in nearly all habitats. In most regions of... READ MORE Education/Interpretation Managing Oak Wilt Disease Wednesday May 13, 2020 Oak wilt is a lethal disease that affects all native oak species in the eastern half of the United States.... READ MORE Pest/Pathogen Newsletters Newsletters, Listservs, and Links of Interest Friday November 13, 2015 Links of Interest: APHIS's Hungry Pests Site (FAQ pages, photos, pest tracker maps, reporting & mgmt tips) Center for Invasive... READ MORE