Pathogenicity of Ceratocystis manginecans in inoculated Acacia roots
Nguyen Minh Chi
Indian Phytopathology volume 75, pages 231–237 (2022)
Abstract: Acacia species have been grown in plantations for pulpwood and sawood in many countries of Southeast Asia. Wilt disease incited by Ceratocystis manginecans has become a threat to Acacia plantations. Management is currently focusing on Ceratocystis infection from stem or branch wounds. This study is the first to investigate the pathogenicity of C. manginecans in roots of an Acacia hybrid and A. mangium. Isolates of C. manginecans obtained from Acacia hybrid (2), A. auriculiformis (2), A. mangium (3), Chukrasia tabularis (3), Dalbergia tonkinensis (5), Eucalyptus urophylla (5) and soil (6) were tested for pathogenesity. All 26 isolales formed lesions in roots and stems of one-year-old plants. The most virulant isolates were from A. mangium, Acacia hybrid and soil. There were significant correlations between roots and stems in A. hybrid and A. mangium for lesion length (R2 = 0.93 and 0.91, respectively) and percent of dead plants (R2 = 0.80 and 0.74, respectively). As Acacia roots are susceptible to C. manginecans, root damage should be minimized in planting stock and after outplanting in the field.
