TY - JOUR AU - Chi NM, AU - Quang DN, AU - Anh NT, AU - Giang BD, AU - Anh CN, PY - 2023/01/16 Y2 - 2024/03/29 TI - DISEASE RESISTANCE OF EUCALYPT CLONES TO CERATOCYSTIS MANGINECANS JF - Journal of Tropical Forest Science (JTFS) JA - JTFS VL - 35 IS - 1 SE - Articles DO - UR - https://jtfs.frim.gov.my/jtfs/article/view/2210 SP - 1-9 AB - <p><em>Ceratocystis manginecans</em> is causing serious damage to <em>Eucalyptus</em> plantations in Vietnam. When the stems of 8-month-old ramets of two widely-planted <em>Eucalyptus</em> clones were inoculated with nine <em>C. manginecans</em> isolates in a nursery trial, all caused disease. Using the same methodology, the two most pathogenic isolates were used to rank the resistance of 18 <em>Eucalyptus</em> clones. Significant (p &lt; 0.001) differences among clones were observed for both lesion length and percentage mortality, 90 days after inoculation. Three<em> Eucalyptus </em>hybrid clones and seven<em> E. urophylla</em> clones were highly resistant, with mean lesion length from 0.99 to 2.75 cm and mortality ranging from 0 to 5.0%. The remaining eight clones, including the two clones used to screen the <em>C. manginecans</em> isolates, displayed low to moderate resistance with mean lesion length exceeding 5 cm and mortality ranging from 15.0 to 41.7%. This suggests that there are opportunities to deploy <em>Eucalyptus</em> hybrid and <em>E. urophylla</em> clones, resistant to <em>C. manginecans</em>, to enhance disease resistance through crossing among resistant genotypes.</p> ER -