Field-based Evidence of the Black Coffee Twig Borer infesting Maesopsis eminii in Coffee Agro-systems in Kiboga District, Uganda

  • Godfrey Kagezi
  • Patrick Kucel National Coffee Research Institute (NaCORI), National Agricultural Research Organisation
  • Lillian Nakibuule National Coffee Research Institute (NaCORI), National Agricultural Research Organisation
  • Judith Kobusinge National Coffee Research Institute (NaCORI), National Agricultural Research Organisation
  • Allan Paul Katondi National Coffee Research Institute (NaCORI), National Agricultural Research Organisation
Keywords: Agroforestry-systems, alternative-hosts, coffee, insect-pests.

Abstract

Despite Ugandan coffee farmers’ preference for Maesopsis eminii as a shade tree, the species is an alternate host for the black coffee twig borer, Xylosandrus compactus (Eichhoff)—a major insect pest of coffee in the country. Wilting and drying of leaves and branches of young M. eminii trees (<5 m tall) observed in Kiboga District, Uganda. The branches were trimmed off the trees, separated into primary and secondary branches and then the percentage of those possessing characteristic X. compactus entry holes determined separately. Additionally, the number of entry holes on both primary and secondly branches was established to determine the extent of damage of X. compactus. X. compactus characteristic holes were observed on both primary and secondary branches of M. eminii - percentage of branches having entry holes and the number of entry holes higher on primary than secondary branches. Dissecting the branches at the entry holes revealed various life stages of X.compactus in the gallery, proving that the damage was due to the pest. Presence of this pest on trees that are inter-planted in the coffee agroforestry systems presents a dilemma in managing it. Therefore, research should be geared towards designing management strategies for the pest in the coffee agroforestry systems. In the meantime, farmers should always trim-off and burn all infested parts from coffee and other plants inter-planted in it.

Published
2020-11-05
Section
Articles

Journal Identifiers


eISSN: 2410-6909
print ISSN: 1026-0919