Submitted to: National Meeting of Entomological Society Of America
Publication Type: Other
Publication Acceptance Date: 6/30/2006
Publication Date: 12/20/2006
Citation: Arthur, F.H. Influence of growing location and variety on lesser grain borer (Coleoptera: Bostrichidae) and rice weevil (Coleoptera: Curculionidae) infestation of rough rice [abstract]. National Meeting of Entomological Society Of America, Indianapolis, IN, December 10-13, 2006.
Technical Abstract: Long-grain rice cultivars Cocodrie, Wells, and XP 723 grown in three locations, and medium-grain rice cultivars Bengal and XP 713 grown in two locations, were assayed for susceptibility to the lesser grain borer, Rhyzopertha dominica (F.), and the rice weevil, Sitophilus oryzae (L). Separate samples were also analyzed for physical characteristics of brown rice yield, % whole kernels, and kernel thickness, and also for head rice yield. Progeny production and feeding damage of the lesser grain borer was significantly different among long-grain cultivars within two of the three locations (P < 0.05), but not for location (P > 0.05), while progeny production of the rice weevil was different among varieties, location, and relative humidity (r. h.) (P < 0.05). On medium-grain rice, both cultivar and location were significant for progeny production of the lesser grain borer, while cultivar was significant for progeny of the rice weevil. On both rice types, feeding damage was usually correlated with progeny, but there was no correlation of progeny with the physical characters. Results indicate that the location and variety influence susceptibility to both the lesser grain borer and the rice weevil, but this susceptibility may be related to intrinsic differences between cultivars and conditions that affect the condition of the exterior hull or husk, rather than physical characteristics of the kernel.