@article{juba_bradley_notz_southern_sorenson_2007, title={Effect of tobacco budworm (Lepidoptera : Noctuidae) infestation level on budworm-resistant and susceptible varieties of flue-cured tobacco in north Carolina}, volume={100}, ISSN={["0022-0493"]}, DOI={10.1603/0022-0493(2007)100[801:EOTBLN]2.0.CO;2}, abstractNote={Abstract Field experiments were conducted from 1972 to 1978 and from 1998 to 1999 to evaluate tobacco budworm,Heliothis virescens (F.) (Lepidoptera: Noctuidae), larval feeding on flue-cured tobacco,Nicotiana tabacum (L.), yield in eastern North Carolina. In the earlier studies, using variety Coker 319, treatment plots were evaluated when either 0 or 100% of plants in a plot were infested withH.virescens larvae. Treatment differences based on actual yield loss (kilograms per hectare) were compared with estimations of yield loss based on leaf consumption and leaf loss. Results indicate actual yield loss when 100% of plants were infested was less than the corresponding estimates of yield loss. In the later experiments, two tobacco budworm-resistant lines, ‘CU 263′ and ‘CU 370′, were compared with a commercial susceptible variety, K 326, when 0, 10, 20, or 40% of plants were infested (1998) and 0, 10, 40, 75, or 100% of plants were infested (1999). Although significant increases in leaf equivalents consumed were associated with infestations exceeding the recommended threshold, differences were not detected for yield (kilograms per hectare), quality (dollars per kilogram), and value (dollars per hectare) within each tobacco line. Additionally, there was not a significant correlation between value and infestations level for any of the tobacco lines. These results provide economic support for tolerance of a higher treatment threshold. Although K 326 sustained more leaf equivalent loss than CU 263 and CU 370, the value of K 326 harvested was higher than that of CU 263 and CU 370. To justify use of resistant varieties, the combination of pest pressure and the benefit of host plant resistance must be greater than the capacity of a susceptible variety to produce competitive yields, despite sustaining significantly higher loss.}, number={3}, journal={JOURNAL OF ECONOMIC ENTOMOLOGY}, author={Juba, Thomas R. and Bradley, J. R., Jr. and Notz, Armando and Southern, P. Sterling and Sorenson, Clyde E.}, year={2007}, month={Jun}, pages={801–807} }
 @article{long_vargo_thorne_juba_2006, title={Genetic analysis of breeding structure in laboratory-reared colonies of Reticulitermes flavipes (Isoptera : Rhinotermitidae)}, volume={89}, number={4}, journal={Florida Entomologist}, author={Long, C. E. and Vargo, E. L. and Thorne, B. L. and Juba, T. R.}, year={2006}, pages={521–523} }
 @article{vargo_juba_deheer_2006, title={Relative abundance and comparative breeding structure of subterranean termite colonies (Reticulitermes flavipes, Reticulitermes hageni, Reticulitermes virginicus, and Coptotermes formosanus) in a South Carolina lowcountry site as revealed by molecular markers}, volume={99}, ISSN={["0013-8746"]}, DOI={10.1603/0013-8746(2006)99[1101:RAACBS]2.0.CO;2}, abstractNote={Abstract There are several species of subterranean termites in the United States, some of which occur sympatrically over broad geographic regions. However, there is little information on the relative abundance of the different species or the extent to which they differ with respect to colony social and spatial organization. We used microsatellite markers to investigate the relative numbers of colonies, to infer colony breeding structures, and to delineate colony foraging areas in four species of subterranean termites occurring in a state park in Charleston, SC. The two most abundant species, Reticulitermes hageni Banks and Reticulitermes flavipes (Kollar), which together accounted for 80% of the 49 colonies sampled, had fairly localized foraging ranges of <30 m across. In contrast, Reticulitermes virginicus (Banks) and the Formosan subterranean termite, Coptotermes formosanus Shiraki, had far fewer colonies, but these colonies were more expansive, spanning distances >100 linear m. Colonies of all species were primarily simple families each headed by a single monogamous pair of reproductives. Generally, the remaining colonies of each species were consistent with being extended families, i.e., headed by multiple neotenic reproductives descended from simple families. Only in R. flavipes was a mixed family colony detected, with workers from two distinct families occurring together. These results from molecular markers reveal how the various species in a relatively diverse subterranean termite community can vary in abundance, size of colony foraging area and breeding structure, thereby setting the stage for subsequent studies to identify the factors shaping these communities.}, number={6}, journal={ANNALS OF THE ENTOMOLOGICAL SOCIETY OF AMERICA}, author={Vargo, Edward L. and Juba, Thomas R. and Deheer, Christopher J.}, year={2006}, month={Nov}, pages={1101–1109} }