Entomology Home > Faculty & Staff > Dr. John Bernhardt
Dr. John Bernhardt
Research Assistant Professor
Rice Entomology
Address
Department of Entomology
University of Arkansas
Rice Research and Extension Center,
2900 Hwy. 130 East
Stuttgart, AR 72160
PHONE: 870.673.2661
FAX: 870.673.4315
E-MAIL: jbernhar@uark.edu
Education
- B.S. 1970 East Carolina University, Biology
- M.S. 1974 East Carolina University, Biology
- Ph.D. 1979 Clemson University, Entomology
Professional Experience
- East Carolina University
- Graduate Teaching Assistant 1971-1973
- East Carolina University School of Medicine, Greenville, NC
- Technician 1974
- Clemson University
- Graduate Assistant 1975-1979
- University of Arkansas, Fayetteville, Department of Entomology
- Research Associate 1979-1985
- University of Arkansas, Rice Research and Extension Center, Stuttgart
- Research Associate 1986-1995
- Project Leader 1988-present
- Senior Research Associate 1996-2002
- Research Assistant Professor 2003
Research Area
Research Areas Of Specialization:
- Primary area of research is biology, ecology, and management of rice insect pests. Primary pests are the rice stink bug and the rice water weevil. Current research is in testing insecticides for control of the rice water weevil, grape colaspis, and stalk borer in different production systems. In support of the rice breeding program rice lines are evaluated annually for susceptibility to discolored kernels, especially discolorations by rice stink bug damage. Also, research has begun into the ecology of the rice stalk borer and grape colaspis, and injury potential of aphids and armyworms on rice.
Goals and Research Focus:
- Biology and Management of Insect Pests of Rice (Project No. 1672) has a primary goal to provide rice growers with information on options for the management of rice insect pests. Research objectives include identifying cultural practices that may reduce yield losses by the rice water weevil and rice stalk borer, biological control agents of the rice stink bug, refining treatment thresholds for rice stink bug and rice water weevil, and sampling procedures for rice insect pests.
Publications
- Bernhardt, J. L. 1994. Pest Management: Rice water weevil infestation in water- and drill-seeded rice, pp 31-35. In B. R. Wells [ed.], Arkansas Rice Research Studies 1993. Ark. Agric. Exp. Stn. Res. Series 439. University of Arkansas, Fayetteville.
- Hix, R.L., D.T. Johnson, and J.L. Bernhardt. 2000. An aquatic barrier trap for monitoring adult rice water weevils (Coleoptera: Curculionidae). Fla. Entomol. 83:189-192.
- Hix, R.L., D.T. Johnson, and J.L. Bernhardt. 2000. Swimming behavior of an aquatic weevil, Lissorhoptrus oryzophilus (Coleoptera: Curculionidae). Fla. Entomol. 83:316-324.
- Hix, R.L., D.T. Johnson, and J.L. Bernhardt. 2001. Trapping adult Lissorhoptrus oryzophilus (Coleoptera: Curculionidae) with aquatic barrier traps.Environ. Entomol. 30:770-775.
- Hix, R.L., D.T. Johnson, and J.L. Bernhardt. 2003. Antennal sensory structures of Lissorhoptrus oryzophilus (Coleoptera: Curculionidae) with notes on aquatic adaptations. Coleopterists Bull. 57:85-94.
- Sudarsono, Hamim, J. L. Bernhardt and N.P. Tugwell. 1992. Survival of immature Telenomus podisi (Hymenoptera: Scelionidae) and rice stink bug (Hemiptera: Pentatomidae) embryos after field applications of
methyl parathion and carbaryl. J. Econ. Entomol. 85:375-378. - Bernhardt, J.L., K.A.K. Moldenhauer, and J.W. Gibbons. 2002. Screening lines for susceptibility to rice stink bug: Results from the Arkansas rice performance tests. Pp. 123-132. In, R.J. Norman and J.-F. Mullenet,
eds., B.R. Wells Rice Research Studies 2001. Ark. Agric. Exp. Stn. Res. Series 495. - Rashid, T., D.T. Johnson, and J.L. Bernhardt. 2002. Comparison of different sampling techniques for Oebalus pugnax (F.) in rice. Pp. 133-137. In, R.J. Norman and J.-F. Mullenet, eds., B.R. Wells Rice Research Studies 2001. Ark. Agric. Exp. Stn. Res. Series 495.