James Ottea

 

 

Professor, Interim Department Head

 

 Insecticide Toxicology

 

EMAIL: jottea@agcenter.lsu.edu

 

DEGREES: B.S. 1979 Texas A&M University

                  M.S. 1980 Texas A&M University

                  Ph.D. 1987 University of California-Davis

 

 

 

 

 

 

 

Current Research Interests

 

The primary goals of my research are to explore biochemical, physiological and genetic mechanisms associated with resistance to insecticides. Pharmacokinetic and electrophysiological assays are employed to determine the expression and stability of metabolic and target site resistance in populations of pest insects. The genetic regulation of enzymes responsible for detoxification of insecticides is being studied to facilitate development and use of insecticides that retain their activity against populations of insects in which metabolic cross-resistance has arisen.

 

Also being investigated are interrelationships between life history traits (e.g. migration and host-plant feeding) and insecticide resistance. Information obtained from these studies provides a greater understanding of how expression of insecticide resistance alters insect biology, and may allow synthesis and deployment of chemicals with "anti-resistant" properties to be realized.

 

 

Recent Publications

 

Lanka S. K., Ottea J. A., Beuzelin J. M., and Stout M. J. (2013). Effects of chlorantraniliprole and thiamethoxam rice seed treatments on egg numbers and first instar survival of Lissorhoptrus oryzophilus (Coleoptera: Curculionidae). J Econ. Entomol. 106:181-8.

 

Yang, Y., Zhu, Y. C., Ottea, J., Husseneder, C., Leonard, B. R., Abel, C., Luttrell, R., and Huang, F. (2013). Characterization and transcriptional analyses of cDNAs encoding three trypsin- and chymotrypsin- like proteinases in Cry 1Ab-susceptible and Cry1Ab-resistant strains of sugarcane borer, Diatraea saccharalis. Insect Sci. 20: 485-96.

 

Jones, O. and Ottea, J.A. (2013). The effects of spinosad on Culex quinquefasciatus and three nontarget insect species. J. Am. Mosquito Control Assoc. 29: 346- 51.

 

Lanka, S.K., Stout, M.J., Beuzelin, J.M., and Ottea J. A. (2014) Activity of chlorantraniliprole and thiamethoxam seed treatments on life stages of the rice water weevil as affected by the distribution of insecticides in rice plants. Pest Manag. Sci. 70: 338-44.

 

Rinkevich, F. D., Margotta, J. W., Pittman, J. M., Danka, R. G., Tarver, M. R., Ottea, J. A., and Healy, K. B. (2015). Genetics, synergists, and age affect insecticide sensitivity of the honey bee, Apis mellifera. PLoS ONE 10: e0139841. Doi: 10.1371/journal.pone.0139841.

 

Rinkevich, F. D., Margotta, J. W., Pittman, J. M., Ottea, J. A., and Healy, K. B. (2016). Pteridine levels and head weights are correlated with age and colony task in the honey bee, Apis mellifera. Peer J. 4:e2155.

 

Rinkevich, F., Margotta, J., Pokhrel, V., Walker, T., Vaeth, R., Hoffman, W., Ottea, J. and  Healy, K. (2017). Limited impacts of truck-based ultra-low-volume applications of mosquito adulticides on mortality in honey bees (Apis mellifera). Bull. Entomol. Res., 107(6), 724-733.

 

Pokhrel V, DeLisi NA, Danka RG, Walker TW, Ottea JA, and Healy KB. (2018) Effects of truck-mounted, ultra low volume mosquito adulticides on honey bees (Apis mellifera) in a suburban field setting. PLoS One. 13(3):e0193535. doi: 10.1371/journal.pone.0193535.

 

Soderlund, D.M. and Ottea J. A. (2018). Preface to the special issue: Advances in insecticide mode of action, chemistry and resistance, Pestic. Biochem. Physiol.,

151, 1-2,