• Ph. D. in Agronomy, specializing in Weed Science, in 1997 from the University of Arkansas
• Bachelor’s degree in Agriculture, Soil Science major, in 1983 from the Visayas State College of Agriculture, Leyte, Philippines

• Started working for the University of Arkansas in September, 1998 as Assistant Professor in Weed Physiology\
• Granted a graduate assistantship at the Department of Agronomy, University of Arkansas, by Dr. Ron Talbert for both Master's and Doctorate degrees in Weed Science

• CSES 5023 - Weed Physiology and Herbicide Resistance in Plants ( PDF)

The study of reproduction and development of weeds and the ecological factors affecting these processes; biochemical and molecular mechanisms of differential tolerance to herbicides; the biochemical and molecular mechanisms of herbicide resistance in plants; flow of herbicide-resistance genes; application of biotechnology for the development of herbicide-resistant crops; and application of molecular biology techniques for weed science research.



• CSES 4143 - Principles of Weed Control

Advanced concepts and technology used in modern weed control practices and the study of chemistry, specific activity, and mode of action of herbicides in plants.

• Herbicide-resistant ryegrass in the southern U.S.
  • Analysis of genetic relationships between ryegrass (Lolium spp.) biotypes and the spread of diclofop-resistant ryegrass
  • Cross-resistance and multiple resistance patterns of diclofop-resistant ryegrass
    • Diclofop-resistant ryegrass
  • Mechanisms of herbicide resistance
  • Confirmation of resistance to diclofop or other herbicides as service for wheat producers
    

• Weedy Rice (red rice, Oryza sativa L.)
  • Morphological and genetic diversity of red rice populations in Arkansas
    • Blackhull red rice
    • Strawhull red rice
    • Weedy rice in Costa Rica
      
  • Comparative physiology between red rice and rice
  • Gene flow between herbicide-resistant (Clearfield) rice and red rice
    • Picture of F1 hybrid with CL rice
      
  • Flowering patterns of cultivated rice and red rice biotypes
  • Background tolerance of red rice to herbicides
  • Alternative herbicides and cultural practices for red rice management
  • Longevity of red rice seed

• Barnyardgrass (Echinochloa crus-galli)
  • Confirmation of resistance to propanil or quinclorac as service for rice growers
    

• Cowpea (Vigna unguiculata)
  • Natural tolerance to herbicides registered in field crops (soybean, corn, rice, etc.) to obtain new clearances for additional herbicides in cowpea production
    • Picture
      

• Spinach (Spinacea oleracea)
  • Screening for possible herbicides in spinach
    • Picture
      

• Herbicides for minor use crops other than cowpea and spinach, including southern greens (collard, kale, mustard, turnip greens); snapbeans; tomato; cucurbits; sweet potato; and sweet sorghum.  This is under the auspices of the IR-4 program.

Committees

• Student recruitment, CSES
• Outstanding Alumni, CSES
• Radiation Safety, University of Arkansas
• Herbicide resistance committee, SWSS
• Program Committee, SWSS
• International affairs, WSSA
• Publications Board, WSSA
• Associate Editor, WSSA

Selected Recent Publications
#  Shivrain, V. K., N. R. Burgos, D. R. Gealy, K. L. Smith, R. C. Scott, A. Mauromoustakos, and H. Black.  2009.  Red rice (Oryza sativa L.) emergence characteristics and influence on rice (O. sativa L.) yield at different planting dates. Weed Sci. 57:94-102.
# Shivrain, V.K., N.R. Burgos, M.A. Sales, A. Mauromoustakos, D.R. Gealy, K.L. Smith, H.L. Black, M. Jia. 2009. Factors affecting the outcrossing rate between ClearfieldTM rice and red rice (Oryza sativa). Weed Sci. 57:394-403.
# Shivrain, V.K., N.R. Burgos, D.R. Gealy, M.A. Sales, and K.L. Smith. 2009. Gene flow from weedy rice (Oryza sativa L.) to cultivated rice and fitness of hybrids. Pest Manag. Sci. DOI 10.1002/ps.1802
#  Lamego, F.A., D. Charlson, C.A. Delatorre, N.R. Burgos, R.A. Vidal. 2009. Molecular basis of resistance to ALS-inhibitor herbicides in Bidens subalternans. Weed Sci. 57: (In print).#  Shivrain, V.K., N.R. Burgos, M.A. Sales, and Y.I. Kuk. 2009.  Polymorphisms in the ALS gene of weedy rice accessions with different tolerance to imazethapyr. Crop Prot. (Accepted).
#  Shivrain, V. K., N. R. Burgos, D. R. Gealy, K. A. K. Moldenhauer, and C. J. Baquireza. 2008. Maximum outcrossing rate and genetic compatibility between red rice (Oryza sativa) biotypes and ClearfieldTM rice. Weed Sci.  56:807-813.
#  Kuk, Y. I., N. R. Burgos, and V. K. Shivrain.  2008.  Natural tolerance to imazethapyr in red rice.  Weed Sci. 56:1-11.
#  Zhang, J., N.R. Burgos, M, Kun, Y.J. Zhou, R.M. Geng, L. Yu. 2008. Genetic diversity and relationship of weedy rice in Taizhou City, Jiangsu Province, China. Rice Sci. 15:395-302.
#  Burgos, N. R., J. K. Norsworthy, R. C. Scott, and K. L. Smith. 2008.  Red rice status after five years of ClearfieldTM rice technology in Arkansas. Weed Technol. 22:200-208.
#  Jung, H. I., Y. I. Kuk, K. Back, and N. R. Burgos. 2008. Resistance pattern and antioxidant enzyme profiles of protoporphyrinogen oxidase (PROTOX) inhibitor-resistant transgenic rice. Pestic. Biochem. Physiol. 91:53-65.
#  Sales, M. A., V. K. Shivrain, N. R. Burgos, and Y. I. Kuk. 2008. Amino acid substitutions in the acetolactate synthase gene of red rice confer resistance to imazethapyr herbicide. Weed Sci. 56:485-489.
#  Kuk, Y. I., N. R. Burgos, and R. C. Scott. 2008.  Resistance profile of diclofop-resistant Italian ryegrass to ACCase and ALS inhibiting herbicides in Arkansas, U.S.A. Weed Sci. 56:614-623.
#  Zhang, Z.B., N. R. Burgos, J. P. Zhang, and L. Q. Yu. 2007.  Biological control agent for rice weeds from protoplast fusion between Curvularia lunata and Helminthosporium gramineum.  Weed Sci. 55:599-605.
#  Shivrain, V. K., N. R. Burgos, M. M. Anders, S. N. Rajguru, J. Moore, and M. A. Sales.  2007.  Gene flow between Clearfield rice and red rice. Crop Prot. 26:349-356.
#  Kuk, Y. I. and N. R. Burgos.  2007.  Cross-resistance profile of mesosulfuron-methyl-resistant Italian ryegrass in southern United States.  Pest Manag. Sci. 63:349-357.
#  Talbert, R. E. and N. R. Burgos.  2007.  History and management of herbicide-resistant barnyardgrass (Echinochloa crus-galli) in Arkansas rice.  Weed Technol. 21:324-331.
#  Burgos, N. R., L. P. Brandenberger, E. N. Stiers, V. K. Shivrain, D. R. Motes, L. Wells, S. Eaton, L. W. Martin, and T. E. Morelock.  2007.  Tolerance of selected advanced cowpea (Vigna unguiculata L.) breeding lines to fomesafen.  Weed Technol. 21: 863-868.
#  Norsworthy, J. K., N. R. Burgos, R. C. Scott, and K. L. Smith. 2007. Consultant perspectives on weed management needs in Arkansas rice. Weed Technol. 21:832-839.
#  Norsworthy, J. K., N. R. Burgos, and L. R. Oliver.  2007.  Student perspectives on the southern weed contest.  Weed Technol. 21:1093-1100.
#  Burgos, N. R., R. J. Norman, D. R. Gealy, and H. R. Black.  2006.  Competitive N uptake between rice and weedy rice.  Field Crops Res. 99:96-105.
#  Counce, P. A. and N. R. Burgos.  2006.  Agronomic practices in addition to herbicides for improving weed control in dry-seeded flooded rice.  J. Sustainable Agric. 28(3): 145-156.
#  Shin, J. S., H. I. Jung, J. A. Guh, T. E. Hwang, K. S. Min, Y. I. Kuk, S. Jung, and N. R. Burgos.  2006.  Mechanism of paraquat tolerance in cucumber leaves of various ages.  Weed Sci. 54:6-15.
#  Shivrain, V. K., N. R. Burgos1, K. A. K. Moldenhauer, R. W. McNew, and T. L. Baldwin.  2006.  Characterization of spontaneous crosses between Clearfield rice (Oryza sativa) and red rice (O. sativa).  Weed Technol. 20:576-584.
#  Stephenson, D. O. IV, L. R. Oliver, N. R. Burgos, and E. E. Gbur, Jr. 2006.  Identification and characterization of pitted morningglory (Ipomoea lacunosa) ecotypes.  Weed Sci. 54:78-86.#  Rajguru, S. N., N. R. Burgos, V. K Shivrain, J.McD. Stewart.  2005.  Mutations in red rice ALS gene associated with resistance to imazethapyr.  Weed Sci. 53:567-577.
#  Norsworthy, J. K., L. Brandenberger, N. R. Burgos, and M. Riley. 2005.  Weed suppression in Vigna unguiculata with a spring-seeded brassicaceae green manure.  Crop Prot. 24:441-447.
• Burgos, N. R., R. E. Talbert, K. S. Kim, and Y. I. Kuk. 2004.  Seedling growth inhibition and root ultrastructure of cucumber seedlings exposed to allelochemicals from rye.  J of Chem. Ecol. 30:671-689.
• Kuk, Y.I., K. H. Kim, O. D. Kwon, D. J. Lee, N. R. Burgos, S. Jung, and J. O. Guh.  2004.  Cross-resistance pattern and alternative herbicides for Cyperus difformis resistant to sulfonylurea herbicides in Korea.  Pest Manag. Sci. 60:85-94.
• Kuk, Y.I., H. I. Jung, O. D. Kwon, D. J. Lee, N. R. Burgos, and J. O. Guh. 2003.  Rapid diagnosis of resistance to sulfonylurea herbicides in Monochoria vaginalis Presl.  Weed Sci.  51:305-311.
• Kuk, Y.I., J. H. Lee, H. Y. Kim, S. J. Chung, G. C. Chung, J. O. Guh, H. J. Lee, and N. R. Burgos. 2003.  Relationships of cold acclimation and antioxidative enzymes with chilling tolerance in cucumber (Cucumis sativus L.).  Amer. Soc. Hort. Sci. 128:661-666.
• Kuk, Y. I., H. I. Jung, O. D. Kwon, D. J. Lee, N. R. Burgos, and J. O Guh.  2003.  Sulfonylurea herbicide-resistant Monochoria vaginalis in Korean rice culture.  Pest Manag. Sci. 59:949-961.
• Kuk, Y. I., J. S. Shin, N. R. Burgos, T. E. Hwang, O. S. Han, B. H. Cho, S. Jung, and J. O. Guh.  2003.  Antioxidative enzymes offer protection from chilling damage in rice plants.  Crop Sci. 43:2109.
• Kuk, Y. I., K. H. Kim, O. D. Kwon, D. J. Lee, S. Jung, N. R. Burgos, and J. O. Guh. 2003.  Cross-resistance pattern and alternative herbicides for Cyperus difformis resistant to sulfonylurea herbicides in Korea.  Pest Manag. Sci. 60:85-94.
• Kuk, Y. I., H. I. Jung, O. D. Kwon, N. R. Burgos, and J. O. Guh. 2002.  Cross-resistance pattern and alternative herbicides for Rotala indica resistant to imazosulfuron in Korea.  Pest. Biochem. and Physiol.  74:129-138.
• Burgos, N. R., Y. I. Kuk, and R. E. Talbert. 2001.  Amaranthus palmeri resistance and differential tolerance of A. palmeri and Amaranthus hybridus to ALS-inhibitor herbicides. Pest Mgt. Sci. 57:449-457.
• Kuk, Y. I., N. R. Burgos1, and R. E. Talbert. 2001.  Evaluation of rice by-products for nonchemical weed control. Weed Sci. 49:141-147.
• Norsworthy, J. K., N. R. Burgos1, and L. R. Oliver.  2001.  Differences in weed tolerance to glyphosate involved different mechanisms.  Weed Tehnol. 15:725-731.
• Burgos, N. R. and R. E. Talbert. 2000.  Differential activity of allelochemicals from Secale cereale in seedling bioassays.  Weed Sci. 48:302-310.
• Kuk, Y. I., N. R. Burgos1, and R. E. Talbert. 2000.  Cross- and multiple-resistance of diclofop-resistant ryegrass (Lolium spp.).  Weed Sci. 48:412-41.
• Burgos, N. R., R. E. Talbert, and J. D. Mattice. 1999. Cultivar and age differences in the production of allelochemicals by Secale cereale. Weed Sci. 47:481-485.
• Burgos, N. R. and R. E. Talbert. 1996. Weed control and sweet corn (Zea mays var. rogusa) response in a no-till system with cover crops. Weed Sci. 44:355-361.
• Burgos, N.R. and R. E. Talbert. 1996. Weed control by spring cover crops and imazethapyr in no-till southern pea (Vigna unguiculata). Weed Technol. 10:893-899.
Non-refereed publications: 19 Oral research paper presentations: 69

Background: Born to Mr. Virgilio Pila Roma and Mrs. Dalia Oplimo Roma. Grew up in the mountains of Boljoon, Cebu, Philippines in a farming community where the average farm size is 2 ha. Finished elementary education from Lunop, Elementary School and secondary education from Boljoon Barangay High School.

Married to Redentor Burgos, also from Cebu, Philippines.  Blessed with one son, Ronelo Burgos.