Gary W. Lawrence
Associate Professor
Department of Entomology and Plant Pathology
Mississippi State University

PhD in Plant Pathology
Louisiana State University, 1984

Web: www.entomology.msstate.edu

Email: glawrence@entomology.msstate.edu
Phone: 662-325-2988

Research Interests
The Nematology Research program interests are related directly to the improvement of agricultural production systems which are affected with yield-reducing plant-parasitic nematodes using economical, environmentally and ecologically safe management techniques. To implement a successful research program a logical and systematic series of steps or research interest points must be followed and preformed. These points of interest are as follows:
  • The accurate identification of the nematode species that is affecting a specific crop
  • Determine the spatial distribution of the parasites in the field
  • Develop means to reduced nematode numbers to levels that are not injurious to a specific crop
  • Methods to monitor nematode population development during the growing season
  • Estimate yield loss estimates attributed to nematode infections.

Current Research Projects
Precision agriculture and nematode management in agriculture. Specific future project goals include:
  • Expansion of hyper spectral reflectance for in-field nematode estimations which is currently with the reniform nematode on cotton, to other nematode species specifically the root-knot nematode associated with cotton production
  • Field test the utility of hyper spectral reflectance across the cotton belt to provide data for the marketability of this new technique for nematode estimations
  • Adapt hyper spectral reflectance to soybean and corn production.
  • Determine the in-field distribution and population densities of plant-parasitic nematodes and correlate with specific soil texture zones effects on harvestable yields.
  • Evaluate an enclosed pressure driven variable rate liquid nematicide application system. The VR system will apply the nematicide to the specific sites in the field at the specific rates to manage the nematodes.
  • Determine the value of real time NDVI data collected from sensors like the Green Seeker and how this correlates to nematode population levels. This could provide a means to accurately deliver post plant application of nematicides.

Most Current Publications:
Lawrence, G. W.,, R .L. King, R. Doshi, K. S. Lawrence, C. Overstreet, S. H. Norwood, A. T. Winstead, J. Caceres and M. Wollcot. 2008. Combination of Hyper spectral Reflectance, Soil Electrical Conductivity and Real Time NDVI for Estimating In field Reniform Nematode Numbers. www.cotton.org/beltwide/proceedings.

Doshi, R. A., R. L. King, G. W. Lawrence. 2008. Self-Organized Maps-based Spectral Prediction of Rotylenchulus reniformis Population numbers. Geoscience and Remote Sensing Symposium, 2007. IGARSS 2007. IEEE International. 444-447.

Lawrence, G. W., R. L. King, R. Doshi, K. S. Lawrence, C. Overstreet, S. H. Norwood, A. T. Winstead, J. Caceres, M. Wollcot. 2008. Combination of Hyper spectral Reflectance, Soil Electrical Conductivity and Real Time NDVI for Estimating In field Reniform Nematode Numbers. Beltwide Cotton Conference, Nashville, Tennessee.

Lawrence, G. W., R. L. King, G. R. Ellis, R. Doshi, K. S. Lawrence, S. Samson, C. Caceres. 2007. Population estimation of the reniform nematode using hyperspectral reflectance data and applications to variable rate nematicide applications. Proceedings of the National BeltwideCotton Conference, National Cotton Council, Memphis TN. Vol. 1.

Doshi, R. A., R. L. King, G. W. Lawrence.. 2007. Wavelet-SOM in Feature Extraction of hyperspectral data for classification of nematode species. Geoscience and Remote Sensing Symposium, 2007. IGARSS 2007. IEEE International. 2818-2821.

Koti, S., K. R. Reddy, G. W. Lawrence, V. R. Reddy, V. G. Kakani, D. Zhao, W.Gao. 2007. Effect of Enhanced UV-B Radiation on Reniform Nematode (Rotylenchus reniformis Linford and Oliveira) Populations in Cotton (Gossypium hirsutum L.). Plant Pathology Journal. Vol. 6. 51-59.

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