LSU AgCenter
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Name: Patrick Colyer
Title: Regional Director
Department: Northwest Region
Organization: LSU AgCenter
Address 1: 262 Research Station Drive
Address 2: Bossier City, LA 71112
Phone Number: (318) 741-7430
Fax Number: (318) 741-7433

  • B.S. Biology , 1978, Edinboro State College, Edinboro, Pennsylvania
  • Ph.D. Plant Pathology , 1983, University of Massachusetts, Amherst, MA

Areas of Specialization/Research

Project number: LAB03536

Title: Etiology and control of important cotton diseases in Louisiana.


  • Evaluate fungicides and other management practices for seedling diseases of cotton in Louisiana cotton.
  • Develop management strategies for Fusarium wilt, root-knot nematode, and the Fusarium wilt/root-knot nematode complex and determine their individual and collective effect on cotton productivity.
  • Monitor the progress of new and emerging disease problems.
Pankey, J. H., J.L. Griffin, P.D. Colyer, R. W. Schneider, and D. K. Miller. 2005. Preemergence herbicide and glyphosate effects on seedling diseases in glyphosate-tolerant cotton. Weed Technology 19:52-58.

Padgett, G.B., P.D. Colyer, and H.K. Whitam. 2004. Bronze wilt in
Louisiana cotton. Louisiana Agriculture 47(3):24-25.

Colyer, P. D. and P. R. Vernon. 2003. Efficacy of PCNB for the management of southern blight in fresh market tomatoes.
Louisiana Agriculture 46(1):23.

Padgett, G.B., P. D. Colyer, E. Burris, and K. Whitam. 2002. Hopper box applied fungicides for the management of cotton seedling disease.
Louisiana Agriculture 45(1):10-11.

Colyer, P. D., B. Padgett, W. D. Caldwell, and P. R. Vernon. 2002. Cotton Yields unaffected by boll dangle.
Louisiana Agriculture 45(3):12-13.

Colyer, P. D. 2001. Seedling Diseases Caused by Fusarium Species. pages 18-19 In: Compendium of Cotton Diseases, T.L. Kirkpatrick and C.S. Rothrock, eds. American Phytopathological Society,
St. Paul, MN.

Colyer, P. D. 2001. Fusarium Wilt. Pages 27-28 In: Compendium of Cotton Diseases, T.L. Kirkpatrick and C.S. Rothrock, eds. American Phytopathological Society,
St. Paul, MN.

Colyer, P. D., T. L. Kirkpatrick, W. D. Caldwell, and P. R. Vernon. 2000. Root-knot nematode reproduction and root galling severity on related conventional and transgenic cotton cultivars. J. Cotton Sci. 4:232-236.

Colyer, P. D., T. L. Kirkpatrick, P. R. Vernon, J. D. Barham, and R. J. Bateman. 1998. Reducing Meloidogyne incognita injury to cucumber in a tomato-cucumber double-cropping system. J. Nematology 30(2):226-231.

Mascagni, H. J., Jr., S. A. Harrison, J. S. Russin, P. D. Colyer, R. J. Habetz, W. B. Hallmark, S. H. Moore, J. L. Rabb, and D. J. Boquet. 1997. Nitrogen and fungicide effects on winter wheat produced in the gulf coast region. J. Plant Nutrition 20(10):1375-1390.

Colyer, P.D., T. L. Kirkpatrick, W. D. Caldwell, and P. R. Vernon. 1997. Influence of nematicide application on the severity of the root-knot nematode-Fusarium wilt disease complex in cotton. Plant Disease 81:66-70.

Wrona, A. F., B. Batson, D. Blasingame, P. Colyer, J. DeVay, R. H. Garber, C. Rothrock, D. Sumner, and T. Wheeler. 1996. Combating seedling disease - a beltwide challenge. Cotton Physiology Today 7:5-8.

Hanna, Y., P. D. Colyer, T. L. Kirkpatrick, D. J. Romaine, and P. R. Vernon. 1996. An economical, environment-friendly approach to reducing nematode damage to cucumbers in infested soil.
Louisiana Agriculture 39(2):20-21.

Micinski, S., T.L. Kirkpatrick, and P.D. Colyer. 1995. An improved plant washing procedure for monitoring early season insect pests in cotton.
Southwestern Entomol. 20:17-24.
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