University of Guam, Western Pacific Tropical Research Center - Research for Guam's Future
 Home | Research | Contact Us |  News | GADTC | Publications |    Search:


cheap ghd


Robert L. Schlub

Research & Extension


PhD Michigan State University
Major Plant Pathology

MS Ohio State University
​Major Plant Pathology

BS Ohio State University
​Major Plant Pathology

Current and Past Endeavors

Research Interests


Contact Information:

Telephone: 671-735-2089
Cell Phone:
Fax: 671-734-1244
Contact Robert L. Schlub via email

Robert L. Schlub is currently involved in the following Fields of Study:

Publications by Robert L. Schlub:


Dixon, L. J. R. L. Schlub, K. L. Pernezny, and L. E. Datnoff. 2009.Host Specialization and Phylogenetic Diversity of Corynespora cassiicola. Phytopthology 99:1015-1027.

Schlub, R. L. and Grelen,L.B. 1983. Influence of hot water and areated steam treatments on sugarcane germination. The Sugar Journal 46:4-5.

Schlub, R.L., Grenlen, L.B. and Kamso-Pratt, J.M. 1985. Influence of soil moisture on germination of Ustilao scitaminea chlamydospores. Indian J. Agr. Sci. 55:110-114.

Schlub, R.L., and Johnson, S.A. 1982. Control of Phytophthora on pepper using captafol and methalaxy. The Philippine Agriculturist 65:215-219.

Schlub, R.L., and Lockwood, J.L. 1981. Etiology and epidemiology of Pythium ultimum seedling rot of soybean. Phytopathology 71:134-138

Schlub, R.L., and Lockwood, J.L, and Komada, H. 1981. Colonization of soybean seeds and plant tissue by Fusarium species in soil. Phytopathology 71:693-696.

Schlub, R.L., and Main, J.W. 1979. Portable recorder for the Continuous monitoring of soil moisture resistance blocks. J Agr. Engng. Res. 24-319-323.

Schlub, R.L., and Schmitthenner, A.F. 1977. Disinfecting soybean seed by fumigation. Plant Dis. Rep. 61:470-473.

Schlub, R.L., and Schmitthenner, A.F. 1978. Effects of soybean seed coat crack on seed exudation and seedling quality in soil infested with Pythium ultimum. Phytopathology 68:1186-119.

Abstracts and Posters

SCHLUB, R., Schlub, K., Brown, R., and Cannon, P.G. 2014. Early results of Casuarina equisetifolia provenance trial in Guam and advances in research on its decline. 2014 APS annual meeting Minneapolis, Minnesota, Phytopathology 104: 207-P.

Ayin, C.M., Schlub, R.L., and Alvarez, A.M. 2013. Identification of bacteria associated with decline of ironwood trees (Casuarina equisetifolia) in Guam. Poster in proceedings of 2013 APS annual meeting Austin, Texas, Phytopathology 103:P422.

Marutani, M., J. Tuquero, R. Schlub and J. McConnell. 2005. Response of vegetable crops to mycorrhizal inoculation in a calcareous soil in the tropics. HortScience 40:1000. 

McConnell, J. Marutani, M., R. Schlub, L. Raulerson, L. Gutierrez and G. Perez.2005. Production of the print-on-demand publication “Weeds of Guam.” HortScience40:1028.  

Mersha, Z., Schlub, R.L. and Moore, A. 2009. The state of ironwood (Casuarina equisetifolia subsp. equisetifolia) decline on the Pacific island of Guam. Phytopathology 99:S85

Mersha, Z., Aime, M. C., Cannon, P., Nandwani, D., Nelson, S., Spaine, P.C., and Schlub, R.L. 2011. Decline of Casuarina equisetifolia (ironwood) trees on Guam: Ganoderma and Phellinus. Phytopathology 101:S216.

Schlub, R.L. 2002. Occurrences and severity of diseases of eggplant, pepper, and tomato on Guam. Phytopath. Vol: 92-6, S73.

Mersha, Z., Schlub, R. L., Spaine, P.O., Smith J.A., and Nelson, S.C. 2010. Visual and quantitative characterization of ironwood tree (Casuarina equisetifolia) decline on Guam. Poster in proceedings of 2010 APS annual meeting Charlotte, North Carolina:  Phytopathology 100:S82.

Mersha, Z., Schlub, R.L., Spaine, P., Smith, J., Nelson, S., Moore, A.,  McConnell, J., Pinyopusarerk, K., Nandwani, D., and Badilles, A., 2010. Fungal Associations and Factors in Casuarina equisetifolia decline. Poster in proceedings of 9th International Mycological Congress Edinburgh, UK:  IMC9: P3.268.

Smith, L. J., Schlub,R.L. , and Datnoff, L.E. 2007. Diagnostic features of Corynespora cassiicola and its associated diseases.  National Plant Diagnostic Network Meetings, Jan 28-31.

Schlub, R.L. 2003. The need for diagnostic keys in production guides. 4th National Integrated Pest management Symposium. (Abstract).

Schlub, R.L., Bamba, J., Brown, R.W. 2011. Investigating a tomato virus on Guam. Proc. 7th International IPM Symposium, Memphis TN.

Schlub, R.L., Kubota, R., and Alvarez, A.M. 2013. Casuarina equisetifolia decline in Guam linked to colonization of woody tissues by bacteria. Poster in proceedings of 2013 APS annual meeting Austin, Texas, Phytopathology 103: P423.

Schlub, R.L., Mendi, R. C., Aiseam, C.C., Mendi, R. C. Davis, J.K. and Aime, M.C. 2012. Survey of wood decay fungi or Casuarina equisetifolia (ironwood) on the islands of Guam and Saipan (abstract). Phytopathology 102:P416.

Schlub, R.L., Moore, A., Marx, B., Schlub, K., Kennaway, L., Quintanilla, M., Putnam, M., Mersha, Z., 2011. Decline of Casuarina equisetifolia (ironwood) trees on Guam: Symptomatology and explanatory variables. Phytopathology 101:S216.

Schlub, R., Schlub, K., Brown, R., and Cannon, P.G. 2014: Early results of Casuarina equisetifolia provenance trial in Guam and advances in research on its decline: 270-P

Smith, L.J. and Schlub, R.L. 2005. Foliar fungi on weeds of Guam and the potential for Corynespora cassiicola as a bioherbicide for Stachytarpheta jamaicensis. Phytopathology 95:S93.

Smith, L.J. and  Schlub, R.L. 2004. Host range of Corynespora cassiicola and its occurrence on weeds, ornamentals and crops of Guam. Phytopathology 94:S97.


Schlub, R.L., Mersha, Z., Aime, C.M., Badilles, A., Cannon, P.G., Marx, P.G. , McConnell, J., Moore, A., Nandwani, D., Nelson,S.C., Pinyopusarerk, K., Schlub, K.A., Smith, J.A., and Spaine, P.O. 2011. Guam Ironwood (Casuarina equisetifolia) Tree Decline Conference and Follow-up. In:  Zhong, C., Pinyopusarerk, K., Kalinganire, A., Franche, C. (eds), Proceedings of the 4th International Casuarina Workshop, Haikou, China 21-25 March 2010, pp239-246.

Schlub, R.L., Smith L.J., Datnoff, L.E. and Pernezny, K. 2009. An overview of target spot of tomato caused by Corynespora cassiicola. Acta Hort. (ISHS) 808:25-28.

Schlub, R.L., Schlub, K.A., Alvarez, A.M., Aime, M.C., Cannon, P.G., and Persad, A. 2012. Integrated Perspective on Tree Decline of Ironwood (Casuarina equisetifolia) on Guam. In: Brown, J., Comp. 2013 Proceedings of the 60th Annual Western International Forest Disease Work Conference; 2012 October 8-12, Lake Tahoe, CA. pp. 51-60.

Smith, L.J. Datnoff, L.E. Pernezny, K. and Schlub, R.L. 2009. Phylogenetic and pathogenic characterization of Corynespora cassiicola. Acta Hort. (ISHS) 808:51-56.

L. J. Smith, L. Datnoff, K. Pernezny, P. Roberts, J. Rollins, R. L. Schlub, J. Scott 2005. Characterization, host-range, and resistance of tomato cultivars to the tomato target spot fungus, Corynespora cassiicola. Florida Tomato Institute Proceedings.

Smith L. J., Datnoff L. E., Pernezny K. L., Rollins J. A., Schlub R. L. 2008. Phylogenetic analyses of diverse Corynespora cassiicola isolates indicate an evolutionary correlation with host not geography, 9th European Conference on Fungal Genetics, April 5-8, Meeting Abstracts, Edinburgh, Scotland. p. 238.


Pernezny, K.L., Blazquez, C.H. Smith L.J., and Schlub R.L. 2014. Target Spot. pp. 44-46. In Compendium of Tomato Diseases and Pests Second edition (Jones, J.B, Zitter, T.A., Momol, T.M. and Miller, S.A. Eds.) APS Press Minnesota, USA.

Schlub, R.L. Ed. 2013 Gago, Guam Ironwood Tree, Casuarina equisetifolia: Past, Present, Future (R.L. Schlub Ed.). Guam Cooperative Extension Service Publication. 29p.

Schlub, R.L. 2011. Soil Fertility and Nutrient Management for Guam and the Northern Mariana Islands. Guam Cooperative Extension Service Publication. 60p.

Schlub, R.L. and Yudin, L. 2002, ed. Eggplant, pepper, and tomato production guide for Guam. Guam Cooperative Extension. Guam Cooperative Extension book

Marutaini, M., Schlub, R.L. 2002. Cultivar evaluation of vegetable soybeans on Guam. Micronesica Supplement 7:93-100.

Yudin, L. and Schlub, R.L. and 1998, Guam Cucurbit Guide, Guam Cooperative Extension book.

NewsSpecies GADTCPublicationsField StationsGarden Tool Hire