Peter Landschoot, Ph.D.

Responsibilities and Interests:

Dr. Landschoot’s primary responsibility is to serve as the resident extension turfgrass management specialist in Pennsylvania. This assignment involves organizing and implementing extension education programs and is accomplished through organizing large regional conferences; development of extension publications, slide sets, videos, and computer programs; contribution to newsletters and trade magazines; and participation in media events. Dr. Landschoot provides current management information to clientele through presentations at meetings, seminars, workshops, and field demonstrations. His research program focuses on integrated pest management with emphasis in disease management, use of composts as soil amendments in turf, turfgrass variety evaluation, and soil fertility.

Courses Taught

• TURF 436W - Case Studies in Turfgrass Management
• TURF 956A - Case Studies in Golf Turf Management
• TURF 490 - Colloquium

Professional Background:

• Assistant Golf Course Superintendent, The Country Club of Rochester, 1977–80.
• Assistant Prof. Turfgrass Science, The Pennsylvania State University, 1989–94.
• Associate Prof. Turfgrass Science, The Pennsylvania State University, 1994–2003.
• Professor Turfgrass Science, The Pennsylvania State University, 2003–present.
• Professional Societies: Crop Science Society of America, American Phytopathological Society, International Turfgrass Society, and American Society of Horticultural Science
• Editorial Service: Associate Editor Plant Disease (APS), Senior Editor (Plant Disease), and Co-editor International Turfgrass Research Journal (ITS), Associate Editor Applied Turfgrass Science

Selected Research Publications:

1. Liu, B. and P.J. Landschoot. 2018. Influence of phosphorus in starter fertilizer on tall fescue establishment. HortScience 53(12):1897-1906. 
2. Landschoot, P.J. 2018. Control of wirestem muhly with herbicides in non-mowed fine fescue in Pennsylvania. Crops, Forage, and Turfgrass Management 4:180050 (1-3). doi:10.2134/cftm2018.07.0050.Landschoot, P.J., M.J. Carroll, J.M. Goatley, Jr., and T.R. Turner. 2017. Turfgrass nutrient management and regulatory issues in the Chesapeake Bay watershed. International Turfgrass Society Research Journal 13:1-11. doi:10.2134/itsrj2016.05.0419.
3. Landschoot, P.J. and B. Liu. 2016. Tolerance of perennial ryegrass (Lolium perenne) cultivars to simulated fall traffic. Acta Horticulturae 1122:91-96.
4. Landschoot, P.J. and M. Carroll. 2016. Tolerance of microclover to postemergence and preemergence herbicides. Crops, Forages, and Turfgrass Management 2:1-3. doi:10.2134/cftm2015.0226
5. Huang, Y., J. Kaminski, and P.J. Landschoot. 2015. Regulation with trinexapac-ethyl and dew removal at the time of fungicide application did not influence dollar spot control. HortScience 50:496-500.
6. Landschoot, P.J., A. Wolf, and J. Schwenk. 2014. Summary of Mehlich-3 P data from home lawn soil tests in Pennsylvania. Applied Turfgrass Science 11(1):1-2. https//www.agronomy.org/publications/ats/articles/11/1/ATS-2014-0048-BR
7. Raley, R., P.J. Landschoot, and J. Brosnan. 2013. Influence of phosphorus and nitrogen on annual bluegrass encroachment in a creeping bentgrass putting green. International Turfgrass Research Journal. 12:649-656.
8. Lyons, E.M., P.J. Landschoot, and D.R. Huff. 2011. Root distribution and tiller densities of creeping bentgrass cultivars and greens-type annual bluegrass cultivars in a putting green. HortScience 46:1411-1417.
9. Delvalle, T., P.J. Landschoot, and J.E. Kaminski. 2011. Effects of dew removal and mowing frequency on fungicide performance for dollar spot control. Plant Disease 95:1427-1432.
10. Cook, P.J., P.J. Landschoot, and M.J. Schlossberg. 2009. Inhibition of Pythium spp. and suppression of Pythium blight of turfgrasses with phosphonate fungicides. Plant Disease 93:809–814.
11. Aamlid, T.S., P.J. Landschoot, and D. Huff. 2009. Tolerance to simulated ice encasement and Microdochium nivale in USA selections of greens-type Poa annua. Acta Agriculturae Scandinavica, Section B – Soil & Plant Science 59(2):170–178.
12. Cook, P.J., P.J. Landschoot, and M.J. Schlossberg. 2009. Suppression of anthracnose basal rot symptoms and improved putting green quality with phosphonate fungicides. International Turfgrass Society Research Journal 11:181–194.
13. Schlossberg, M.J., F.C. Waltz, Jr., P.J. Landschoot, and B.S. Park. 2008. Recent mechanical cultivation of lawns enhances lime application efficacy. Agronomy Journal 100(3):855–861.
14. Aamlid, T. and P.J. Landschoot, 2007. Effect of spent mushroom substrate on seed germination of cool-season turfgrasses. HortScience 42:161–167.
15. Landschoot, P.J. and M. Mocioni. 2005. Lotta alle infestanti del tappeto erboso (Weed control in turfgrass). Informatore Fitopatologico La Difesa Della Piante 7(8):21–32.
16. Park, B.S. and P.J. Landschoot. 2005. Combinations of nonselective herbicides for the control of Kentucky bluegrass and tall fescue. International Turfgrass Society Research Journal 10:1198–1204.
17. McNitt, A.S. and P.J. Landschoot. 2005. The effects of soil reinforcing materials on the traction and divot resistance of a sand rootzone. International Turfgrass Society Research Journal 10:115–1123.
18. Landschoot, P.J., B.S. Park, A.S. McNitt, and M.A. Fidanza. 2004. Effect of dazomet on annual bluegrass emergence and creeping bentgrass establishment in putting green turf. HortScience 39:1478–1482.
19. McNitt, A.S., P.J. Landschoot, and D. Petrunak. 2004. Evaluation of the playing surface quality of an infilled synthetic turf system, Proceedings 1st International Conference Turfgrass Management and Science for Sports Fields. Athens, Greece. June 2–7. Acta Horticulturae ISHS No. 661. pp. 559–565.
20. McNitt, A.S., P.J. Landschoot and D.V. Waddington. 2004. Effects of turfgrass, cutting height, and soil conditions on traction. Proceedings 1st International Conference Turfgrass Management and Science for Sports Fields. Athens, Greece. June 2–7. Acta Horticulturae ISHS No. 661. pp. 39–49.
21. Titone, P., M. Mocioni, P.J. Landschoot, M.L. Gullino. 2004. Survey of ectotrophic root-infecting fungi associated with turfgrass patch diseases in Italy. Proceedings 1st International Conference Turfgrass Management and Science for Sports Fields. Athens, Greece. June 2–7. Acta Horticulture ISHS No. 661. pp. 491–499.
22. McNitt, A.S. and P.J. Landschoot. 2003. The effects of soil reinforcing materials on the surface hardness, soil bulk density, and water content of a sand root zone. Crop Science 43:957–966.
23. Park, B.S. and P.J. Landschoot. 2003. Effect of dazomet on annual bluegrass emergence in turf maintained as a golf course fairway. Crop Science 43:1387–1394.
24. Titone, P., P.J. Landschoot, and M.L. Gullino. 2002. Le malattie radicali dei tappeti erbosi: aspetti di biologia, epidemiologia e difesa. Informatore Fitopatologico La Difesa Della Piante 17(44):46-51.
25. Landschoot, P.J., B.S. Park, and W. Uddin. 2001. Nontarget effects of PCNB on putting green turf. International Turfgrass Society Research Journal 9:679–685.
26. McNitt, A.S. and P.J. Landschoot. 2001. The effects of soil-reinforcing inclusions in an athletic field root-zone. International Turfgrass Society Research Journal 9:565–573.
27. McNitt, A.S. and P.J. Landschoot. 2001. Evaluation of a modular turfgrass system amended with shredded carpet. International Turfgrass Society Research Journal 9:559–565.
28. Backman, P.A., P.J. Landschoot, and D.R. Huff. 1998. Variation in pathogenicity, morphology, and RAPD marker profiles in Colletotrichum graminicola from turfgrasses. Crop Science 39:1129–1135.
29. Landschoot, P.J., B.B. Clarke, and A.B. Gould. 1993. Ecology and epidemiology of ectotrophic root-infecting fungi causing patch diseases of turfgrasses. p. 73–105. In B.B. Clarke and A.B. Gould (eds.) Turfgrass Patch Diseases Caused by Ectotrophic Root-Infecting Fungi. American Phytopathological Society Press, St. Paul, MN.
30. Landschoot, P.J. 1993. Taxonomy and biology of ectotrophic root-infecting fungi associated with patch diseases of turfgrasses. p. 41–71. In B.B. Clarke and A.B. Gould (eds.) Turfgrass Patch Diseases Caused by Ectotrophic Root-Infecting Fungi. American Phytopathological Society Press, St. Paul, MN.
31. Landschoot, P.J., T.L. Watschke, and B.F. Hoyland. 1993. Influence of preemergence and postemergence herbicides on rooting of turfgrasses. Weed Technology 7:123–126.
32. Landschoot, P.J. 1992. Magnaporthe. p. 67–70. In L.L. Singleton, J. D. Mihail, and C.M. Rush (eds.) Methods for Research on Soilborne Phytopathogenic Fungi. American Phytopathological Society Press, St. Paul, MN.
33. Landschoot, P.J. and B.F. Hoyland. 1992. Gray leaf spot of perennial ryegrass turf in Pennsylvania. Plant Disease 76:1280–1282.
34. Landschoot, P. J. and N. Jackson. 1989. Pathogenicity of some fungi with Phialophora anamorphs that infect the roots of turfgrasses. Phytopathology 80:520–526.
35. Landschoot, P.J. and N. Jackson. 1989. Magnaporthe poae sp. nov., a hyphopodiate fungus with a Phialophora anamorph, from grass roots in the United States. Mycological Research 93:59–62.
36. Landschoot, P. J. and N. Jackson. 1989. Gaeumannomyces incrustans sp. nov., a root-infecting hyphopodiate fungus from grass roots in the United States. Mycological Research 93:55–58.
37. Landschoot, P.J. and D.V. Waddington. 1987. Response of turfgrass to various nitrogen sources. Soil Sci. Soc. Am. J. 51:225–230.

Selected Extension Publications:

Turfgrass growth, development, and identification:

Landschoot, P.J. The cool-season turfgrasses: Basic structures, growth and development. https://extension.psu.edu/the-cool-season-turfgrasses-basic-structures-growth-and-development

Landschoot, P.J. The cool-season turfgrasses: Identification.  https://extension.psu.edu/the-cool-season-turfgrasses-identification

Turfgrass species, seed mixtures, and cultivars:

Landschoot, P.J. Turfgrass species for Pennsylvania.  https://extension.psu.edu/turfgrass-species-for-pennsylvania

Harper, J. and P.J. Landschoot. Turfgrass seed and seed mixtures.  https://extension.psu.edu/turfgrass-seed-and-seed-mixtures

Landschoot, P.J. Evaluation of new bentgrasses for golf course fairways and tees.  https://extension.psu.edu/evaluation-of-new-bentgrasses-for-golf-course-fairways-and-tees

Landschoot, P.J. Evaluation of some new bentgrasses for putting greens. https://extension.psu.edu/evaluation-of-some-new-bentgrasses-for-putting-greens

Establishment and renovation:

Landschoot, P.J. Lawn establishment. https://extension.psu.edu/lawn-establishment

Landschoot, P.J. Renovation of lawns. https://extension.psu.edu/renovation-of-lawns

Weed management:

Landschoot, P.J. Control of summer annual grass weeds in turfgrass. https://extension.psu.edu/control-of-summer-annual-grass-weeds-in-turfgrasses 

Landschoot, P.J. Postemergence control of crabgrass and other summer annuals. https://extension.psu.edu/postemergence-control-of-crabgrass-and-other-summer-annual-grasses-in-lawns

Turfgrass fertilization:

Landschoot, P.J. 2018. Calibrating your fertilizer spreader. Extension Publication Code EE0242. 8 pp. https://extension.psu.edu/calibrating-your-fertilizer-spreader

Landschoot, P.J. 2017. Turfgrass fertilization: A basic guide for professional turfgrass managers. Extension Publication UC184. 21 pp. https://extension.psu.edu/turfgrass-fertilization-a-basic-guide-for-professional-turfgrass-managers

Winterkill:

Landschoot, P.J. Winterkill of turfgrasses. https://extension.psu.edu/winterkill-of-turfgrasses