B.S., Lebanon Valley College
M.S., University of Pittsburgh
Ph.D., State University of New York (SUNY)
BIOL 100 – General Biology
BIOL 161/461 – Microbiology
BIOL Environmental Science
BIOL 241 – Principles of Ecology
BIOL 345 – Applied Ecology
BIOL 247 – Biodiversity
BIOL 424 – Mycology
BIOL 546 – Plant Ecology
Areas of Specialization:
Microbiology, Mycology, Population Biology.
Plants growing with mycorrhizae, a mutually beneficial interaction of plant roots with specific soil fungi, are often more vigorous due to increased uptake of mineral nutrients, such as phosphorus. My students and I conducted greenhouse and field experiments designed to examine the importance of the mycorrhizae on agricultural productivity and the impact of environmental factors on the mycorrhizae. Lawns in America cover a land area the size of Virginia, yet relatively few ecologists have studied this manipulated ecosystem. So my students and I conducted experiments to examine the effects of lawn pesticides on
1994. Are crop and weed interaction effected my mycorrhizae? Journal of Pennsylvania Acad. of Sciences 67:175. Drenner, D. D., and D. H. Yocom.
1994. Effects of mycorrhizae on competition between soybeans and weeds. J. of Pennsylvania Acad. of Science 67:181. Hudoch, H. and D. H. Yocom.
1994. The fungi of Southcentral Pennsylvania: a first look. In At the Crossroads: A Natural History of Southcentral Pennsylvania (D. Zegers, editor)
1992. Dependence of three Nebraska Sandhills warm-season
1991. Effect of mycorrhizae and nutrient exchange on the growth of interacting corn and bean plants. Bull. Ecol. Soc. Amer. 72(2):297-298. (with D. Weaver)
1991. Effect of VA mycorrhizae on root /shoot ratios of onion. Mycol. Soc. of Amer. Newsletter 42(1):39. (with M. McElvaney)
1991. Mycorrhizal fungi increase yields of winter wheat. In: Keister, D. L. & P. B. Cregan (eds.)The Rhizosphere and Plant Growth.. Kluwer Acad. Pub., Netherlands. p 382. (with M.G. Boosalis)
1987. The effects of prolonged drought on the yield of mycorrhizal and nonmycorrhizal grain crops. In: Mycorrhizal in the Next Decade, Practical Applications and Research Priorities. p 41. (with Boosalis, Flessner, and Cunningham).