Sacco, Paul. (1939). The effect of certain indole compounds upon cuttage. Master's thesis.

Sacco, Paul. (1946). Mineral absorption and resistance to wildfire in tobacco. Doctoral thesis.

Sanogo, Soumaila. (1991). Spread and control of Pythium spp. in an ebb and flow subirrigation system. Master's thesis.

Sanogo, Soumaila. (1995). Epidemiology of tomato anthracnose caused by Colletotrichum coccodes (WallR.) Hughes. Doctoral thesis.

Sargent, Charles Sprague. (1961). Manual of the trees of North America (exclusive of Mexico). New York: Dover Publications.
Call number: QK481.S21 1961 v.1
Note: Hildebrandt Library owns only volume 1 of the two volume set.

Savage, James E. (1999). Plant bioindicator responses to ambient ozone exposures in the Commonwealth of Pennsylvania : Survey results from the 1998 Forest Health Monitoring Plots and Air Quality Monitoring Sites. Master's thesis.

Sayed, Mustafa Quasim. (1960). The effect of nutrition, pH and nematodes on damping-off disease of pea, tomato, and cucumber. Doctoral thesis.

Scalza, Janice Christine. (1979). The effect of Agrobacterium radiobacter var. radiobacter strain 84 and soil fumigation on the incidence of crown gall induced by strains of A. radiobacter var. tumefaciens in Pennsylvania. Master's thesis.

Scarborough, Betsy Ann. (1974). The effects of tobacco ringspot virus and tomato ringspot virus on growth and flowering quality of Pelargonium x hortorum Baile. Master's thesis.

Scheifele, Gordon LeRoy. (1969). Stabilizing selection in "Trichometasphaeria turcicca" ("Helminthosporium turcicum") on "Zea mays". Master's thesis.

Schisler, Lee Charles. (1952). An attempt to overcome the stunting effect of short-wave radiation with synthetic plant growth substances. Master's thesis.

Schisler, Lee Charles. (1957). A physiological investigation of sporophore initiation in the cultivated mushroom, Agaricus campestris L. ex Fr. Doctoral thesis.

Schmidt, Robert Allen. (1961). Branch canker and dieback of "quercus prinus" L. caused by a species of "botryodiplodia. Master's thesis.

Schmidt, Robert Allen. (1964). The microclimate of the habitat of Fomes annosus (Fr.) Karst. and the influence of several environmental factors on basidiospore release. Doctoral thesis.

Schroeder, Gary Morris. (1980). Effect of compost moisture, casing moisture, and supplementation on size and yield of commercial mushrooms. Master's thesis.

Schultz, Otto Ernst. (1962). Inter- and intra-race variation among mass and monozoospore isolates of "Phytophthora infestans" ( Mont. ) de Bary. Doctoral thesis.

Seem, Robert Charles. (1972). Evaluation of potential chemical protectants from ozone damage to Phaseolus vulgaris L. Master's thesis.

Seem, Robert Charles. (1976). Potato tuber maturity: analysis and prediction. Doctoral thesis.

Shain, Louis. (1960). The influence of soil moisture on absorption of solutions through cut stumps and development of oak wilt. Master's thesis.

Shaw, Charles Gardner. (1940). Microscopic characteristics of some wood-decay fungi. Master's thesis.

Shen, Qing. (2001). Molecular phylogenetic analysis of Grifola frondosa (maitake) and related species and the influence of slected nutrient supplements on mushroom yield. Doctoral thesis.

Shinde, Pandurang Abaji. (1972). Studies on role of bacteria in root-rot and wilt of alfalfa. Doctoral thesis.

Shriner, Carole R. (1972). Resin constituents of Pinus strobus and their effects on the growth of selected wood-inhabiting fungi in vitro. Master's thesis.

Shriner, David S. (1969). Comparative effects of hydrogen chloride gas on tomato and chrysanthemum: I. Distribution and accumulation of choride following exposure. II. Pathological anatomy of hydrogen choride gas injury. Master's thesis.

Shrum, Robert D. (1969). The influence of environment on basidiospore release by "Fomes rimosus" (Berk.) Dooke. Master's thesis.

Shrum, Robert D. (1975). EPIDEMIC: a flexible plant disease simulator. Doctoral thesis.

Shuman, Joel Lee. (1995). Integrating a host resistance factor into a potato early blight forecasting model. Master's thesis.

Siegler, Eugene Alfred. (1918). The histological relations of several rot fungi to the tissues of the apple fruit. Master's thesis.

Sigulas, Kristen M. (1986). Genetic studies of polygenic resistance to Helminthosporium turcicum race 2 in corn. Master's thesis.

Sim, Susan Hope Tweedie. (1983). Locating sources of resistance to bean yellow mosaic virus in red clover (Trifolium pratense L.). Master's thesis.

Skelly, John Moore. (1964). The nature and occurrence of an annual canker of "acer saccharum", Marsh. in Pennsylvania. Master's thesis.

Skelly, John Moore. (1968). Root inhabiting insects as possible vectors of "Ceratocystis fagacearum" (Bretz) Hunt. Doctoral thesis.

Sluzalis, Lawrence Leonard. (1933). Cultural characteristics of some wood-destroying fungi. Master's thesis.

Small, Daniel Llewellyn. (1983). Penetration and colonization of tomatoes by Fusarium oxysporum f. sp. radicis-lycopersici and Fusarium oxysporum f. sp. lycopersici. Master's thesis.

Smeenk, Peter Jeffery. (1992). Interaction between Heterodera trifolii, Fusarium avenaceum and Fusarium acuminatum on Red Clover. Master's thesis.

Smith, Donald Harvey. (1962). Light effects on growth and reproduction of "Botryosphaeria ribis" Gross. und Dug. Master's thesis.

Smith, Donald Harvey. (1966). A study of certain aspects of the black knot disease of plum and its causal agent, dibotryon morbosum (Schw.) Theiss. and Syd. Doctoral thesis.

Smith, Harry Jay. (1976). Influence of SO2 on conifers with emphasis on morphology and histology of scotch pine. Master's thesis.

Sommerfeld, Mark L. (1988). The effects of barley yellow dwarf virus and Helminthosporium avenea infections, singly and in combination, on yield components of oats. Master's thesis.

Soulen, David Michael. (1972). Root chip inoculation, an indexing method for prunus stem pitting. Master's thesis.

Spadafora, Vincent James. (1986). Epidemiology and control of septoria nodorum leaf and glume blotch on soft red winter wheat in Pennsylvania. Doctoral thesis.

Spear, Mark. (1983). Protoplast production, purification, and regeneration in Agaricus brunnescens. Master's thesis.

Speroni, Joseph James. (1979). The influence of ozone on glycoalkaloid levels in potato tubers and foliage. Master's thesis.

Spotts, Robert Allen. (1974). The effect of benzimidazole on some membrane properties, leaf steols, and ozone resistance of Phaseolus Vulgaris L. Doctoral thesis.

Sriskantha, Alagacone. (1985). Biochemical characterization of viruses in Agaricus bisporus. Doctoral thesis.

Stambaugh, William James. (1957). Mycelial mats of the oak wilt fungus and their relation to overland disease spread. Doctoral thesis.

Starkey, Thomas Edward. (1975). The influence of peroxyacetyl nitrate on bean (Phaesolus vulgaris L.) subjected to post-exposure water stress. Master's thesis.

Starkey, Thomas Edward. (1977). Analysis of plant disease epidemics. Doctoral thesis.

Stevenson, Richard Elmer. (1982). Quantitative and qualitative effects of radiation on germination of Alternaria solani. Master's thesis.

Stockwell, Christine Anastasia. (1982). The effect of temperature on host-parasite interactions during penetration of wheat leaves by Bipolaris sorokiniana. Master's thesis.

Struble, Frank Ben. (1940). Some disease resistance studies with Snapdragons, Antirrhinum majus L. Master's thesis.

Stuehling, Barbara Ann. (1980). Fusarium wilt of chrysanthemum: a histological study of infected stems and leaves. Master's thesis.

Stutz, Jean Carol. (1981). Various aspects affecting virulence of Fusarium Roseum 'Acuminatum' and Fusarium Roseum 'Avenaceum' in red clover. Doctoral thesis.

Sulaiman, Inon Bte. (1977). The Effect of potato virus X (PVX) immune gene on the susceptibility of potato tubers to Fusarium roseum 'Sambucinum' tuber rot. Master's thesis.