Rex, Edgar George. (1925). Cabbage Black-leg caused by Phoma. Master's thesis.

Clarke, Gregory Glenn. (1988). Canopy density and spray deposition in apple trees. Master's thesis.

Thomas, Garfield G. (1980). Causal organisms of tomato fruit rot in Pennsylvania canning tomatoes. Master's thesis.

Costanzo, Stefano. (2003). Characterization and mapping of QTLs conferring resistance to late blight in potato. Doctoral thesis.

Collopy, Patrick D. (2004). Characterization of phytase activity from cultivated edible mushrooms and mushroom substrates. Doctoral thesis.

Lanze, Carla E. (2015). Characterization of Pythium and Phytopythium species frequently found in irrigation water. Master's thesis.

Nolt, Barry Lee. (1981). The characterization of RNA-dependent RNA polymerase activities in noninfected and tobacco ringspot virus-infected cucumber cotyledons. Doctoral thesis.

Vargo, Rodney Harold. (1976). Characterization of tobacco ringspot virus-induced ozone resistance in soybean. Master's thesis.

Goodin, Michael M. (1995). Characterization of two viruses associated with Agaricus bisporus. Doctoral thesis.

Cappellini, Raymond Adolph. (1952). A comparative cultural study on graminicolous species of Helminthosporium. 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.

Vali, Rita J. (1991). Comparative fitness and influence of selected fungicide regimes on dicarboximide-resistant and -sensitive strains of Botrytis cinerea Pers. Master's thesis.

Wainwright, Stephen Hollis. (1971). Comparative histopathology of the resistant and susceptible response of Pelargonium spp. to infection by Xanthomonas pelargonii. Doctoral thesis.

Watts, Grace Weston. (1928). A comparative study of the behavior of certan strains of Bacterium tumefaciens in plant tissue. Master's thesis.

Gustow, Evan. (1977). Comparison of basidiospores from healthy and virus-infected sporophores of Agaricus brunnescens Peck. Master's thesis.

Lalancette, Norman. (1982). Comparison of management strategies by quantification of apple powdery mildew epidemics. Master's thesis.

Enyedi, Alexander J. (1991). A comparison of ribulose-1, 5-bisphosphate carboxylase/oxygenase from ozone-sensitive and ozone-tolerant potato cultivars. Doctoral thesis.

Bonifacino, Steven F. (1980). A Compendium of major Sporacarpic diseases of the commercial mushroom Agaricus bisporus (Lange) Imbach. Master's thesis.

Daughtry, Stephanie M. (1997). The Competitive, nonobligate strain of Pseudomonas and its ability to control gray mold on Pelargonium. Master's thesis.

Hamid, Ali Bin Haji. (1981). Components of fitness attributes and the inheritance of resistance of corn to Cochliobolus carbonum race 3. Doctoral thesis.

Rouse, Douglas Irving. (1979). Components of horizontal resistance to powdery mildew of wheat as related to disease progress and parasitic fitness. Doctoral thesis.

Chen, Shu Yi. (1940). Control of damping-off incident to transplanting from sand culture. Master's thesis.

Chandler, Webser Allen. (1955). Correction of field plot data for positional effects with application to the study of fungicides. Doctoral thesis.

Ke, Jing. (1991). Crown condition of Norway spruce [Picea Abies (L.) Karst.] and relationship to foliar and soil elemental status. Doctoral thesis

Torsello, Mary L. (1992). Cryphonectria canker of scarlet oak in Pennsylvania : incidence, severity, and influence on growth. Master's thesis.

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

Campbell, William Andrew. (1935). The cultural characteristics of the species of Fomes. Doctoral thesis.