TABLE 1.

Effect of inoculum size on cell morphology in C. ulmi at 20 h of growth

Inoculum size cells/ml	% of mycelia with growth ona:
	GPP	GPR
2 × 107	16	95
1 × 107	15	95
8 × 106	20	95
6 × 106	20	95
4 × 106	20	95
2 × 106	18	95
1 × 106	27	95
4 × 105	95	95
1 × 105	95	95
4 × 104	95	95

^aFilamentous growth is given. Only differentiated cells were counted; thus, the percentages of mycelial-filamentous growth and percentage of yeasts sum as 100%. GPP medium contains proline as the nitrogen source, whereas GPR medium contains arginine. Values shown are averages of data from triplicate experiments performed earlier (14). Similar results agreeing with ±10% were obtained by four researchers using two strains (6404 and 6405) over a span of 20 years.