1923] 



LEHMAN — POD AND STEM BLIGHT OF SOYBEAN 



119 



In shape, pycnospores are straight, fusiform, commonly rounded 

 at one end and noticeably pointed at the . other, but may vary 

 by having both ends rounded or one end drawn out to a long, 

 tapering point so that the entire length 

 is nearly twice normal. Slightly curved 

 forms are found. They vary some- 

 what in si ze when taken from different 

 sources as indicated by the following 

 measurements : 



From stem of host artificially inocu- 

 lated 4.5-10 X 1.7-2.6 jjl, average 

 6.27 X 2.20 (&. 



From the same stem as above, meas- 

 urements taken after 24 hours in moist 

 chamber: 5.5-9.6 X 1.8-2.5 jx, average 



6.52 X 2.20 (x. 



From soybean pod inoculated in moist chamber with spore 

 suspension, measurements made 11 days after inoculation when 



Fig. 1. Pycnosporophores of 



soybean fungus. 



L 



/OM- 



i 



Fig. 2. Pycnospores of soybean fungus. 



part of pycnidia were exuding spores: 6.0-10 X 1.8-2.8 (x, 



average 7.15 X 2.29 (x. 



From lima bean pod inoculated in 



moist chambers: 5.5-9.2 



7 



X 2.31 (x. 



From soybean leaf 16 days after 

 3 a, average 6.57 X 2.30 (x. 



5 



X 1.8 



