500 Journal of Agricultural Research Vol, III, No. 6 
TaBLE I.—Summary of exposure-plate tests at West Chester, Pa., in 1913, giving number 
‘ = ve Lia colonies caught—Continued 
Num- Number of fungous ‘ Total’ 
ber Length of Total colonies in any plate| ‘Total | number 
eee bate| ee [ee | ee ce 
culearss: nts prs sored. . Maxi- Mini- colonies. | Endothia : 
posed. mum, mum. parasitica, 
Minutes. He om. Inches. 
Sept. 6..| 18| 5 tozolg|2 1434 | 0 6 ° 39 ° 
7...) I9| 7 to1134|3 4% }o 37 22 | I 186 ° 
8..| 27] 734 to12z 4 16 "s 15 I 195 9 
Q.. | 6 tomy|2 23 fo) 31 2 194 2 
1o..| 18} 8° to1134]|2 50%] 0 31 ° 138 ° 
zz..| 18] gi to144/3 19% | 0 25 ° 118 ° 
mz..| i] 5 tomy 3 «12% ho, 095 { 41 I I2I ° 
13... 19] 7 to13 |3 3% 73 2 332 ° 
14..) 18] 9 tom%i3 9%]o 20 2 126 ° 
1g..| 18] 934 torr 3 6 ° 20 6 202 ° 
16..| 19] 934 to27 -|3 34%] 0 28 ° 251 ° 
17..| 17 | 9 torsl4 | 3 1334 36 
ho. 26 { 2 221 a2 
18..| 28] 93{ to134% 15 5% 67 
ho. 68 { I 539 55 
19..| 26] 10% to17 5 2434 400 
ho, 09 { I 814 7 
20..| 28°] 934 to 18 6 1334 23 
io. 43 { t 194 go 
2I..| 25 | 334 to20 5 5234 ko. 10 160 5 | 1,387 tes 
leas 3 
22..| 36] 63% to 30 9 50 60 ° 494 2 
23.. 24 | 1234 to 23 6 36 fe) 30 ° 261 ° 
¢ From wind-blown bark fragments. 
TaBLEe II.—Detailed record of all exposure plates in which spores of Endothia parasitica 
were caught at West Chester, Pa., in 1913 
ee Ras rei Number on 
cite Date of exposure. Rainfall. giacecmeetion Length of merece Radothia 
9: of rain. exposure. blight parasitica 
lesion caught. 
Inches. Do kom, Minutes. Feet. 
0.4 6+ 0 5 ary I 
12 42 9% 4% I 
12 I 44 6 15iy 
55 18 6% 154 16 
055 20 6 II az 
055 22 8 25 33 
055 33 5 44 20 
1.10 | t 10+ 0 5 a2 I 
I.Io | 5 o ° 5 a2 2 
I.TO | 5 0 ° 5 a2 I 
i.10 |6 0 ° 5 a2 I 
37 5+ 0 10/4 II 2 
+37 5 I 1% 14 I 
- 37 5 ar 12 ay I 
“37 — 94 aa I 
#37 8 30 12 ary I 
- 37 9 ° Io a2 I 
+37 13 ° 8 a2 x 
» 37 14 0 9 G2 I 
-37 |r 8 ° 6 a2 I 
+37 rt 8 30 84 a4 I 
“Stumps more or less overhung hv diseased snrauts. 
