500 



Journal of Agricultural Research 



Vol. III. No. 6 



Table I. — Summary of exposure-plate tests at West Chester, Pa., in ipij, giving number 

 of fungous colonies caught — Continued 



o From wind-blown bark fragments. 



Table II. — Detailed record of all exposure plates in which spores of Endothia parasitica 

 were caught at West Chester, Pa., in igi3 



Plate 



No. 



4008 

 4376 

 4382 

 4383 

 4384 

 4385 

 4386 

 4460 

 4509 

 4529 

 4553 

 4599 

 4600 

 4602 

 4606 

 4609 

 4610 

 4617 

 4619 

 4626 

 4627 



Date of exposure. 



Rainfall. 



Aug. 19. 

 Aug. 27 . 



....do.. 

 ....do.. 

 . . . .do. . 

 ....do.. 

 . . . .do. . 

 Aug. 31 . 

 Sept. 3.. 

 Sept. 4. . 

 Sept. 5. . 

 Sept. 8. . 



do.. 



do.. 



do. . 



do.. 



do.. 



do.. 



do.. 



Sept. 9. , 

 do.. 



Inches. 



0.4 



12 



12 



05s 



05s 



05s 



055 



10 



10 



10 



10 



37 



37 



37 



37 



37 



37 



37 



37 



37 



37 



Time elapsed 



since cessation 

 of rain. 



h. 

 6+ 



10+ 

 o 

 o 

 o 



5+ 

 5 

 5 

 7 

 8 



9 

 13 

 14 



8 



8 



o 

 42 

 44 

 18 

 20 

 22 



35 

 o 

 o 



30 



Length of 

 exposure. 



Minutes. 



hi 



6 



6i^ 



6 



8 



5 



5 



5 



5 



5 



loK 

 "K 

 12 



12 



10 



8 



9 

 6 



8K 



Horizontal 

 distance to 



nearest 

 blight 

 lesion. 



Feet. 



"iK 



15X 

 15K 

 II 



25 



4K 

 a 2 

 a 2 

 a 2 

 a 2 

 II 



14 

 a I 



«2 



"iK 



a 2% 

 a 2 

 "2 

 a 2 

 ''4'/2 



Number of 



spores of 



Endothia 



parasitica 



caught. 



.1 

 I 



3 

 16 

 21 



33 

 20 



I 

 2 



I 

 I 

 2 

 I 



I 

 I 



o stumps more or less overhung by diseased sprouts. 



