DISEASES DUE TO BACTERIA 129 
fectly clean tops, and yielded a good crop of sound 
fruit. 
During previous seasons observations have been made 
in the houses at Cheshunt Experimental Station to 
ascertain the relation between manurial treatment and 
crop management to the incidence of the disease. The 
results are indicated below in Tables 8, 9 and 10. 
TABLE 8 
The Effect of Different Manurial Treatments on the 
Incidence of “ Stripe” Disease. 
DISHASED PLANTS. 
Total 
Treatment. No. of 1919. 
Variety. Pinus 
Dts. 
No. |Per Cent.| No. |Per Cent. 
Comet 1C.A. without potash 120 | 78 | 65 88 
Do. Untreated ee Be 42 57 
Do. 1C.A. with dung » | 45] 388 42 
Do. 1C.A. without phos- 
| phates » | 41] 34 43 
Do. 1 AS - 40 33 34 
Do. 1C.A. without nitrogen » | o4 28 42 
Do. 1Double C.A. > ee 28 28 
Kondine | 1C.A. without potash 120 | 83 | 28 80 
Red 
Do. Untreated oo p80 Foss 40 
Do. 1C.A. with dung oe [asf 38 82 
Do. 1C.A. without phos- 
phates » | 28} 23 26 
Do. 1C.A. without nitrogen wee |S 23 
Do. 1Double C.A. og ~ ta 12 26 
Do. 1C,A. a pee BE 26 
These tables show clearly the differences in the 
relative susceptibility of the varieties tested, and point 
to the selection or breeding of a resistant variety as one 
means of controlling the disease. They also show that 
1 Complete Artificials. 
Q 
