MULBERRY-DWARF TROUBLES IN JAPAN. 21 5 



Plot. 



Variety. 



Number of 

 plants. 



Date of 

 picking off 

 the leaves. 



Result. 



All Ihe leaves taken. 



Komaki. 



S 



3 times. 

 (May 7-Sept 9) 



1 Healthv 7 

 ( Diseased 2 



A portion of leaves ) 

 taken. \ 



Komaki 



S 



3 times. 

 (Apr. 28-Sept. 9) 



( Healthy 5 



New stems, together ] 

 with leaves taken. ) 



( Roso, Tsuru- 

 ( ta, Takasuke. 





2 times. 

 (May 18-July 15) 



Healthy 995 



\ Partly diseas- 

 S ed 96 



' Diseased 198 



> . 



Takasuke. 



6 



I times. 

 (May 28) 



| Healthy 5 

 f Diseased 1 



Stem cut off. 



( Takasuke, 

 ) Hosoye, 



/ A 1; 1 0 i 



122 



1 times. 

 (May 21) 



Healthy 75 

 < Diseased 34 

 ^ Dead 13 



Total. 





1118 





Healthy 783 

 Disease! 322 



This table shows that by frequent picking off of the leaves, 

 nearly 4 of the plants may become diseased. 



Second Experiment. 



Variety. 





Date of 

 picking. 



Number 



of 

 plants. 



Healthy. 



Diseased. 



Partly 



diseased. 



Dead. 



Takasuke, 



All the leaves 

 taken. 



August 14 



92 



81 



2 



9 





>» 



A portion of 

 leaves taken. 





82 



68 



2 



12 







All the leaves 

 taken. 



, J u 'y 14 



\ .1 3° 

 / August 15 



Ir." 30 



Sept. 13 



84 



69 



I 



14 





Ros5. 



A portion of 

 leaves Uken. 



August 20 



\ »■ 3° 



< Sept. 8 



/ •> '5 



v » 23 



561 



530 



6 



20 



2 



