198 



Journal of Agricultural Research 



Vol. XIX, No. 5 



Table V. — Inoculation of young pummelo leaves from infusions of untreated soil in a 

 box made on consecutive days after inoculation with P. citri. The inoculated soil was 

 placed in the orchard to simulate field conditions — Continued 



TabIvE VI. — Inoculations on young pummelo leaves from infusions of autoclaved soil in 

 a box m,ade on consecutive days after inoculation with P. citri. The inoculated soil 

 was placed in the orchard to simulate field conditions 



Leaves No. 



I to 5 



6 to 10 



II to 15 



16 to 20 



21 to 25 



26 to 30 

 31 to 35 

 36 to 40 

 41 to 45 

 46 to 50 



51 to 55 

 56 to 60 

 61 to 65 

 66 to 70 

 71 to 75 



76 to 80 

 81 to 85 

 86 to 90 

 91 to 95 

 96 to 100 



loi to 105 

 106 to no 

 III to 115 

 116 to 120 



121 to 125 



Infusion 

 tube No. 



13 

 14 



15 



16 



17 

 18 



19 

 20 



23 

 24 



25 



Number 

 of days 



after inoc- 

 ulation 



into soil. 



Date of inoculation 

 on leaves. 



Oct. 23, 1918 

 ....do 



do 



do 



....do 



Oct. 24, 1918 



do 



do 



do 



....do 



Oct. 25, 1918 



do 



do 



....do 



....do 



Oct. 26, 1918 



....do 



....do 



....do 



....do 



Oct. 28, 1918 

 do 



....do 



do 



....do 



Infections from 200 

 punctures. 



96 per cent positive . 

 .do 



. . . .ao 



98 per cent positive . . 

 95>2 per cent positive . 



99 per cent positive . . 



100 per cent positive . 

 ....do 



do 



do 



....do 



.do. 

 .do. 



99/4 per cent positive . 

 100 per cent positive. 

 do 



Date of 

 observation. 



Nov. 2, 1918. 

 Do. 

 Do. 

 Do. 

 Do. 



Oct. 30, 1918. 



Do. 



Do. 

 Nov. 4, 1918. 



Do. 



Do. 

 Do. 

 Do. 

 Do. 

 Do. 



do Nov. 5, 



96 per cent positive . . Do. 



100 per cent positive . Do. 



do 1 Do. 



do I Do. 



95K per cent positive . i Nov. 9, 

 100 per cent positive . | Do. 



99 per cent positive. . Do. 



100 per cent positive . Do. 

 94}4 per cent positive . Do. 



191I 



1918. 



