194 



Journal of Agricultural Research 



Vol. XIX, No. s 



Table IV. — Inoculations on young pummelo leaves made immediately after rain and 

 on consecutive days following the rain from infusions of orchard soil from beneath a 

 heavily infected grapefruit tree 



Leaves No. 



I to 5 



6 to lo 



II to 15 



16 to 20 



21 to 25 



26 to 

 31 to 



36 to 

 41 to 

 46 to 



51 to 



60 



70 



75 

 80 



85 

 90 



95 



56 to 



61 to 



66 to 



71 to 



76 to 



81 to 



86 to 



91 to 



96 to 100 

 loi to 105 

 106 to no 

 III to 115 

 116 to 120 



121 to 125 



126 to 130 



131 to 135 

 136 to 140 

 141 to 145 

 146 to 150 

 151 to 155 

 156 to 160 

 161 to 165 

 166 to 170 

 171 to 175 

 176 to 180 

 181 to 185 

 186 to 190 

 191 to 195 

 196 to 200 



Infusion 

 tube No. 



13 

 14 

 15 

 16 



17 

 18 



19 



20 



23 

 24 



25 

 26 

 27 

 28 

 29 

 30 

 31 

 32 



2>2, 

 34 

 35 

 36 

 37 

 38 



39 

 40 



Number of days 



between rain and 



inoculation. 



Immediately 



after rain. 

 ....do 



.do. 

 .do. 

 .do. 



Date of inocula- 

 tion on leaves. 



July 20, 1918 

 do 



.do. 

 .do. 



.do. 



July 21, 1918 

 do 



.do. 

 .do. 

 .do. 



July 22, 1918 



do 



do do. 



do do. 



do do. 



July 23,1918 do. 



do do. 



do do. 



do do. 



do do. 



July 24, 1918 do. 



do do. 



do j do. 



do do. 



do ' do. 



July 25, 1918 I do. 



....'.do I do. 



do t do. 



do I do. 



do do. 



July 27, 1918 do 



Infections from 200 

 punctures. 



All negative .... 



8>^ per cent pos- 

 itive. 



4>^ per cent pos- 

 itive . 



12^ per cent 

 positive . 



I per cent posi- 

 tive. 



All negative .... 



^ of I per cent 

 positive . 



All negative .... 



do 



do 



% oi 1 per cent 

 positive . 



All negative .... 



.do. 



do 



do 



do 



Julv 29, 191^ 



do , 



do 



do 



do 



.do. 

 .do. 

 .do. 

 .do. 

 .do. 

 .do. 

 .do. 

 .do. 

 .do. 



Date of observa- 

 tion. 



191J 



July 31,1918. 

 Do. 

 Do. 

 Do. 



Do 



Do. 

 Do. 



Do. 

 Do. 

 Do. 

 Do. 



Do. 



Do. 



Do. 



Do. 

 Aug. 



Do. 



Do. 



Do. 



Do. 



Do. 



Do. 



Do. 



Do. 



Do. 

 Aug. 3, 



Do. 



Do. 



Do. 



Do. 

 Aug. 16, 191^ 



Do. 



Do. 



Do. 



Do. 



Do. 



Do. 



Do. 



Do. 



Do. 



191; 



SUMMARY OF EXPERIMENT II 



Inoculations made from rain water collected from the foliage of a 

 heavily infected grapefruit tree gave positive results upon young pum- 

 melo leaves. Inoculations made from infusions of the soil beneath such 

 a heavily infected tree also gave positive results on pummelo leaves 

 immediately following the rain. On the first day after the rain there 



