212 
Journal of Agricultural Research 
Vol. XXIV, No. 3 
Tabi,]® XI .—Comparative effects of various strains'* of Pythiacystis citrophthora and 
Phytophthora terrestria on lemon and orange bark—Eureka lemon trunks about 6.^ cm. 
in diameterf budded high on sweet-orange stocks, at Riverside, Calif. Inoculations 
April ly, igij; examination May 20, igi^ 
Experi¬ 
ment 
No. 
1 
2 
3 
4 
. ; 5 
6 
7 
8 
10 
%x 
<1 ; 
12 
13 
14 
15 
1 ox-none; i»sUght; 3»meditim; 3—copious. 
Table XII .—Comparative effects of different strains" of Pythiacystis citrophthora 
and Phytophthora terrestria in inoculations on trunks of 20-year-old Lisbon lemon 
trees at Santa Paula. Inoculationsy April g, igi4; examination, August 14, igi4 
Experi¬ 
ment 
No. 
Original source of cultures. 
Organism. 
Size erf dis¬ 
eased area. 
Gum 
formation.! 
Cm. 
I 
Lemon tree, Santa Paula, Calif... 
Pythiacystis citro¬ 
23 by 10— 
3 
phthora. 
T-Ptrifiti tTPi» Whittipr. Calif. 
.do. 
8 b V K . 
2 
2 
Orange tree, Lindsay, Calif. 
Phytophthora ter¬ 
2.5 by 1.3.. 
I 
restria. 
Pomelo tree. Palmetto. Fla. 
.do. 
8 bv 4 . 
2 
0 
4 
Orange tree, Cuba. 
6 by 2.5.... 
2 
5 
Tangelo tree, Isle of Pines. 
.do. 
loby s. 
2 
Host and place on tree inoculation. 
Killed area. 
Eureka lemon above bud 
union. 
Orange stock below bud 
union, same tree. 
Eureka lemon above bud 
union. 
Cm. 
3 by I-3- •- 
2 by I. 
2.5 by 1.5.. 
Orange below bud union.. 
Eureka lemon above bud 
union. 
0. 
4 by 2.5.... 
Same tree on orange stock 
below bud union. 
Lemon bark above bud 
union. 
Orange bark below bud 
union. 
Lemon bark above bud 
union. 
5 by 2. 
30 by 18 (PI. 
6.C). 
46 by 18 (PI. 
6, C). 
2oby^)(Pl. 
Orange bark below bud 
union. 
Lemon bark above bud 
union. 
Orange bark below bud 
union. 
Lemon bark above bud 
union. 
Orange bark below bud 
union. 
Lemon and orange bark.... 
6 by 5 (PI. 
6, D). 
23 by 6 (PI. 
6. D). 
19 by s (PI. 
6, B). 
23 by 8 (PI. 
6, B). 
(PI. 6 A).. 
Source of culture. 
lemon bark,Whittier, Calif. 
. .do.. . . ....... 
Pythiacystis citrophthora from 
lemon bark, San Diego, 
Calif. 
.,...do. .. 
Phytophthora terrestria from 
ora^e bark, Lindsay, 
Phytophthora terrestria, same. 
Pythiacystis citrophthora itom 
lemon fruit, California. 
Pythiacystis citrophthora, same 
Phytophthora terrestria, from 
pomelo bark. Palmetto, 
Fla. 
Phytophthora terrestria, 
Phytophthora terrestria from 
orange bark, Cuba. 
Phytophthora terrestria, same. 
Phytophthora terrestria from 
tangelo, Isle of Pines. 
Phytophthora terrestria, same. 
Control (cut without inocu¬ 
lation). 
Gum 
forma¬ 
tion.! 
1 i«sliglit; 2=»medium; 3—copious. 
