SOURCES OF APPLE BITTER-ROT INFECTIONS. 
19 
OTHER HOST PLANTS. 
Shear and Wood (15) in 19138, after careful cultural and morpho- 
logical studies in addition to cross-inoculation work with cultures 
from various hosts, gave the following list of 34 plants lable to 
attack by Glomerella cingulata (Stoneman) S. and V. S. 
Brya ebenus (i) DC. 
ebony. ) 
Caryota rumphiana Mart. (Palm.) 
(Jamaica 
Cinnamomum zeylanicum Nees. (Cin- 
namon. ) 
Citrus aurantium sinensis L. (Sweet 
orange. ) 
Citrus decumana (l.) Murr. (Pom- 
elo.) 
Citrus limonum Risso. (Lemon.) 
Citrus nobilis Lour. (Mandarin.) 
Coffea arabica Ll. (Coffee. ) 
Costus speciosus (Koenig) Smith. (Spi- 
ral flag.) 
Curculigo sp. 
Eriobotrya japonica (Thunb.) Lindl. 
(Loquat. ) 
Ficus carica lL. (Fig.) 
Ficus elastica Roxb.. (Rubber plant.) 
Ficus longifolia Sehott. 
Ginkgo biloba L. 
Gleditsia triacanthos Ul. 
cust. ) 
Hedyscepe sp. = Kenita. 
Ligustrum vulgare I. (Privet.) 
Malus sylvestris Mill. (Apple.) 
Mangifera sp. (Mango.) 
(Honey lo- 
(Palm.) 
Maranta arundinacea T. 
rowroot. ) 
Oxycoccus macrocarpus 
(Cranberry. ) 
(?) 
(Ait.) Pers. 
(Ar- 
Persea gratissima Gaertn. f. (Avo- 
cado. ) 
Phormium tenazx Forst. 
Pimenta acris (Swartz) Jostel. 
Piper macrophyllum Swartz. (Pep- 
perwort. ) 
Pitcairnia corallina Linden. 
| Psidium guajava lL. (Guava.) 
Ribes oxyacanthoides L. (Goose- 
berry. ) 
Rubus occidentalis L. (Black rasp- 
berry. ) 
Thea japonica (1l.) Baill. 
Thea sinensis L. (Tea.) 
Theobroma cacao lL. (Chocolate nut.) 
Vitis labrusca L. (Coneord grape.) 
Annona cherimola Miller. (Cheri- 
moya.) 
Crataegus sp. 
Rubus trivialis (eult.). 
berry. ) 
Smilax medica Schl. and Cham. 
Vanilla planifoia Andrews. 
nilla.) 
(Camellia. ) 
(Hawthorn. ) 
(White dew- 
(Va- 
Taubenhaus (17) in 1914 expressed the belief that Glocosporium 
officinale KE. and E., which he found caused a disease of the spicebush 
(Benzoin aestivale (.) Nees) and of sassafras (Sassafras varii- 
folium (Salisb.) Ktze.) in Delaware, is identical with the fungus 
which causes apple bitter-rot. He based his belief upon the fact that — 
apples inoculated with the organism from the spicebush and sassafras 
developed the characteristic bitter-rot. He recommends the exter- 
mination of both the spicebush and the sassafras, so as to prevent 
them from harboring the bitter-rot, fungus and carrying it to the 
apple. 7 
The writer was never able to find the bitter-rot fungus on sassafras 
in Arkansas, though sassafras is very abundant in that section of the 
country. It is rather common, in fact, to find orchards surrounded 
by hedges of sassafras which have escaped destruction because of 
their nearness to the wire fences inclosing the orchards. 
None of these plants as sources of infection compare in importance 
with mummied apples, apple cankers, or diseased apples. On none 
of these hosts, such as sassafras, raspberry, or hawthorn, which are 
commonly found in close proximity to orchards, does the disease be- 
come very destructive or epiphytotic, as it does upon the apple. Fur- 
. 
