July 7-Sept. 29, 1923 
Index 
5°3 
. Page 
Inheritance of Dwarfage in Maize: J. H. 
Kempton. 297-321 
Inoculation experiments— 
blackberry with orange rusts.219-223 
crowngall into tomato stems. 120-125 
potato diseases.46-51,65-91 
Jones, Carleton Parker: Determination of 
Sulphur Compounds in Dry Lime-Sul¬ 
phur. 323-336 
Jones, D. Breese, and Pinks, A. J.: Growth- 
Promoting Value 'of the Proteins of the 
Palm Kernel, and the Vitamin Content of 
Palm-Kernel Meal... 165-169 
Jones, t. R., Williamson, M. M., Wolf, P. A., 
and McCulloch, Lucia: Bacterial Leafspot 
of Clovers.471-490 
Juices, plant stalks and leaves, comparative 
acidities. 462-464 
Kempton, J. H.: Inheritance of Dwarfing in 
Maize.. 297-322 
Kunkelia, short-cycled form of Gymnoconia, 
blackberry infection. 219-240 
Leafroll, potato- 
relation to mosaic and other diseases.257-263 
transmission. 54,61,63-64,95,102,105 
Leaf rust. See Rust. 
Leafspot— 
bacterial, of clovers.471-490 
bacterial, organism of clovers, cultural 
characters and host relation. 475-489 
clover, history and distribution.472-473 
Leaves, com, changes in dwarfing.316-319 
Leiby, R. W., and Hill, C. C.: The Twinning 
and Monembryonic Development of Platy - 
gaster hiemalis, a Parasite of the Hessian 
Ply... 337-350 
Leighty, C. E., and Mains, E. B.: Resistance 
in Rye to Leaf Rust Puccinta dtspersa 
Erikss.. 243-252 
Light, effect on Rhizopus spp. activities.... 157-160 
Lime, use on wheat field, effect on “take-all” 
disease....:. 354-35$ 
Lime-sulphur— 
dry, determination of sulphur compounds 232-336 
spraying apple trees for blotch canker, re¬ 
sults. 409-412 
Liming, effect on efficiency of phosphates, 
Porto Rico. 184-186 
Literature citations relating to— 
acidity production of fungi.. 163-164 
animal nutrition. 429 
bean diseases. 153 
com dwarfing.320-332 
cottonseed composition... 295 
grain rust. 251-252 
hymenopterous parasites... 349 
Pkytopkthora spp. 284 
, temperature, relations to fungus diseases.. 449 
wheat diseases. 358 
Livingston, Burton E., and Hutchins, LeeM.: 
Oyxgen-Supplying Power of the Soil as 
Indicated by Color Changes in Alkaline 
Pyrogallol Solution. 133-140 
McCulloch, Lucia, Jones, L. R., Williamson, 
M. M., and Wolf, P. A.: Bacterial Leafspot 
of Clovers. 471-490 
Mains, E. B., and Leighty, C. E.: Resist¬ 
ance in Rye to Leaf Rust, Puccinta dtspersa 
Erikss.... v .. 243-252 
Manure, wheat, effect on "take-all” disease, 354-356 
Martin, R. D., Ballard, W. W., and Simp¬ 
son, D. M.: Growth of Fruiting Parts in 
Cotton Plants. 195-208 
Metabolism, plant, temperature effects. 13-30 
Millet, growing, experiments with phosphatic 
fertilizers. 172-184 
Monosulphid, determination, by carbonic- 
add method. 325-327) 330/331-332 
Mosaic- 
potato— 
relation to leafroll in Vermont. 257-263 
symptoms, progressive development. 259 
transmission experiments.__ 46-50,62,63-92 
tobacco, inoculation into potato and 
tomato. 86-89 
Necator americanus (hookworm). 359-362 
Necrosis, potato disease, description ana 
transmission. 54,61,64 
P« 3 e 
Net-necrosis, potato tuber, relation to foliage 
diseases. 262-263 
New Type of Orange-Rust on Blackberry, 
A.: B. O. Dodge. 491-494 
Nightshade, inoculation with potato diseases, 
results. 90-91 
Nursery stock ..apple-blotch canker infection. 414 
Oil content of cottonseed, relation to gossypol 
variation. 285.-295 
Oil palm, Elaeis guineensis . 165-169 
Ophiobolus cariceti — 
cause of “take-all” disease of wheat. 351-358 
pathogenicity in relationship to weakened 
plants. 351-358 
Ophis humilis, parasite of fruit fiy, introduc¬ 
tion and records. 1,4-7 
Orange pest from Honduras. 253-254 
Orange rust. See Rust, orange. 
Orchards—old, blotch cankers distribution. 412-413 
young, blotch cankers, development and 
control. 413,414-416 
Origin and Control of Apple-Blotch Cankers: 
Max W. Gardner. 403-418 
Owens, C. E., and Hungerford, Charles W.: 
Specialized Varieties of Pucctnia glumarum 
and Hosts for Variety trtitet . 363-402 
Oxygen, Supplying Power of the Soil Meas¬ 
urement method: Lee M. Hutchins and 
Burton E. Livingston. 133-140 
Palm-kernel meal, vitamin content of. 165-169 
Palm; oil, value of kernels as animal feed.... 165-169 
Papaya, infection with coconut bud rot. 270 
Parasite, Hessian fly— 
Platy gaster hiemalis, development method 33 7-350 
vernalis Myers .. 31-42 
Parasites, fruit-fly, experiments in Hawaii, 
1919 and 1920. 1-7 
Pathogenicity of Ophobolus cariceti in Its 
Relationship to Weakened Plants: H. R. 
Rosen and J. A. Elliott..^51-358 
Peach, infestation with fruit fly, Hawaii, 
and effect of parasites.. 2-4 
Peas, infection— 
with coconut bud ret... 270 
with Corticium vagum, temperature studies 
and results. 432-438 
Pectinase, production by Rhizopus spp. and 
Botrytis cinerea . 155-164 
Pennsylvania, Carlisle laboratory, work on 
Hessian fly.31-4* 
Pharynx and Alimentary Canal of the Hook¬ 
worm Larva Nector americanus N. A. 
Cobb.. 359-363 
Philippines, cacao and coconut diseases,. 
comparative study.. 267-284 
Phosphates, efficiency in Porto Rican soils, 
factors affecting. i 7 *-i 94 
Phyllosticta solitaria (apple-blotch fungus). 403-418 
Phytophaga destructor (Hessian fly), para¬ 
sites on... 31-42, 337-350 
Phytopkthora— 
faberi — 
characteristics, morphology, and relation¬ 
ships . 268-284 
on coconut and cacao in the Philippine 
Islands, comparative study.. 267-284 
strains from various plants in the Philip¬ 
pines . 282-283 
Plant growth, need of oxygen supply in soil. I33~i34 
Plants— 
metabolism, temperature effects. 13-30 
stalk juices, comparison with leaf juices in 
jacidity. 4^2-464 
Plaiygaster — 
hiemalis —development of. 337 ~ 35 o 
life history and development methods... 337-350 
twinning and monembryonic develop¬ 
ment. 337-350 
vernalis, importance, distribution, life his¬ 
tory. and mortality. 31-42 
Plaiygaster vernalis Myers, an Important 
Parasite of the Hessian Ply: Charles C. 
Hill..... 31-4* 
Porto Rico, fertilizer studies, efficiency of 
phosphates in soils. 171-194 
Potato— 
degeneration diseases, transmission and 
control... 46-111 
