INDEX. 



15 



Pecan — 



rosette, histology, cytology, and relation to other chlorotic Bulletin No. Page. 



diseases, bulletin by Frederick N. Rand 1038 1^2 



tree, injury by avocado red spider 1035 4 



trees, transplanting and fertilizing, experiments 1038 30-31 



Pennsylvania — 



Experiment Station, work on sunflower silage feeding 1045 24-25 



game — • 



killing in 1920 1049 20 



preserves, refuges for hunted animals 1049 30, 31 



Peruvian sunflower. See Sunflower. 



Peucedanum foeniculecewrn, occurrence in western South Dakota. . 1039 4 



Pheasant, breeding to increase supply 1049 42, 44 



importation, 1906-1915, results 1049 36 



killing records in various States 1049 19-22 



Phenol, Compound No. 1, spraying experiments 1032 26 



Phoma V.jnum. See Blackleg, cabbage. 



Plank, H. K., and Carl Heinrich, bulletin on "The blackhead 



fire worm of cranberry on the Pacific coast " 1032 1^6 



Plants, absorption studies 1038 5 



Plums, sprayed, poisonous residue on fruit at picking time 1027 23, 49 



Poison — 



baits for Argentine ants 1040 9, 18 



plants, avoidance on ranges 1031 76 



Poisons — 



metal on sprayed fruits and vegetables, bulletin by W. D. 



Lynch, C. C. McDonnell, J. K. Haywood, A. L. Quain- 



tance, and M. B. Waite 1027 1-66 



residues from sprays, determination methods 1027 16-18 



Porthetria dispar. See Gipsy moth. 



f 8,10-12, 



13 17-19 

 Porto Rico sweet potato, description, canning quality, etc 1041< ' qioq' 



i ^27, 30 

 Potatoes — 



acreage under irrigation, Colorado, Cache la Poudre Valley, 



1916, 1917 1026 43 



irrigation in Colorado, 1916, 1917 1026 67-68, 84 



losses from specified causes, in various localities, 1909-1918... 1043 6, 8, 11 



Poudre Canal, Colo. , descriptioti and capacity 1026 39-42 



Poverty weed, occurrence and economic importance in South 



Dakota 1039 4-5 



Precipitation — 



arid Southwest, tables 1031 11-18 



data for fruit-growing sections 1027 49-57 



relation to yield of grains, South Dakota 1039 6-8 



Preservatives, wood — 



tar-creosote solutions 1036 79-83 



coal-tar, and water-gas tar creosotes, properties and testing 



methods, bulletin by Ernest Bateman 1036 1-114 



use for control of sap-stain and mold 1037 47-48 



Proso — 



growing — 



on dry land, experiment in South Dakota 1039 37-40 



under irrigation, experiments in South Dakota 1039 61-62 



seeding rates and dates, dry-land and irrigation farming, 



South Dakota 1039 12 



yields on dry land 1039 38,39,40 



Pseudococcus — • 



citrophilus. See Mealybug, citrophilus. 

 gahani — 



description , . . 1040 5 



See also Mealybug, citrophilus. 

 Pucdnia — 



graminis tritici, inoculation of wheat, experiments 1046 4-24 



tritidna, leaf rust of wheat, epidemics, etc 1046 26 



