Arizona Agricultural Experiment Station 



(iZ7 



Pacific Petroleum Company: 



test of fuel oil from. 92': 411. 

 Palmilla, or soapweed, or Spanish dagger 

 (Yucca data): 

 as emergency forage. 1918: 298, 299- 



300, 324. 

 chemical composition of. 1919: 411. 

 Palo bianco, or hackberry (Celtis reticu- 

 lata) : 

 as a browse plant. 1921: 577. 

 Palo verde. 1921: 586. 



"Mexican", or "bagote"' (Parkinsonia 

 aculeata). 1921: 586. 

 PaniciDii laciiaiithum (cotton top). 1919: 



411. 

 Paraffin base type of fuel oils. 92: 409. 

 Pans green: 

 for poisoning insect pests. 87, 183, 

 195; 1918: 2,2,6-32,7. 

 Parke, Lcland S. 1920: 429. 

 Parker Vallcv irrigation project. 95: 



543, 546; 1918: 351. 

 Parkinsonia aculeata ("Mexican palo 

 verde" or "bagote"). 1921: 586. 

 Parlatoria blanchardi (scale of date 



palm). 1920: 470; 1921: 589. 

 Parsley. 1918: 310. 

 Parsnip. 1918: 310. 



wild, or water hemlock : 

 poisoning range stock. 1918: 299. 

 Paschall, Arthur L. 1918: 281. 

 Pasture: 

 browse, versus grass. 1921: 577-578 

 Rhodes grass. Cir. 36. 

 Sudan grass. Cir. 35. 

 sweet clover. Cir. 34. 

 Paw paw. 1921: 595. 

 Peaches: 

 as a "dry-farm" crop. 1920: 473. 

 at Prescott Dry-Farm. 1920: 471. 

 at Sulphur Spring Valley Dry-Farm 



1918: 280; 1920: 474. 

 at the Yuma Station. 1921: 594. 

 diseases. 1921: 613. 

 in Salt River Valley. 85: 43-47; 1921 



594. 

 interplanting in olive orchards. 94 



513. 

 pruning studies. 1920: 471 ; 1921 



591. 

 water requirement studies. 1920: 471; 

 1921: 591. 

 Peanuts : 

 as a cover crop. 89: 247-249; 1919: 



441. 

 at University Farm. 1918: 296. 



Pears : 

 at Sulphur Spring Valley Dry-Farm 



1918: 280. 

 at the Yuma Station. 1921- 594 

 diseases of. 1921: 613. 

 Peas: 

 field. 1918: 287, 289-290, 293; i921- 



584. 

 infested by seed-corn maggot. 1921- 



584. 

 seed testing. Cir. 40. 

 Pecans : 

 suited to Arizona conditions 1920- 

 471; 1921: 591-592. 

 Pectinophora gossypiella Saunders 

 (Egyptian pmk boll worm). 87- 

 178-180; 90: 274. 

 quarantine regulations against 87- 

 203-204. 

 Penduliiia olive, the. 94: 521, 523. 

 Penicilliu}}i: 



present in date rot. 1921: 607. 

 Pentstcmoii antirrhinoides. 1919: 431 

 P.ccntranthifolius. 1919:431. 

 P. cordatus. 1919: 431. 

 P.heterophxllus. 1919:431 

 P.hybridus. 1919: 431. 

 P.spectabilis. 1919: 431 

 P. Torreyi. 1919: 431. 

 P. Wrightii. 1919: 431. 

 Peppers. 1918: 310. 

 Pepper tree: 



hypertrophy and timber rot of. 1921- 

 614. 

 Peronospora effusa: 

 causing downy mildew of spinach 

 1921: 614. 

 Perry, W. S. 94: 493. 

 Persea americana. 1920: 473. 

 Personnel, Station staff. 1918: 280-281- 

 1919: 398-399; 1920: 428-430" 

 1921: 550-552. 

 Pests : 

 aphis. 87: 196-200. 

 boll weevil. 87: 173-175, 203-204; 90- 



274. 

 boll worm: 



"Arizona pink". 1921: 583. 

 cotton. 87: 175-178. 

 Egyptian pink. 87: 178-180, 203- 

 204; 90: 274. 

 brown cotton bug. 87: 192-194. 

 corn ear worm. 87: 175-178. 

 corn stalk borer, larger. 1919: 438 



lesser. 1918: 287, 290, 339-340. 

 cotton leaf perforator. 87: 184-186. 

 cotton leaf worm. 87: 181-183. 

 cotton square dauber. 87: 186-190- 

 1918: 32,7. 



