638 



Index to V'olume IX 



grasshoppers. 87: 189, 194-196; 1918: 



335-338 

 INSECTS, OF INTEREST TO COT- 

 TON GROWERS. 87: 172-205. 

 salt marsh caterpillar. 87: 183-184. 

 seed-corn maggot. 1921: 584. 

 Southwestern cotton stainer. 87: 190- 



192. 

 spider, two-spotted. 87: 201-202. 

 Phyllactinia corylca : 



causing leaf spot of ash. 1921: 614. 

 Phyllostachys qiiilioi. 1919: 431. 

 Physalis augiilata var. Liiikiana (yellow 

 flowered ground cherry). 87: 183. 

 Pickrell, C. U. 1920: 429, 432, 449-454. 

 Pine, Aleppo (Finns Iialepensis). 1920: 



460-461. 

 Pingue, or Colorado rubber plant: 



poisoning range sheep. 1918: 299. 

 Pinus Iialepensis (Aleppo pine). 1920: 



460-461. 

 Pipe, cement (see cement pipe). 

 Pistach tree (Pistacia vera and P. chi- 

 li cnsis) : 

 suited to Arizona conditions. 1920: 

 463; 1921: 595. 

 Pistacia atlantica. 1919: 431. 

 P.chinensis. 1920: 463. 

 P.. lentiscus. (Mastac tree). 1920: 



461. 

 P. vera. 1919: 431 ; 1920: 463. 

 Pittosporum phillyracoides (willow-leaf 



pittosporum). 1920: 461. 

 Plant Breeding: 

 experimental work. 1918: 314-321 ; 

 1919: 456-462; 1920: 480-483; 

 1921: 601-605. 

 Federal Station at Sacaton. 85: 30-31. 

 projects. 1918: 283; 1919: 401: 1920: 

 433; 1921: 554. 

 plant diseases affecting: 

 alfalfa. 1918: 301; 1921: 611. 

 apple. 1921: 612-613. 

 ash. 1921: 614. 

 barlev. 1920: 445; 1921: 611. 

 cotton. 90: 273, 274; 1918: 301 : 1919: 



418-419; 1921: 609-610, 611. 

 Cottonwood. 1918: 301. 

 date. 1921: 606-609; 613. 

 gooseberry. 1921: 613. 

 grape. 1921: 613. 

 lettuce. 1921: 610-611, 614. 

 melons. 1918: 301; 1921: 611. 

 okra. 1921: 614. 

 oleander. 1921: 614. 

 orange. 1920: 470; 1921: 613. 

 peach. 1921: 613. 

 pear. 1921:613. 

 peppers. 1918: 301. 



pepi)er tree. 1921: 614. 

 poplar. 1918: 301. 

 potato. T. H. 136; 1921: 612. 

 raspberry. 1921: 614. 

 rose. 1921: 614-615. 

 snapdragon. 1921: 615. 

 spinach. 1921: 614. 

 strawbcrrv. 1921: 614. 

 tomato. 1921: 614. 

 Plant introduction. 1918: 300-301; 

 1919: 430-431, 441 ; 1920: 459-463, 

 473; 1921: 595. 

 Plant Pathology: 

 experimental work. 1921: 606-615. 

 projects. 1918: 284, 285; 1921: 554. 

 Plasm para viticola: 



causing mildew of grape. 1921: 613. 

 Plums. 1920: 471; 1921: 594. 

 Poison baits for insect pests. 87: 195; 



1918: 335-338. 

 Poison plant investigations. 1918: 297- 

 299; 1919: 428-431; 1920: 455- 

 459; 1921: 579. 



Pomegranate. 1918: 304. 



Pomology. 1918: 303-309; 1919: 439- 



441. 

 Poplars: 



Carolina and Lombardv. 1918: 301- 

 302. 



Carolina (Popnlus del to ides). T. H. 

 138. 



Lombardy (P. nigra var italica). 

 T. H. 138. 



narrow leaf (P. angustifolia). T. H. 

 138. 



silver leaf (P. alba var. nivca). T. H. 

 138. 

 Populiis acuminata (smooth-bark cotton- 

 wood). T. H. 138. 



P. alba var. nivea (silver leaf poplar). 

 T. H. 138. 



P. angustifolia (narrow leaf poplar). 

 T. H. 138. 



P. deltoidcs (Carolina poplar). T. H. 

 138. 



P. Fremontii var. JVisliceiii (western 

 Cottonwood). T. H. 138. 



P. Grandidentata (large-toothed as- 

 pen). T. H. 138. 



p. Macdou'^ali ( MacDougal's cotton- 

 wood). T. H. 138. 



P. nis,ra var. italica (Lombardy pop- 

 lar). T. H. 138. 



P. treniuloides (American aspen). 

 T. H. 138. 

 Poppies: 



chemical composition of. 1919: 411. 



